Orthanc/OrthancServer/Resources/Configuration.json

{
  /**
   * General configuration of Orthanc
   *
   * As a general recommendation, you should always favour absolute 
   * paths when you need to provide a path to a file or a directory.  
   * This is not done in this configuration file since we don't know 
   * where Orthanc is going to be installed.
   **/

  // The logical name of this instance of Orthanc. This one is
  // displayed in Orthanc Explorer and at the URI "/system".
  "Name" : "MyOrthanc",

  // Path to the directory that holds the heavyweight files (i.e. the
  // raw DICOM instances). Backslashes must be either escaped by
  // doubling them, or replaced by forward slashes "/".
  "StorageDirectory" : "OrthancStorage",

  // Path to the directory that holds the SQLite index (if unset, the
  // value of StorageDirectory is used). This index could be stored on
  // a RAM-drive or a SSD device for performance reasons.
  "IndexDirectory" : "OrthancStorage",

  // Path to the directory where Orthanc stores its large temporary
  // files. The content of this folder can be safely deleted once
  // Orthanc is stopped. The folder must exist. The corresponding
  // filesystem must be properly sized, given that for instance a ZIP
  // archive of DICOM images created by a job can weight several GBs,
  // and that there might be up to "min(JobsHistorySize,
  // MediaArchiveSize)" archives to be stored simultaneously. If not
  // set, Orthanc will use the default temporary folder of the
  // operating system (such as "/tmp/" on UNIX-like systems, or
  // "C:/Temp" on Microsoft Windows).
  // "TemporaryDirectory" : "/tmp/Orthanc/",

  // Enable the transparent compression of the DICOM instances
  "StorageCompression" : false,

  // Maximum size of the storage in MB (a value of "0" indicates no
  // limit on the storage size)
  "MaximumStorageSize" : 0,

  // Maximum number of patients that can be stored at a given time
  // in the storage (a value of "0" indicates no limit on the number
  // of patients)
  "MaximumPatientCount" : 0,

  // Action to take when the maximum storage is reached.
  // By default, the patients are recycled ("Recycle" mode).
  // In "Reject" mode, the sender will receive a 0xA700 DIMSE status code
  // if the instance was sent through C-Store, a 507 HTTP status code
  // if using the REST API and a 0xA700 Failure reason when using
  // DicomWeb Stow-RS.
  // Note: this value is taken into account only if you have set 
  // a MaximumStorageSize != 0 or a MaximumPatientCount != 0
  // Allowed values: "Recycle", "Reject"
  // (new in Orthanc 1.11.2)
  "MaximumStorageMode" : "Recycle",

  // Maximum size of the storage cache in MB.  The storage cache
  // is stored in RAM and contains a copy of recently accessed
  // files (written or read).  A value of "0" indicates the cache
  // is disabled.  (new in Orthanc 1.10.0)
  "MaximumStorageCacheSize" : 128,

  // List of paths to the custom Lua scripts that are to be loaded
  // into this instance of Orthanc
  "LuaScripts" : [
  ],

  // The period (in seconds) between 2 calls of the "OnHeartBeat"
  // lua callback.  O means the heart beat is disabled.
  // TODO: text below for Orthanc book:
  // Note: that the period is actually not the delay between
  // the end of an execution and the triggering of the next one.
  // Since there is only one lua context, if other lua code is being
  // executed, the heart beat might be delayed even more.
  "LuaHeartBeatPeriod" : 0,

  // List of paths to the plugins that are to be loaded into this
  // instance of Orthanc (e.g. "./libPluginTest.so" for Linux, or
  // "./PluginTest.dll" for Windows). These paths can refer to
  // folders, in which case they will be scanned non-recursively to
  // find shared libraries. Backslashes must be either escaped by
  // doubling them, or replaced by forward slashes "/".
  "Plugins" : [
  ],

  // Maximum number of processing jobs that are simultaneously running
  // at any given time. A value of "0" indicates to use all the
  // available CPU logical cores. To emulate Orthanc <= 1.3.2, set
  // this value to "1".
  "ConcurrentJobs" : 2,

  // Defines the number of threads that are used to execute each type of
  // jobs (for the jobs that can be parallelized).
  // A value of "0" indicates to use all the available CPU logical cores.
  // (new in Orthanc 1.11.3)
  "JobsEngineThreadsCount" : {
    "ResourceModification": 1     // for /anonymize, /modify
  },

  /**
   * Configuration of the HTTP server
   **/

  // Enable the HTTP server. If this parameter is set to "false",
  // Orthanc acts as a pure DICOM server. The REST API and Orthanc
  // Explorer will not be available.
  "HttpServerEnabled" : true,

  // Enable/disable the Orthanc Explorer Web user interface. This
  // option is only meaningful if the "HttpServerEnabled" option is
  // set to "true" (new in Orthanc 1.8.2).
  "OrthancExplorerEnabled" : true,

  // HTTP port for the REST services and for the GUI
  "HttpPort" : 8042,

  // When the following option is "true", if an error is encountered
  // while calling the REST API, a JSON message describing the error
  // is put in the HTTP answer. This feature can be disabled if the
  // HTTP client does not properly handles such answers.
  "HttpDescribeErrors" : true,

  // Enable HTTP compression to improve network bandwidth utilization,
  // at the expense of more computations on the server. Orthanc
  // supports the "gzip" and "deflate" HTTP encodings.
  // When working on a LAN or on localhost, you should typically set
  // this configuration to false while when working on low-bandwidth,
  // you should set it to true.
  // Note in versions up to 1.12.1, the default value was "true" and is
  // "false" since 1.12.2.
  "HttpCompressionEnabled" : false,

  // Enable the publication of the content of the Orthanc server as a
  // WebDAV share (new in Orthanc 1.8.0). On the localhost, the WebDAV
  // share is mapped as "http://localhost:8042/webdav/".
  "WebDavEnabled" : true,

  // Whether to allow deletions through the WebDAV share. This is
  // disabled by default to avoid accidental loss of DICOM instances.
  "WebDavDeleteAllowed" : false,

  // Whether to allow uploads through the WebDAV share.
  "WebDavUploadAllowed" : true,



  /**
   * Configuration of the DICOM server
   **/

  // Enable the DICOM server. If this parameter is set to "false",
  // Orthanc acts as a pure REST server. It will not be possible to
  // receive files or to do query/retrieve through the DICOM protocol.
  "DicomServerEnabled" : true,

  // The DICOM Application Entity Title (cannot be longer than 16
  // characters)
  "DicomAet" : "ORTHANC",

  // Check whether the called AET corresponds to the AET of Orthanc
  // during an incoming DICOM SCU request
  "DicomCheckCalledAet" : false,

  // The DICOM port
  "DicomPort" : 4242,

  // The default encoding that is assumed for DICOM files without
  // "SpecificCharacterSet" DICOM tag, and that is used when answering
  // C-FIND requests (including worklists). The allowed values are
  // "Ascii", "Utf8", "Latin1", "Latin2", "Latin3", "Latin4",
  // "Latin5", "Cyrillic", "Windows1251", "Arabic", "Greek", "Hebrew",
  // "Thai", "Japanese", "Chinese", "JapaneseKanji", "Korean", and
  // "SimplifiedChinese".
  "DefaultEncoding" : "Latin1",

  // The transfer syntaxes that are accepted by Orthanc C-STORE SCP.
  // This is an array listing the accepted transfer syntax UIDs. Each
  // entry can contain wildcards ("?" or "*"). By default, all the
  // known transfer syntaxes are accepted. (new in Orthanc 1.9.0)
  "AcceptedTransferSyntaxes" : [ "1.2.840.10008.1.*" ],

  // User-friendly groups of transfer syntaxes that can be enabled or
  // disabled at once. These options are applied after the main
  // "AcceptedTransferSyntaxes" option has been applied (if present).
  /**
     "DeflatedTransferSyntaxAccepted"     : true,
     "JpegTransferSyntaxAccepted"         : true,
     "Jpeg2000TransferSyntaxAccepted"     : true,
     "JpegLosslessTransferSyntaxAccepted" : true,
     "JpipTransferSyntaxAccepted"         : true,
     "Mpeg2TransferSyntaxAccepted"        : true,
     "RleTransferSyntaxAccepted"          : true,
     "Mpeg4TransferSyntaxAccepted"        : true,  // New in Orthanc 1.6.0
     "H265TransferSyntaxAccepted"         : true,  // New in Orthanc 1.9.0
  **/
  
  // Whether Orthanc accepts to act as C-STORE SCP for unknown storage
  // SOP classes (aka. "promiscuous mode")
  "UnknownSopClassAccepted" : false,

  // The list of accepted Storage SOP classes.
  // If empty or not defined, this list defaults
  // to all storage classes defined in DCMTK in case of 
  // C-STORE SCP and to a reduced list of 120 common storage
  // classes in case of C-GET SCU.
  // List of DCMTK default Storage SOP Classes:
  // https://github.com/DCMTK/dcmtk/blob/410ffe2019b9db6a8f4036daac742a6f5e4d36c2/dcmdata/libsrc/dcuid.cc#L664
  // Each entry can contain wildcards ("?" or "*") to add
  // subsets of SOP classes that are defined in DCMTK defaults.
  // "?" accepts any single character at that position.
  // "*" accepts any string value at that position.
  // If you want to add a a SOP class that is not defined in
  // DCMTK defaults, you must add it explicitly.
  // (new in Orthanc 1.12.6)
  // Example to add a non standard class
  // and keep the default ones:
  // "AcceptedSopClasses" : [
  //   "1.3.12.2.1107.5.9.1",
  //   "1.2.840.*"
  // ]
  // Example to limit to 2 SOP Classes:
  // "AcceptedSopClasses" : [
  //   "1.2.840.10008.5.1.4.1.1.2",
  //   "1.2.840.10008.5.1.4.1.1.4"
  // ]

  // The list of rejected Storage SOP classes.
  // This configuration is only meaningful if
  // "AcceptedSopClasses" is using regular expressions
  // or if it is not defined.
  // Each entry can contain wildcards ("?" or "*").
  // (new in Orthanc 1.12.6)
  // "RejectedSopClasses" : [
  //   "1.2.840.10008.5.1.4.1.1.2",
  //   "1.2.840.10008.5.1.4.1.1.4"
  // ]

  // Set the timeout (in seconds) after which the DICOM associations
  // are closed by the Orthanc SCP (server) if no further DIMSE
  // command is received from the SCU (client).
  // A value of 0 means "no timeout".
  "DicomScpTimeout" : 30,



  /**
   * Security-related options for the HTTP server
   **/

  // Whether remote hosts can connect to the HTTP server
  "RemoteAccessAllowed" : false,

  // Whether or not SSL is enabled
  "SslEnabled" : false,

  // Path to the SSL certificate used by the HTTP server. The file
  // must be stored in the PEM format, and must contain both the
  // certificate and the private key. This option is only meaningful
  // if "SslEnabled" is true.
  "SslCertificate" : "certificate.pem",

  // Sets the minimum accepted SSL protocol version for the HTTP server
  // (cf. "ssl_protocol_version" option of civetweb). By default,
  // require TLS 1.2 or 1.3. This option is only meaningful if "SslEnabled"
  // is true. (new in Orthanc 1.8.2)
  //
  // Value => Protocols
  //   0      SSL2+SSL3+TLS1.0+TLS1.1+TLS1.2+TLS1.3
  //   1      SSL3+TLS1.0+TLS1.1+TLS1.2+TLS1.3
  //   2      TLS1.0+TLS1.1+TLS1.2+TLS1.3
  //   3      TLS1.1+TLS1.2+TLS1.3
  //   4      TLS1.2+TLS1.3
  //   5      TLS1.3
  "SslMinimumProtocolVersion" : 4,

  // Set the accepted ciphers for SSL connections for the HTTP server. 
  // The ciphers must be provided as a list of strings. If not set, 
  // this will default to FIPS 140-2 ciphers. This option is only 
  // meaningful if "SslEnabled" is true. (new in Orthanc 1.8.2)
  /**
    "SslCiphersAccepted" : [ "AES128-GCM-SHA256" ],
  **/

  // Whether or not peer client certificates shall be checked. This
  // option is only meaningful if "SslEnabled" is true.
  "SslVerifyPeers" : false,

  // Path to a file containing the concatenation of the client SSL
  // certificate(s) that are trusted to verify the identity of remote
  // HTTP clients. The individual certificate(s) or root CAs must be 
  // stored in the PEM format. This option is only meaningful 
  // if "SslVerifyPeers" is true.  
  "SslTrustedClientCertificates" : "trustedClientCertificates.pem",
  
  // Whether or not the password protection is enabled (using HTTP
  // basic access authentication). Starting with Orthanc 1.5.8, if
  // "AuthenticationEnabled" is not explicitly set, authentication is
  // enabled iff. remote access is allowed (i.e. the default value of
  // "AuthenticationEnabled" equals that of "RemoteAccessAllowed").
  /**
     "AuthenticationEnabled" : false,
   **/

  // The list of the registered users. Because Orthanc uses HTTP
  // Basic Authentication, the passwords are stored as plain text.
  "RegisteredUsers" : {
    // "alice" : "alicePassword"
  },



  /**
   * Security-related options for the DICOM connections (SCU/SCP)
   **/

  // Whether DICOM TLS is enabled in the Orthanc SCP (new in Orthanc 1.9.0)
  "DicomTlsEnabled" : false,

  // Path to the TLS certificate file (in PEM format) to be used for
  // both Orthanc SCP (incoming DICOM connections) and Orthanc SCU
  // (outgoing DICOM connections). Note that contrarily to the
  // "SslCertificate" option, the certificate and its private key must
  // be split into two separate files. (new in Orthanc 1.9.0)
  /**
     "DicomTlsCertificate" : "orthanc.crt",
  **/

  // Path to the file containing the private key (in PEM format) that
  // corresponds to the TLS certificate specified in option
  // "DicomTlsCertificate". (new in Orthanc 1.9.0)
  /**
     "DicomTlsPrivateKey" : "orthanc.key",
  **/

  // Path to a file containing all the TLS certificates that Orthanc
  // can trust, both for its SCP (incoming DICOM connections) and SCU
  // (outgoing DICOM connections). This file must contain a sequence
  // of PEM certificates. (new in Orthanc 1.9.0)
  /**
     "DicomTlsTrustedCertificates" : "trusted.crt",
  **/
  
  // Whether Orthanc rejects DICOM TLS connections to/from remote
  // modalities that do not provide a certificate. Setting this option
  // to "true" (resp. "false") corresponds to "--require-peer-cert"
  // (resp. "--ignore-peer-cert") in the DCMTK command-line
  // tools. (new in Orthanc 1.9.3)
  // Once you set this configuration to true, you must provide a list of
  // trusted certificates in DicomTlsTrustedCertificates.
  "DicomTlsRemoteCertificateRequired" : true,

  // Sets the minimum accepted TLS protocol version for the DICOM server
  // By default, require TLS 1.2 or 1.3. This option is only meaningful 
  // if "DicomTlsEnabled" is true (new in Orthanc 1.12.4).
  // Note that, internally, Orthanc is configured to use the BCP195 profile
  // by default.  As soon as you switch to another protocol version, you
  // must also provide the list of supported cipher suites.
  // This configuration applies to Orthanc acting both as SCU and SCP.
  // Value => Protocols
  //   0      use default BCP 195 profile and default cipher suites
  //   1      SSL3+TLS1.0+TLS1.1+TLS1.2+TLS1.3
  //   2      TLS1.0+TLS1.1+TLS1.2+TLS1.3
  //   3      TLS1.1+TLS1.2+TLS1.3
  //   4      TLS1.2+TLS1.3
  //   5      TLS1.3
  "DicomTlsMinimumProtocolVersion" : 0,

  // Set the accepted ciphers for TLS connections for the DICOM server. 
  // The ciphers must be provided as a list of strings. If not set, 
  // this will default to BCP195 ciphers if DicomTlsMinimumProtocolVersion is 0
  // or to an empty list for other values. This option is only 
  // meaningful if "DicomTlsEnabled" is true. (new in Orthanc 1.12.4).
  // This configuration must be provided if DicomTlsMinimumProtocolVersion != 0.
  // The list of valid cipher names are available in 
  // https://www.openssl.org/docs/man3.3/man1/openssl-ciphers.html
  // The OpenSSL names are used.
  /**
     "DicomTlsCiphersAccepted" : []
  **/
  
  // Whether the Orthanc SCP allows incoming C-ECHO requests, even
  // from SCU modalities it does not know about (i.e. that are not
  // listed in the "DicomModalities" option above). Orthanc 1.3.0
  // is the only version to behave as if this argument were set to "false".
  "DicomAlwaysAllowEcho" : true,

  // Whether the Orthanc SCP allows incoming C-STORE requests, even
  // from SCU modalities it does not know about (i.e. that are not
  // listed in the "DicomModalities" option above)
  "DicomAlwaysAllowStore" : true,

  // Whether the Orthanc SCP allows incoming C-FIND requests, even
  // from SCU modalities it does not know about (i.e. that are not
  // listed in the "DicomModalities" option above). Setting this
  // option to "true" implies security risks. (new in Orthanc 1.9.0)
  // Note: From Orthanc 1.10.0, this option only applies to C-FIND
  // requests for patients/studies/series/instances. Use option
  // "DicomAlwaysAllowFindWorklist" for worklists.
  "DicomAlwaysAllowFind" : false,

  // Whether the Orthanc SCP allows incoming C-FIND requests for worklists, 
  // even from SCU modalities it does not know about (i.e. that are not
  // listed in the "DicomModalities" option above). Setting this
  // option to "true" implies security risks. (new in Orthanc 1.10.0)
  "DicomAlwaysAllowFindWorklist" : false,

  // Whether the Orthanc SCP allows incoming C-GET requests, even
  // from SCU modalities it does not know about (i.e. that are not
  // listed in the "DicomModalities" option above). Setting this
  // option to "true" implies security risks. (new in Orthanc 1.9.0)
  "DicomAlwaysAllowGet" : false,

  // Whether the Orthanc SCP allows incoming C-MOVE requests, even
  // from SCU modalities it does not know about (i.e. that are not
  // listed in the "DicomModalities" option above). Setting this
  // option to "true" implies security risks. (new in Orthanc 1.9.7)
  "DicomAlwaysAllowMove" : false,

  // Whether Orthanc checks the IP/hostname address of the remote
  // modality initiating a DICOM connection (as listed in the
  // "DicomModalities" option above). If this option is set to
  // "false", Orthanc only checks the AET of the remote modality.
  "DicomCheckModalityHost" : false,



  /**
   * Network topology
   **/

  // The list of the known DICOM modalities. This option is ignored if
  // "DicomModalitiesInDatabase" is set to "true", in which case you
  // must use the REST API to define modalities.
  "DicomModalities" : {
    /**
     * Uncommenting the following line would enable Orthanc to
     * connect to an instance of the "storescp" open-source DICOM
     * store (shipped in the DCMTK distribution), as started by the
     * command line "storescp 2000". The first parameter is the
     * AET of the remote modality (cannot be longer than 16 
     * characters), the second one is the remote network address,
     * and the third one is the TCP port number corresponding
     * to the DICOM protocol on the remote modality (usually 104).
     **/
    // "sample" : [ "STORESCP", "127.0.0.1", 2000 ]

    /**
     * A fourth parameter is available to enable patches for
     * specific PACS manufacturers. The allowed values are currently:
     * - "Generic" (default value),
     * - "GenericNoWildcardInDates" (to replace "*" by "" in date fields 
     *   in outgoing C-FIND requests originating from Orthanc),
     * - "GenericNoUniversalWildcard" (to replace "*" by "" in all fields
     *   in outgoing C-FIND SCU requests originating from Orthanc),
     * - "Vitrea",
     * - "GE" (Enterprise Archive, MRI consoles and Advantage Workstation
     *   from GE Healthcare).
     *
     * This parameter is case-sensitive.
     **/
    // "vitrea" : [ "VITREA", "192.168.1.1", 104, "Vitrea" ]

    /**
     * By default, the Orthanc SCP accepts all DICOM commands (C-ECHO,
     * C-STORE, C-FIND, C-MOVE, C-GET and storage commitment) issued by the
     * registered remote SCU modalities. Starting with Orthanc 1.5.0,
     * it is possible to specify which DICOM commands are allowed,
     * separately for each remote modality, using the syntax
     * below.
     *
     * The "AllowEcho" (resp.  "AllowStore") option only has an effect
     * respectively if global option "DicomAlwaysAllowEcho"
     * (resp. "DicomAlwaysAllowStore") is set to "false".
     *
     * Starting with Orthanc 1.7.0, "AllowTranscoding" can be used to
     * disable the transcoding to uncompressed transfer syntaxes if
     * this remote modality doesn't support compressed transfer
     * syntaxes. This option currently applies to Orthanc C-GET SCP
     * and to Orthanc C-STORE SCU. This option only has an effect if
     * the global option "EnableTranscoding" is set to "true".
     *
     * By default, all "Allow*" options are true.
     * "AllowStorageCommitment" is actually an alias for 
     * "AllowNAction" & "AllowEventReport".
     * 
     * The "UseDicomTls" option specifies whether DICOM TLS should be
     * used when opening a SCU connection from Orthanc to this remote
     * modality. By default, DICOM TLS is not enabled.
     *
     * The "LocalAet" option allows one to overwrite the global
     * "DicomAet" configuration option in order to specify another AET
     * for Orthanc when initiating an SCU to this very specific
     * modality. Similarly, "Timeout" allows one to overwrite the
     * global value "DicomScuTimeout" on a per-modality basis.
     *
     * The "RetrieveMethod" option allows one to overwrite the global
     * "DicomDefaultRetrieveMethod" configuration option for this
     * specific modality. (Allowed values: "C-MOVE" or "C-GET").
     **/
    //"untrusted" : {
    //  "AET" : "ORTHANC",
    //  "Port" : 104,
    //  "Host" : "127.0.0.1",
    //  "Manufacturer" : "Generic",
    //  "AllowEcho" : false,
    //  "AllowFind" : false,
    //  "AllowFindWorklist" : false,       // new in 1.10.0
    //  "AllowGet"  : false,
    //  "AllowMove" : false,
    //  "AllowStore" : true,
    //  "AllowStorageCommitment" : false,  // new in 1.6.0
    //  "AllowTranscoding" : true,         // new in 1.7.0
    //  "UseDicomTls" : false,             // new in 1.9.0
    //  "LocalAet" : "HELLO",              // new in 1.9.0
    //  "Timeout" : 60,                    // new in 1.9.1
    //  "RetrieveMethod": "C-MOVE"         // new in 1.12.6
    //}
  },

  // Whether to store the DICOM modalities in the Orthanc database
  // instead of in this configuration file (new in Orthanc 1.5.0)
  "DicomModalitiesInDatabase" : false,

  // Whether the C-ECHO SCU is automatically followed by a C-FIND SCU,
  // while testing the connectivity from Orthanc to a remote DICOM
  // modality. This allows one to check that the remote modality does
  // accept C-FIND requests from Orthanc (new in Orthanc 1.8.1).
  "DicomEchoChecksFind" : false,

  // Whether Orthanc uses C-MOVE or C-GET to retrieve a resource after
  // a C-Find (when calling /queries/.../retrieve).
  // This configuration can be overridden for each modality by providing
  // "RetrieveMethod" in the "DicomModalities" entry.
  // (new in Orthanc 1.12.6)
  "DicomDefaultRetrieveMethod" : "C-MOVE",

  // The timeout (in seconds) after which the DICOM associations are
  // considered as closed by the Orthanc SCU (client) if the remote
  // DICOM SCP (server) does not answer.
  // A value of 0 means "no timeout".
  "DicomScuTimeout" : 10,

  // During a C-STORE SCU request initiated by Orthanc, if the remote
  // modality doesn't support the original transfer syntax of some
  // DICOM instance, specify which transfer syntax should be preferred
  // to transcode this instance (provided the remote modality accepts
  // this syntax). In Orthanc between 1.7.0 and 1.8.2, this parameter
  // was implicitly set to "Little Endian Implicit"
  // (1.2.840.10008.1.2). In Orthanc <= 1.6.1 and in Orthanc >= 1.9.0,
  // this parameter is by default set to "Little Endian Explicit"
  // (1.2.840.10008.1.2.1). This parameter can possibly correspond to
  // a compressed transfer syntax. (new in Orthanc 1.9.0)
  "DicomScuPreferredTransferSyntax" : "1.2.840.10008.1.2.1",

  // Number of threads that are used by the embedded DICOM server.
  // This defines the number of concurrent DICOM operations that can
  // be run when Orthanc is acting as SCP. 
  // Note: This is not limiting the number of concurrent connections
  // but the number of concurrent DICOM operations.
  // E.g, with a single thread, if a C-Find is received during
  // e.g the transcoding of an incoming C-Store, the C-Find will 
  // be processed only at the end of the C-Store operation but both
  // DICOM assocations will remain active. 
  // (new in Orthanc 1.10.0, before this version, the value was 
  // fixed to 4)
  "DicomThreadsCount" : 4,

  // The list of the known Orthanc peers. This option is ignored if
  // "OrthancPeersInDatabase" is set to "true", in which case you must
  // use the REST API to define Orthanc peers.
  "OrthancPeers" : {
    /**
     * Each line gives the base URL of an Orthanc peer, possibly
     * followed by the username/password pair (if the password
     * protection is enabled on the peer).
     **/
    // "peer"  : [ "http://127.0.0.1:8043/", "alice", "alicePassword" ]
    // "peer2" : [ "http://127.0.0.1:8044/" ]

    /**
     * This is another, more advanced format to define Orthanc
     * peers. It notably allows one to specify HTTP headers, a HTTPS
     * client certificate in the PEM format (as in the "--cert" option
     * of curl), or to enable PKCS#11 authentication for smart cards.
     *
     * The "Timeout" option allows one to overwrite the global value
     * "HttpTimeout" on a per-peer basis.
     **/
    // "peer" : {
    //   "Url" : "http://127.0.0.1:8043/",
    //   "Username" : "alice",
    //   "Password" : "alicePassword",
    //   "HttpHeaders" : { "Token" : "Hello world" },
    //   "CertificateFile" : "client.crt",
    //   "CertificateKeyFile" : "client.key",
    //   "CertificateKeyPassword" : "certpass",
    //   "Pkcs11" : false,
    //   "Timeout" : 42            // New in Orthanc 1.9.1
    // }
  },

  // Whether to store the Orthanc peers in the Orthanc database
  // instead of in this configuration file (new in Orthanc 1.5.0)
  "OrthancPeersInDatabase" : false,

  // Parameters of the HTTP proxy to be used by Orthanc. If set to the
  // empty string, no HTTP proxy is used. For instance:
  //   "HttpProxy" : "192.168.0.1:3128"
  //   "HttpProxy" : "proxyUser:proxyPassword@192.168.0.1:3128"
  "HttpProxy" : "",

  // If set to "true", debug messages from libcurl will be issued
  // whenever Orthanc makes an outgoing HTTP request. This is notably
  // useful to debug HTTPS-related problems.
  "HttpVerbose" : false,

  // Set the timeout for HTTP requests issued by Orthanc (in seconds).
  "HttpTimeout" : 60,

  // Enable the verification of the peers certificates during HTTPS 
  // requests. Setting this option to false is equivalent to the 
  // "--insecure" curl option. Pay attention that setting this option 
  // to "false" results in security risks!
  // Reference: http://curl.haxx.se/docs/sslcerts.html
  "HttpsVerifyPeers" : true,

  // Path to the CA (certification authority) certificates to validate
  // peers in HTTPS requests. From curl documentation ("--cacert"
  // option): "Tells curl to use the specified certificate file to
  // verify the peers. The file may contain multiple CA
  // certificates. The certificate(s) must be in PEM format." On
  // Debian-based systems, this option can be set to
  // "/etc/ssl/certs/ca-certificates.crt".
  // Starting with Orthanc 1.12.6 and provided that Orthanc has been
  // built with libcurl > 8.2.0, when this option is empty,
  // Orthanc uses the operating system native CA store ("--ca-native"
  // option)
  "HttpsCACertificates" : "",



  /**
   * Advanced options
   **/

  // Dictionary of symbolic names for the user-defined metadata. Each
  // entry must map an unique string to an unique number between 1024
  // and 65535. Reserved values:
  //  - The Orthanc whole-slide imaging plugin uses metadata 4200
  "UserMetadata" : {
    // "Sample" : 1024
  },

  // Dictionary of symbolic names for the user-defined types of
  // attached files. Each entry must map an unique string to an unique
  // number between 1024 and 65535. Optionally, a second argument can
  // provided to specify a MIME content type for the attachment.
  "UserContentType" : {
    // "sample" : 1024
    // "sample2" : [ 1025, "application/pdf" ]
  },

  // Number of seconds without receiving any instance before a
  // patient, a study or a series is considered as stable.
  "StableAge" : 60,

  // By default, Orthanc compares AET (Application Entity Titles) in a
  // case-insensitive way. Setting this option to "true" will enable
  // case-sensitive matching.
  "StrictAetComparison" : false,

  // When the following option is "true", the MD5 of the DICOM files
  // will be computed and stored in the Orthanc database. This
  // information can be used to detect disk corruption, at the price
  // of a small performance overhead.
  "StoreMD5ForAttachments" : true,

  // The maximum number of results for a single C-FIND request at the
  // Patient, Study or Series level. Setting this option to "0" means
  // no limit.
  "LimitFindResults" : 0,

  // The maximum number of results for a single C-FIND request at the
  // Instance level. Setting this option to "0" means no limit.
  "LimitFindInstances" : 0,

  // If this option is set to "true" (default behavior until Orthanc
  // 1.3.2), Orthanc will log the resources that are exported to other
  // DICOM modalities or Orthanc peers, inside the URI
  // "/exports". Setting this option to "false" is useful to prevent
  // the index to grow indefinitely in auto-routing tasks (this is the
  // default behavior since Orthanc 1.4.0).
  "LogExportedResources" : false,

  // Enable or disable HTTP Keep-Alive (persistent HTTP
  // connections). Setting this option to "true" prevents Orthanc
  // issue #32 ("HttpServer does not support multiple HTTP requests in
  // the same TCP stream"), but can possibly slow down HTTP clients
  // that do not support persistent connections. The default behavior
  // used to be "false" in Orthanc <= 1.5.1. Setting this option to
  // "false" is also recommended if Orthanc is compiled against
  // Mongoose.
  "KeepAlive" : true,

  // Defines the Keep-Alive timeout in seconds.
  // (new in Orthanc 1.11.3)
  "KeepAliveTimeout" : 1,

  // Enable or disable Nagle's algorithm. Only taken into
  // consideration if Orthanc is compiled to use CivetWeb. Experiments
  // show that best performance can be obtained by setting both
  // "KeepAlive" and "TcpNoDelay" to "true". Beware however of
  // caveats: https://eklitzke.org/the-caveats-of-tcp-nodelay
  "TcpNoDelay" : true,

  // Number of threads that are used by the embedded HTTP server.
  "HttpThreadsCount" : 50,

  // If this option is set to "false", Orthanc will run in index-only
  // mode. The DICOM files will not be stored on the drive: Orthanc
  // only indexes the small subset of the so-called "main DICOM tags"
  // in its SQL database. Note that this option might prevent the
  // upgrade to newer versions of Orthanc. Also note that this
  // behavior might not be available with the storage area plugins.
  "StoreDicom" : true,

  // DICOM associations initiated by Lua scripts are kept open as long
  // as new DICOM commands are issued. This option sets the number of
  // seconds of inactivity to wait before automatically closing a
  // DICOM association used by Lua. If set to 0, the connection is
  // closed immediately. This option is only used in Lua scripts.
  "DicomAssociationCloseDelay" : 5,

  // Maximum number of query/retrieve DICOM requests that are
  // maintained by Orthanc. The least recently used requests get
  // deleted as new requests are issued.
  "QueryRetrieveSize" : 100,

  // When handling a C-FIND SCP request, setting this flag to "true"
  // will enable case-sensitive match for PN value representation
  // (such as PatientName). By default, the search is
  // case-insensitive, which does not follow the DICOM standard.
  "CaseSensitivePN" : false,

  // Configure PKCS#11 to use hardware security modules (HSM) and
  // smart cards when carrying on HTTPS client authentication.
  /**
     "Pkcs11" : {
       "Module" : "/usr/local/lib/libbeidpkcs11.so",
       "Module" : "C:/Windows/System32/beidpkcs11.dll",
       "Pin" : "1234",
       "Verbose" : true
     }
   **/
  
  // If set to "false", Orthanc will not load its default dictionary
  // of private tags. This might be necessary if you cannot import a
  // DICOM file encoded using the Implicit VR Endian transfer syntax,
  // and containing private tags: Such an import error might stem from
  // a bad dictionary. You can still list your private tags of
  // interest in the "Dictionary" configuration option below.
  "LoadPrivateDictionary" : true,

  // Locale to be used by Orthanc. Currently, only used if comparing
  // strings in a case-insensitive way. It should be safe to keep this
  // value undefined, which lets Orthanc autodetect the suitable locale.
  // "Locale" : "en_US.UTF-8",

  // Register a new tag in the dictionary of DICOM tags that are known
  // to Orthanc. Each line must contain the tag (formatted as 2
  // hexadecimal numbers), the value representation (2 upcase
  // characters), a nickname for the tag, possibly the minimum
  // multiplicity (> 0 with defaults to 1), possibly the maximum
  // multiplicity (0 means arbitrary multiplicity, defaults to 1), and
  // possibly the Private Creator (for private tags).
  // Note: For private tags, you should only declare the lower 8 bits
  // of the element since the higher 8 bits may vary from one file to
  // the other.
  "Dictionary" : {
    // "0014,1020" : [ "DA", "ValidationExpiryDate", 1, 1 ]
    // "00e1,c2" : [ "UI", "PET-CT Multi Modality Name", 1, 1, "ELSCINT1" ]
    // "7053,03" : [ "ST", "Original Image Filename", 1, 1, "Philips PET Private Group" ]
    // "2001,5f" : [ "SQ", "StackSequence", 1, 1, "Philips Imaging DD 001" ]
  },

  // Load a set of external DICOM dictionaries in order to replace the
  // default dictionaries. This option must contain a set of files in
  // the DCMTK format. The order of the dictionaries *is*
  // important. This option can be used to turn Orthanc into a DICONDE
  // server. (new in Orthanc 1.9.4)
  /**
     "ExternalDictionaries" : [
     "/usr/share/libdcmtk12/dicom.dic",
     "/usr/share/libdcmtk12/diconde.dic"
     ]
  **/

  // Whether to run DICOM C-MOVE operations synchronously. If set to
  // "false" (asynchronous mode), each incoming C-MOVE request results
  // in the creation of a new background job. Up to Orthanc 1.3.2, the
  // implicit behavior was to use synchronous C-MOVE ("true"). Between
  // Orthanc 1.4.0 and 1.4.2, the default behavior was set to
  // asynchronous C-MOVE ("false"). Since Orthanc 1.5.0, the default
  // behavior is back to synchronous C-MOVE ("true", which ensures
  // backward compatibility with Orthanc <= 1.3.2).
  "SynchronousCMove" : true,

  // Maximum number of completed jobs that are kept in memory. A
  // processing job is considered as complete once it is tagged as
  // "Success" or "Failure". Since Orthanc 1.5.0, a value of "0"
  // indicates to keep no job in memory (i.e. jobs are removed from
  // the history as soon as they are completed), which prevents the
  // use of some features of Orthanc (typically, synchronous mode in
  // REST API) and should be avoided for non-developers.
  "JobsHistorySize" : 10,

  // Whether to save the jobs into the Orthanc database. If this
  // option is set to "true", the pending/running/completed jobs are
  // automatically reloaded from the database if Orthanc is stopped
  // then restarted (except if the "--no-jobs" command-line argument
  // is specified). This option should be set to "false" if multiple
  // Orthanc servers are using the same database (e.g. if PostgreSQL
  // or MariaDB/MySQL is used).
  "SaveJobs" : true,

  // Specifies how Orthanc reacts when it receives a DICOM instance
  // whose SOPInstanceUID is already stored. If set to "true", the new
  // instance replaces the old one. If set to "false", the new
  // instance is discarded and the old one is kept. Up to Orthanc
  // 1.4.1, the implicit behavior corresponded to "false".
  "OverwriteInstances" : false,

  // Maximum number of ZIP/media archives that are maintained by
  // Orthanc, as a response to the asynchronous creation of archives.
  // The least recently used archives get deleted as new archives are
  // generated. This option was introduced in Orthanc 1.5.0, and has
  // no effect on the synchronous generation of archives.
  "MediaArchiveSize" : 1,

  // Performance setting to specify how Orthanc accesses the storage
  // area during find operations (C-FIND, /tools/find API route and
  // QIDO-RS in dicom-web). Three modes are available: (1) "Always"
  // allows Orthanc to read the storage area as soon as it needs an
  // information that is not present in its database (slowest mode),
  // (2) "Never" prevents Orthanc from accessing the storage area, and
  // makes it uses exclusively its database (fastest mode), and (3)
  // "Answers" allows Orthanc to read the storage area to generate its
  // answers, but not to filter the DICOM resources (balance between
  // the two modes). By default, the mode is "Always", which
  // corresponds to the behavior of Orthanc <= 1.5.0.
  "StorageAccessOnFind" : "Always",

  // Whether Orthanc monitors its metrics (new in Orthanc 1.5.4). If
  // set to "true", the metrics can be retrieved at
  // "/tools/metrics-prometheus" formetted using the Prometheus
  // text-based exposition format.
  "MetricsEnabled" : true,

  // Whether calls to URI "/tools/execute-script" is enabled. Starting
  // with Orthanc 1.5.8, this URI is disabled by default for security.
  "ExecuteLuaEnabled" : false,

  // Whether the REST API can write to the filesystem (e.g. in 
  // /instances/../export route). Starting with Orthanc 1.12.0, 
  // this URI is disabled by default for security.
  "RestApiWriteToFileSystemEnabled": false,

  // Set the timeout while serving HTTP requests by the embedded Web
  // server, in seconds. This corresponds to option
  // "request_timeout_ms" of Mongoose/Civetweb. It will set the socket
  // options "SO_RCVTIMEO" and "SO_SNDTIMEO" to the specified value.
  "HttpRequestTimeout" : 30,

  // Set the default private creator that is used by Orthanc when it
  // looks for a private tag in its dictionary (cf. "Dictionary"
  // option), or when it creates/modifies a DICOM file (new in Orthanc 1.6.0).
  "DefaultPrivateCreator" : "",

  // Maximum number of storage commitment reports (i.e. received from
  // remote modalities) to be kept in memory (new in Orthanc 1.6.0).
  "StorageCommitmentReportsSize" : 100,

  // Whether Orthanc transcodes DICOM files to an uncompressed
  // transfer syntax over the DICOM protocol, if the remote modality
  // does not support compressed transfer syntaxes (new in Orthanc 1.7.0).
  "TranscodeDicomProtocol" : true,

  // If some plugin to decode/transcode DICOM instances is installed,
  // this option specifies whether the built-in decoder/transcoder of
  // Orthanc (that uses DCMTK) is applied before or after the plugins,
  // or is not applied at all (new in Orthanc 1.7.0). The allowed
  // values for this option are "After" (default value, corresponding
  // to the behavior of Orthanc <= 1.6.1), "Before", or "Disabled".
  "BuiltinDecoderTranscoderOrder" : "After",

  // If this option is set, Orthanc will transparently transcode any
  // incoming DICOM instance to the given transfer syntax before
  // storing it into its database. Beware that this might result in
  // high CPU usage (if transcoding to some compressed transfer
  // syntax), or in higher disk consumption (if transcoding to an
  // uncompressed syntax). Also, beware that transcoding to a transfer
  // syntax with lossy compression (notably JPEG) will change the
  // "SOPInstanceUID" DICOM tag, and thus the Orthanc identifier at
  // the instance level, which might break external workflow.
  /**
     "IngestTranscoding" : "1.2.840.10008.1.2",
  **/

  // Whether ingest transcoding is applied to incoming DICOM instances
  // that have an uncompressed transfer syntax, i.e. Little Endian
  // Implicit, Little Endian Explicit or Big Endian Explicit (new in
  // Orthanc 1.8.2).
  "IngestTranscodingOfUncompressed" : true,
  
  // Whether ingest transcoding is applied to incoming DICOM instances
  // that have a compressed transfer syntax (new in Orthanc 1.8.2).
  "IngestTranscodingOfCompressed" : true,
  
  // The default compression level that is used when transcoding to one
  // of the lossy/JPEG transfer syntaxes (integer between 1 and 100).
  // This value is currently only used by the default built-in DCMTK
  // transcoder and is not provided to transcoding plugins.
  "DicomLossyTranscodingQuality" : 90,

  // Whether "fsync()" is called after each write to the storage area
  // (new in Orthanc 1.7.4). If this option is set to "true", Orthanc
  // will run more slowly, but the DICOM are guaranteed to be
  // immediately written to the disk. This option only makes sense if
  // the builtin filesystem storage area is used. It defaults to
  // "false" in Orthanc <= 1.7.3, and to "true" in Orthanc >= 1.7.4.
  "SyncStorageArea" : true,

  // If specified, on compatible systems, call "mallopt(M_ARENA_MAX,
  // ...)" while starting Orthanc. This has the same effect at setting
  // the environment variable "MALLOC_ARENA_MAX". This avoids large
  // growth in RES memory if the threads of the embedded HTTP server
  // have to allocate large chunks of memory (typically the case with
  // large DICOM files). By setting "MallocArenaMax" to "N", these
  // threads share "N" memory pools (known as "arenas"). Setting this
  // option to "0" doesn't call mallopt()", which was the behavior of
  // Orthanc <= 1.8.1.
  "MallocArenaMax" : 5,

  // Deidentify/anonymize the contents of the logs (notably C-FIND,
  // C-GET, and C-MOVE queries submitted to Orthanc) according to
  // Table E.1-1 of the DICOM standard (new in Orthanc 1.8.2).
  // Note that, the DICOM logs at TRACE level are not deidentified !
  "DeidentifyLogs" : true,

  // If "DeidentifyLogs" is true, this sets the DICOM standard to
  // follow for the deidentification/anonymization of the query
  // contents. Possible values are "2008", "2017c", "2021b" (new
  // in Orthanc 1.8.2), and "2023b" (new in Orthanc 1.12.1)
  "DeidentifyLogsDicomVersion" : "2023b",

  // Maximum length of the PDU (Protocol Data Unit) in the DICOM
  // network protocol, expressed in bytes. This value affects both
  // Orthanc SCU and Orthanc SCP. It defaults to 16KB. The allowed
  // range is [4096,131072]. (new in Orthanc 1.9.0)
  "MaximumPduLength" : 16384,

  // Arbitrary identifier of this Orthanc server when storing its
  // global properties if a custom index plugin is used. This
  // identifier is only useful in the case of multiple
  // readers/writers, in order to avoid collisions between multiple
  // Orthanc servers. If unset, this identifier is taken as a SHA-1
  // hash derived from the MAC addresses of the network interfaces,
  // and from the AET and TCP ports used by Orthanc. Manually setting
  // this option is needed in Docker/Kubernetes environments. (new in
  // Orthanc 1.9.2)
  /**
     "DatabaseServerIdentifier" : "Orthanc1",
  **/

  // Whether Orthanc protects the modification of metadata and
  // attachments using revisions, which is done using the HTTP headers
  // "ETag", "If-Match" and "If-None-Match" in the calls to the REST
  // API. This is needed to handle collisions between concurrent
  // modifications in the case of multiple writers. The database
  // back-end must support this option, which is notably *not* yet the
  // case of the built-in SQLite index. (new in Orthanc 1.9.2)
  "CheckRevisions" : false,

  // Whether Orthanc streams ZIP archive/media to the HTTP
  // client. Setting this option to "false" corresponds to the
  // behavior of Orthanc <= 1.9.3: The ZIP is first entirely written
  // to a temporary file, then sent to the client (which necessitates
  // disk space and might lead to HTTP timeouts on large archives). If
  // set to "true", the chunks of the ZIP file are progressively sent
  // as soon as one DICOM file gets compressed (new in Orthanc 1.9.4)
  "SynchronousZipStream" : true,

  // Default number of loader threads when generating Zip archive/media.
  // A value of 0 means reading and writing are performed in sequence
  // (default behaviour).  A value > 1 is meaningful only if the storage
  // is a distributed network storage (e.g object storage plugin).
  // (new experimental feature in Orthanc 1.10.0)
  "ZipLoaderThreads": 0,

  // Extra Main Dicom tags that are stored in DB together with all default
  // Main Dicom tags that are already stored.
  // see https://orthanc.uclouvain.be/book/faq/main-dicom-tags.html 
  // (new in Orthanc 1.11.0)
  // Sequences tags are not supported.
  /**
  "ExtraMainDicomTags" : {
    "Instance" : [
      "Rows",
      "Columns",
      "ImageType",
      "SOPClassUID",
      "ContentDate",
      "ContentTime",
      "FrameOfReferenceUID",
      "PixelSpacing",
      "SpecificCharacterSet",
      "BitsAllocated"
    ],
    "Series" : [],
    "Study": [],
    "Patient": []
  },
  */

  // Enables/disables warnings in the logs.
  // "true" enables a warning.  All warnings are enabled by default
  // see https://orthanc.uclouvain.be/book/faq/main-dicom-tags.html#warnings
  // (new in Orthanc 1.11.0)
  "Warnings" : {
    // A "RequestedTags" has been read from storage which is slower than
    // reading it from DB.
    // You might want to store this tag in ExtraMainDicomTags to build
    // the response faster.
    "W001_TagsBeingReadFromStorage": true,
    
    // Retrieving a list of Main dicom tags from a resource that has been
    // saved with another "ExtraMainDicomTags" configuration which means that
    // your response might be incomplete/inconsistent.
    // You should call patients|studies|series|instances/../reconstruct to rebuild
    // the DB.  You may also check for the "Housekeeper" plugin.
    "W002_InconsistentDicomTagsInDb": true,

    // Display a warning message when Orthanc and its plugins are unable
    // to decode a frame (new in Orthanc 1.12.5).
    "W003_DecoderFailure": true,

    // Display a warning when the MainDicomTagsSignature metadata has not been
    // found which means that the resource has been saved with a version prior
    // to 1.11.0.
    // You should call patients|studies|series|instances/../reconstruct to rebuild
    // the DB.  You may also check for the "Housekeeper" plugin.
    // (new in Orthanc 1.12.5)
    "W004_NoMainDicomTagsSignature": true,

    // Display a warning when a user performs a find request and requests a tag
    // from a lower resource level; e.g. when requesting "StudyDescription" at
    // Patient level.
    // (new in Orthanc 1.12.5)
    "W005_RequestingTagFromLowerResourceLevel": true,

    // Display a warning when a user performs a find request and requests a tag
    // from the DICOM Meta Header.
    // (new in Orthanc 1.12.5)
    "W006_RequestingTagFromMetaHeader": true,

    // Display a warning when a user requests a tag that can not be read from disk
    // because "StorageAccessOnFind" is set to "Never".
    // (new in Orthanc 1.12.5)
    "W007_MissingRequestedTagsNotReadFromDisk": true
  },

  // Configure Orthanc in read only mode.
  // In this mode, many Orthanc features that requires a write access to the 
  // Index DB or the disk storage won't be available at all.
  // (new in Orthanc 1.12.5)
  "ReadOnly" : false,

  // Maximum number of DCMTK transcoders that are simultaneously running
  // at any given time. A value of "0" indicates to use all the
  // available CPU logical cores. Prior to Orthanc 1.12.6, there were not limit.
  // (new in Orthanc 1.12.6)
  "MaximumConcurrentDcmtkTranscoders" : 0

}