DICOM conformance statement
This statement describes how Routes conforms to the DICOM standard (PS3.2 lays out what a conformance statement covers). It applies to every node of the current release; the central service has no DICOM interface of its own.
Overview
Section titled “Overview”Routes is a DICOM router. It receives composite instances from modalities and other systems, keeps each one on disk until every destination it is routed to has it, and sends it on. Along the way it can convert the transfer syntax, edit or de-identify the instance, and answer storage commitment. It can also act for the archives behind it: it answers queries and retrievals by asking those archives, serves a modality worklist and accepts MPPS.
Routes does not display, create or interpret images, except for DICOMweb rendered images and thumbnails. It changes an instance only when you configure it to: with tag edits, de-identification or a transfer syntax conversion.
| Network service | Sends (SCU) | Receives (SCP) |
|---|---|---|
| Storage (all storage SOP classes below) | yes | yes |
| Verification | yes | yes |
| Storage Commitment Push Model | yes, per destination | yes, per source |
| Study Root Query/Retrieve: FIND, MOVE, GET | yes, to archives | yes, per source |
| Patient Root Query/Retrieve: FIND, MOVE, GET | yes, per source | |
| Modality Worklist Information Model: FIND | yes, per source | |
| Modality Performed Procedure Step | yes, forwarding | yes, per source |
Per source and per destination services are offered only when that source or destination is set up for them.
Implementation identity
Section titled “Implementation identity”| Implementation Class UID | 2.25.335996145367572446227720019866108169375 |
| Implementation Version Name | ROUTES_<major>.<minor>.<patch>, such as ROUTES_1.0.0 |
Both are sent in every association request and acceptance, by every node, as a sender and as a receiver.
Application entities
Section titled “Application entities”Each node is one application entity, the same on every node:
- Its AE title is
ROUTESby default (Configuration › Settings › AE title). Destinations can call as another AE title. - The ports it listens on are 11112 by default, plus TLS ports when they are configured. A node can shift all of its ports by an offset, which lets several nodes share one server.
- The called AE title of an incoming association is not checked by default. A source can require particular called AE titles, and routing decisions can depend on them.
Real-world activities
Section titled “Real-world activities”- Receive and route. A sender stores instances (C-STORE). The node accepts each one once it is written to disk and queued for its destinations. Each destination’s queue then sends it (C-STORE) on its own association.
- Storage commitment. A sender asks for storage commitment. The node answers once the instances are on its disk, or once every destination of their route has accepted them, as the source is set. The node can also request storage commitment from a destination after sending to it.
- Query and retrieve. A sender queries (C-FIND) or retrieves (C-MOVE, C-GET). The node asks the archives its source is linked to and passes their answers on.
- Worklist and MPPS. A modality queries the worklist (C-FIND), which the node answers from its copy of the orders. It reports procedure steps (N-CREATE, N-SET), and the node can forward them.
- Prior studies. When a new study arrives, the node finds the patient’s earlier studies in an archive (C-FIND) and retrieves them (C-GET or C-MOVE) for the route’s destinations.
- Verification. A node answers C-ECHO, and the console can test a destination with C-ECHO.
Association policies
Section titled “Association policies”As a receiver (SCP)
Section titled “As a receiver (SCP)”| Application context | 1.2.840.10008.3.1.1.1 |
| Maximum PDU length offered | 262,144 bytes by default (Configuration › Settings) |
| Maximum PDU length used to send | as the sender offers |
| Asynchronous operations | one operation at a time; a requested window is answered with 1/1 |
| Concurrent associations | 200 per node by default |
| Idle timeout | 300 seconds by default |
| Extended negotiation | SCP/SCU role selection: the SCU role when proposed; the SCP role for storage commitment results and for C-GET’s storage sub-operations |
A node accepts an association only from a sender it has a use for:
- a source accepts it (calling AE title, called AE title, IP address and port), for storage;
- a source lets it query and retrieve, or query the worklist;
- it is an archive delivering what the node asked it to move to itself;
- or it is a destination delivering a storage commitment result.
A C-ECHO-only association is accepted from anyone, unless Restrict C-ECHO to known sources is on.
| Rejection | Result, source, reason |
|---|---|
| No route accepts the sender | permanent (1), service user (1), calling AE title not recognized (3) |
| Too many associations open on the node | transient (2), service provider presentation (3), local limit exceeded (2) |
| The node has not yet received its configuration | transient (2), service provider presentation (3), temporary congestion (1) |
Services that the sender’s source does not allow have their presentation contexts refused (abstract syntax not supported), while the rest of the association is accepted.
As a sender (SCU)
Section titled “As a sender (SCU)”| Application context | 1.2.840.10008.3.1.1.1 |
| Calling AE title | the destination’s own, else the router’s AE title |
| Maximum PDU length offered | 262,144 bytes |
| Associations per destination | 2 per node by default |
| Asynchronous operations window | 1 by default. A destination can set more outstanding C-STOREs, negotiated with the Asynchronous Operations Window. |
| Retry | a failed association is retried with growing pauses, and the instances wait on disk |
Storage
Section titled “Storage”Storage SCP
Section titled “Storage SCP”The node accepts every storage SOP class in the table below, together with Verification, the Storage Commitment Push Model, and the query/retrieve, worklist and MPPS SOP classes its sources allow. With Accept unknown SOP classes on (the default) it also accepts SOP classes it does not know, such as private ones. It stores them unchanged and routes them like any other instance.
The node is a level 2 (full) storage SCP: it keeps every element, including private ones, unless an edit or de-identification you configure changes it. It does not check that an instance is valid against its IOD. Instances are accepted once they are on the node’s disk and queued, and the node takes responsibility for delivering them.
| C-STORE status | Meaning |
|---|---|
0000 |
Success: stored and queued for every destination |
0124 |
Refused: no route matched the instance (its source’s header conditions) |
A700 |
Out of resources: the node’s disk is nearly full |
A900 |
The instance has no SOP Instance UID or SOP Class UID |
0110 |
Processing failure: the instance could not be read, edited or queued |
Refused instances can be kept in the node’s quarantine for diagnosis (Settings › Quarantine days; off by default).
Storage SCU
Section titled “Storage SCU”Each destination’s queue sends instances with C-STORE, in priority order. It proposes the instance’s SOP class once for each transfer syntax in the destination’s list, in a separate presentation context, so the destination’s choice cannot change the order. The instance goes out in the first syntax the destination accepts, converted if need be (see Transfer syntaxes).
| C-STORE response | What the node does |
|---|---|
Success (0000) or any warning (Bxxx, 0001, 0107, 0116) |
delivered |
Out of resources (A7xx), processing failure (0110), resource limitation (0213), cancel (FE00), or the association fails |
retried with growing pauses |
| Any other failure | a dead letter, which can be sent again from the console |
Storage SOP classes
Section titled “Storage SOP classes”212 SOP classes, as both SCP and SCU. Retired SOP classes are marked; they are accepted and sent like the others.
| SOP class | UID |
|---|---|
| Media Storage Directory Storage | 1.2.840.10008.1.3.10 |
| Computed Radiography Image Storage | 1.2.840.10008.5.1.4.1.1.1 |
| Digital X-Ray Image Storage - For Presentation | 1.2.840.10008.5.1.4.1.1.1.1 |
| Digital X-Ray Image Storage - For Processing | 1.2.840.10008.5.1.4.1.1.1.1.1 |
| Digital Mammography X-Ray Image Storage - For Presentation | 1.2.840.10008.5.1.4.1.1.1.2 |
| Digital Mammography X-Ray Image Storage - For Processing | 1.2.840.10008.5.1.4.1.1.1.2.1 |
| Digital Intra-Oral X-Ray Image Storage - For Presentation | 1.2.840.10008.5.1.4.1.1.1.3 |
| Digital Intra-Oral X-Ray Image Storage - For Processing | 1.2.840.10008.5.1.4.1.1.1.3.1 |
| Standalone Modality LUT Storage (Retired) | 1.2.840.10008.5.1.4.1.1.10 |
| Encapsulated PDF Storage | 1.2.840.10008.5.1.4.1.1.104.1 |
| Encapsulated CDA Storage | 1.2.840.10008.5.1.4.1.1.104.2 |
| Encapsulated STL Storage | 1.2.840.10008.5.1.4.1.1.104.3 |
| Encapsulated OBJ Storage | 1.2.840.10008.5.1.4.1.1.104.4 |
| Encapsulated MTL Storage | 1.2.840.10008.5.1.4.1.1.104.5 |
| Standalone VOI LUT Storage (Retired) | 1.2.840.10008.5.1.4.1.1.11 |
| Grayscale Softcopy Presentation State Storage | 1.2.840.10008.5.1.4.1.1.11.1 |
| Segmented Volume Rendering Volumetric Presentation State Storage | 1.2.840.10008.5.1.4.1.1.11.10 |
| Multiple Volume Rendering Volumetric Presentation State Storage | 1.2.840.10008.5.1.4.1.1.11.11 |
| Variable Modality LUT Softcopy Presentation State Storage | 1.2.840.10008.5.1.4.1.1.11.12 |
| Color Softcopy Presentation State Storage | 1.2.840.10008.5.1.4.1.1.11.2 |
| Pseudo-Color Softcopy Presentation State Storage | 1.2.840.10008.5.1.4.1.1.11.3 |
| Blending Softcopy Presentation State Storage | 1.2.840.10008.5.1.4.1.1.11.4 |
| XA/XRF Grayscale Softcopy Presentation State Storage | 1.2.840.10008.5.1.4.1.1.11.5 |
| Grayscale Planar MPR Volumetric Presentation State Storage | 1.2.840.10008.5.1.4.1.1.11.6 |
| Compositing Planar MPR Volumetric Presentation State Storage | 1.2.840.10008.5.1.4.1.1.11.7 |
| Advanced Blending Presentation State Storage | 1.2.840.10008.5.1.4.1.1.11.8 |
| Volume Rendering Volumetric Presentation State Storage | 1.2.840.10008.5.1.4.1.1.11.9 |
| X-Ray Angiographic Image Storage | 1.2.840.10008.5.1.4.1.1.12.1 |
| Enhanced XA Image Storage | 1.2.840.10008.5.1.4.1.1.12.1.1 |
| X-Ray Radiofluoroscopic Image Storage | 1.2.840.10008.5.1.4.1.1.12.2 |
| Enhanced XRF Image Storage | 1.2.840.10008.5.1.4.1.1.12.2.1 |
| X-Ray Angiographic Bi-Plane Image Storage (Retired) | 1.2.840.10008.5.1.4.1.1.12.3 |
| Positron Emission Tomography Image Storage | 1.2.840.10008.5.1.4.1.1.128 |
| Legacy Converted Enhanced PET Image Storage | 1.2.840.10008.5.1.4.1.1.128.1 |
| Standalone PET Curve Storage (Retired) | 1.2.840.10008.5.1.4.1.1.129 |
| X-Ray 3D Angiographic Image Storage | 1.2.840.10008.5.1.4.1.1.13.1.1 |
| X-Ray 3D Craniofacial Image Storage | 1.2.840.10008.5.1.4.1.1.13.1.2 |
| Breast Tomosynthesis Image Storage | 1.2.840.10008.5.1.4.1.1.13.1.3 |
| Breast Projection X-Ray Image Storage - For Presentation | 1.2.840.10008.5.1.4.1.1.13.1.4 |
| Breast Projection X-Ray Image Storage - For Processing | 1.2.840.10008.5.1.4.1.1.13.1.5 |
| Enhanced PET Image Storage | 1.2.840.10008.5.1.4.1.1.130 |
| Basic Structured Display Storage | 1.2.840.10008.5.1.4.1.1.131 |
| Intravascular Optical Coherence Tomography Image Storage - For Presentation | 1.2.840.10008.5.1.4.1.1.14.1 |
| Intravascular Optical Coherence Tomography Image Storage - For Processing | 1.2.840.10008.5.1.4.1.1.14.2 |
| CT Image Storage | 1.2.840.10008.5.1.4.1.1.2 |
| Enhanced CT Image Storage | 1.2.840.10008.5.1.4.1.1.2.1 |
| Legacy Converted Enhanced CT Image Storage | 1.2.840.10008.5.1.4.1.1.2.2 |
| CT Image Storage - For Processing | 1.2.840.10008.5.1.4.1.1.2.3 |
| Enhanced CT Image Storage - For Processing | 1.2.840.10008.5.1.4.1.1.2.4 |
| Legacy Converted Enhanced CT Image Storage - For Processing | 1.2.840.10008.5.1.4.1.1.2.5 |
| Nuclear Medicine Image Storage | 1.2.840.10008.5.1.4.1.1.20 |
| CT Defined Procedure Protocol Storage | 1.2.840.10008.5.1.4.1.1.200.1 |
| CT Performed Procedure Protocol Storage | 1.2.840.10008.5.1.4.1.1.200.2 |
| Protocol Approval Storage | 1.2.840.10008.5.1.4.1.1.200.3 |
| XA Defined Procedure Protocol Storage | 1.2.840.10008.5.1.4.1.1.200.7 |
| XA Performed Procedure Protocol Storage | 1.2.840.10008.5.1.4.1.1.200.8 |
| Inventory Storage | 1.2.840.10008.5.1.4.1.1.201.1 |
| Ultrasound Multi-frame Image Storage (Retired) | 1.2.840.10008.5.1.4.1.1.3 |
| Ultrasound Multi-frame Image Storage | 1.2.840.10008.5.1.4.1.1.3.1 |
| Parametric Map Storage | 1.2.840.10008.5.1.4.1.1.30 |
| MR Image Storage | 1.2.840.10008.5.1.4.1.1.4 |
| Enhanced MR Image Storage | 1.2.840.10008.5.1.4.1.1.4.1 |
| MR Spectroscopy Storage | 1.2.840.10008.5.1.4.1.1.4.2 |
| Enhanced MR Color Image Storage | 1.2.840.10008.5.1.4.1.1.4.3 |
| Legacy Converted Enhanced MR Image Storage | 1.2.840.10008.5.1.4.1.1.4.4 |
| RT Image Storage | 1.2.840.10008.5.1.4.1.1.481.1 |
| RT Physician Intent Storage | 1.2.840.10008.5.1.4.1.1.481.10 |
| RT Segment Annotation Storage | 1.2.840.10008.5.1.4.1.1.481.11 |
| RT Radiation Set Storage | 1.2.840.10008.5.1.4.1.1.481.12 |
| C-Arm Photon-Electron Radiation Storage | 1.2.840.10008.5.1.4.1.1.481.13 |
| Tomotherapeutic Radiation Storage | 1.2.840.10008.5.1.4.1.1.481.14 |
| Robotic-Arm Radiation Storage | 1.2.840.10008.5.1.4.1.1.481.15 |
| RT Radiation Record Set Storage | 1.2.840.10008.5.1.4.1.1.481.16 |
| RT Radiation Salvage Record Storage | 1.2.840.10008.5.1.4.1.1.481.17 |
| Tomotherapeutic Radiation Record Storage | 1.2.840.10008.5.1.4.1.1.481.18 |
| C-Arm Photon-Electron Radiation Record Storage | 1.2.840.10008.5.1.4.1.1.481.19 |
| RT Dose Storage | 1.2.840.10008.5.1.4.1.1.481.2 |
| Robotic Radiation Record Storage | 1.2.840.10008.5.1.4.1.1.481.20 |
| RT Radiation Set Delivery Instruction Storage | 1.2.840.10008.5.1.4.1.1.481.21 |
| RT Treatment Preparation Storage | 1.2.840.10008.5.1.4.1.1.481.22 |
| Enhanced RT Image Storage | 1.2.840.10008.5.1.4.1.1.481.23 |
| Enhanced Continuous RT Image Storage | 1.2.840.10008.5.1.4.1.1.481.24 |
| RT Patient Position Acquisition Instruction Storage | 1.2.840.10008.5.1.4.1.1.481.25 |
| RT Structure Set Storage | 1.2.840.10008.5.1.4.1.1.481.3 |
| RT Beams Treatment Record Storage | 1.2.840.10008.5.1.4.1.1.481.4 |
| RT Plan Storage | 1.2.840.10008.5.1.4.1.1.481.5 |
| RT Brachy Treatment Record Storage | 1.2.840.10008.5.1.4.1.1.481.6 |
| RT Treatment Summary Record Storage | 1.2.840.10008.5.1.4.1.1.481.7 |
| RT Ion Plan Storage | 1.2.840.10008.5.1.4.1.1.481.8 |
| RT Ion Beams Treatment Record Storage | 1.2.840.10008.5.1.4.1.1.481.9 |
| Nuclear Medicine Image Storage (Retired) | 1.2.840.10008.5.1.4.1.1.5 |
| DICOS CT Image Storage | 1.2.840.10008.5.1.4.1.1.501.1 |
| DICOS Digital X-Ray Image Storage - For Presentation | 1.2.840.10008.5.1.4.1.1.501.2.1 |
| DICOS Digital X-Ray Image Storage - For Processing | 1.2.840.10008.5.1.4.1.1.501.2.2 |
| DICOS Threat Detection Report Storage | 1.2.840.10008.5.1.4.1.1.501.3 |
| DICOS 2D AIT Storage | 1.2.840.10008.5.1.4.1.1.501.4 |
| DICOS 3D AIT Storage | 1.2.840.10008.5.1.4.1.1.501.5 |
| DICOS Quadrupole Resonance (QR) Storage | 1.2.840.10008.5.1.4.1.1.501.6 |
| Ultrasound Image Storage (Retired) | 1.2.840.10008.5.1.4.1.1.6 |
| Ultrasound Image Storage | 1.2.840.10008.5.1.4.1.1.6.1 |
| Enhanced US Volume Storage | 1.2.840.10008.5.1.4.1.1.6.2 |
| Photoacoustic Image Storage | 1.2.840.10008.5.1.4.1.1.6.3 |
| Eddy Current Image Storage | 1.2.840.10008.5.1.4.1.1.601.1 |
| Eddy Current Multi-frame Image Storage | 1.2.840.10008.5.1.4.1.1.601.2 |
| Thermography Image Storage | 1.2.840.10008.5.1.4.1.1.601.3 |
| Thermography Multi-frame Image Storage | 1.2.840.10008.5.1.4.1.1.601.4 |
| Ultrasound Waveform Storage | 1.2.840.10008.5.1.4.1.1.601.5 |
| Raw Data Storage | 1.2.840.10008.5.1.4.1.1.66 |
| Spatial Registration Storage | 1.2.840.10008.5.1.4.1.1.66.1 |
| Spatial Fiducials Storage | 1.2.840.10008.5.1.4.1.1.66.2 |
| Deformable Spatial Registration Storage | 1.2.840.10008.5.1.4.1.1.66.3 |
| Segmentation Storage | 1.2.840.10008.5.1.4.1.1.66.4 |
| Surface Segmentation Storage | 1.2.840.10008.5.1.4.1.1.66.5 |
| Tractography Results Storage | 1.2.840.10008.5.1.4.1.1.66.6 |
| Label Map Segmentation Storage | 1.2.840.10008.5.1.4.1.1.66.7 |
| Height Map Segmentation Storage | 1.2.840.10008.5.1.4.1.1.66.8 |
| Real World Value Mapping Storage | 1.2.840.10008.5.1.4.1.1.67 |
| Surface Scan Mesh Storage | 1.2.840.10008.5.1.4.1.1.68.1 |
| Surface Scan Point Cloud Storage | 1.2.840.10008.5.1.4.1.1.68.2 |
| Secondary Capture Image Storage | 1.2.840.10008.5.1.4.1.1.7 |
| Multi-frame Single Bit Secondary Capture Image Storage | 1.2.840.10008.5.1.4.1.1.7.1 |
| Multi-frame Grayscale Byte Secondary Capture Image Storage | 1.2.840.10008.5.1.4.1.1.7.2 |
| Multi-frame Grayscale Word Secondary Capture Image Storage | 1.2.840.10008.5.1.4.1.1.7.3 |
| Multi-frame True Color Secondary Capture Image Storage | 1.2.840.10008.5.1.4.1.1.7.4 |
| VL Image Storage - Trial (Retired) | 1.2.840.10008.5.1.4.1.1.77.1 |
| VL Endoscopic Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.1 |
| Video Endoscopic Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.1.1 |
| VL Microscopic Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.2 |
| Video Microscopic Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.2.1 |
| VL Slide-Coordinates Microscopic Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.3 |
| VL Photographic Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.4 |
| Video Photographic Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.4.1 |
| Ophthalmic Photography 8 Bit Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.5.1 |
| Ophthalmic Photography 16 Bit Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.5.2 |
| Stereometric Relationship Storage | 1.2.840.10008.5.1.4.1.1.77.1.5.3 |
| Ophthalmic Tomography Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.5.4 |
| Wide Field Ophthalmic Photography Stereographic Projection Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.5.5 |
| Wide Field Ophthalmic Photography 3D Coordinates Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.5.6 |
| Ophthalmic Optical Coherence Tomography En Face Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.5.7 |
| Ophthalmic Optical Coherence Tomography B-scan Volume Analysis Storage | 1.2.840.10008.5.1.4.1.1.77.1.5.8 |
| VL Whole Slide Microscopy Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.6 |
| Dermoscopic Photography Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.7 |
| Confocal Microscopy Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.8 |
| Confocal Microscopy Tiled Pyramidal Image Storage | 1.2.840.10008.5.1.4.1.1.77.1.9 |
| VL Multi-frame Image Storage - Trial (Retired) | 1.2.840.10008.5.1.4.1.1.77.2 |
| Lensometry Measurements Storage | 1.2.840.10008.5.1.4.1.1.78.1 |
| Autorefraction Measurements Storage | 1.2.840.10008.5.1.4.1.1.78.2 |
| Keratometry Measurements Storage | 1.2.840.10008.5.1.4.1.1.78.3 |
| Subjective Refraction Measurements Storage | 1.2.840.10008.5.1.4.1.1.78.4 |
| Visual Acuity Measurements Storage | 1.2.840.10008.5.1.4.1.1.78.5 |
| Spectacle Prescription Report Storage | 1.2.840.10008.5.1.4.1.1.78.6 |
| Ophthalmic Axial Measurements Storage | 1.2.840.10008.5.1.4.1.1.78.7 |
| Intraocular Lens Calculations Storage | 1.2.840.10008.5.1.4.1.1.78.8 |
| Macular Grid Thickness and Volume Report Storage | 1.2.840.10008.5.1.4.1.1.79.1 |
| Standalone Overlay Storage (Retired) | 1.2.840.10008.5.1.4.1.1.8 |
| Ophthalmic Visual Field Static Perimetry Measurements Storage | 1.2.840.10008.5.1.4.1.1.80.1 |
| Ophthalmic Thickness Map Storage | 1.2.840.10008.5.1.4.1.1.81.1 |
| Corneal Topography Map Storage | 1.2.840.10008.5.1.4.1.1.82.1 |
| Text SR Storage - Trial (Retired) | 1.2.840.10008.5.1.4.1.1.88.1 |
| Basic Text SR Storage | 1.2.840.10008.5.1.4.1.1.88.11 |
| Audio SR Storage - Trial (Retired) | 1.2.840.10008.5.1.4.1.1.88.2 |
| Enhanced SR Storage | 1.2.840.10008.5.1.4.1.1.88.22 |
| Detail SR Storage - Trial (Retired) | 1.2.840.10008.5.1.4.1.1.88.3 |
| Comprehensive SR Storage | 1.2.840.10008.5.1.4.1.1.88.33 |
| Comprehensive 3D SR Storage | 1.2.840.10008.5.1.4.1.1.88.34 |
| Extensible SR Storage | 1.2.840.10008.5.1.4.1.1.88.35 |
| Comprehensive SR Storage - Trial (Retired) | 1.2.840.10008.5.1.4.1.1.88.4 |
| Procedure Log Storage | 1.2.840.10008.5.1.4.1.1.88.40 |
| Mammography CAD SR Storage | 1.2.840.10008.5.1.4.1.1.88.50 |
| Key Object Selection Document Storage | 1.2.840.10008.5.1.4.1.1.88.59 |
| Chest CAD SR Storage | 1.2.840.10008.5.1.4.1.1.88.65 |
| X-Ray Radiation Dose SR Storage | 1.2.840.10008.5.1.4.1.1.88.67 |
| Radiopharmaceutical Radiation Dose SR Storage | 1.2.840.10008.5.1.4.1.1.88.68 |
| Colon CAD SR Storage | 1.2.840.10008.5.1.4.1.1.88.69 |
| Implantation Plan SR Storage | 1.2.840.10008.5.1.4.1.1.88.70 |
| Acquisition Context SR Storage | 1.2.840.10008.5.1.4.1.1.88.71 |
| Simplified Adult Echo SR Storage | 1.2.840.10008.5.1.4.1.1.88.72 |
| Patient Radiation Dose SR Storage | 1.2.840.10008.5.1.4.1.1.88.73 |
| Planned Imaging Agent Administration SR Storage | 1.2.840.10008.5.1.4.1.1.88.74 |
| Performed Imaging Agent Administration SR Storage | 1.2.840.10008.5.1.4.1.1.88.75 |
| Enhanced X-Ray Radiation Dose SR Storage | 1.2.840.10008.5.1.4.1.1.88.76 |
| Waveform Annotation SR Storage | 1.2.840.10008.5.1.4.1.1.88.77 |
| Standalone Curve Storage (Retired) | 1.2.840.10008.5.1.4.1.1.9 |
| Waveform Storage - Trial (Retired) | 1.2.840.10008.5.1.4.1.1.9.1 |
| 12-lead ECG Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.1.1 |
| General ECG Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.1.2 |
| Ambulatory ECG Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.1.3 |
| General 32-bit ECG Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.1.4 |
| Waveform Presentation State Storage | 1.2.840.10008.5.1.4.1.1.9.100.1 |
| Waveform Acquisition Presentation State Storage | 1.2.840.10008.5.1.4.1.1.9.100.2 |
| Hemodynamic Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.2.1 |
| Cardiac Electrophysiology Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.3.1 |
| Basic Voice Audio Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.4.1 |
| General Audio Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.4.2 |
| Arterial Pulse Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.5.1 |
| Respiratory Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.6.1 |
| Multi-channel Respiratory Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.6.2 |
| Routine Scalp Electroencephalogram Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.7.1 |
| Electromyogram Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.7.2 |
| Electrooculogram Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.7.3 |
| Sleep Electroencephalogram Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.7.4 |
| Body Position Waveform Storage | 1.2.840.10008.5.1.4.1.1.9.8.1 |
| Content Assessment Results Storage | 1.2.840.10008.5.1.4.1.1.90.1 |
| Microscopy Bulk Simple Annotations Storage | 1.2.840.10008.5.1.4.1.1.91.1 |
| RT Beams Delivery Instruction Storage - Trial (Retired) | 1.2.840.10008.5.1.4.34.1 |
| RT Brachy Application Setup Delivery Instruction Storage | 1.2.840.10008.5.1.4.34.10 |
| RT Beams Delivery Instruction Storage | 1.2.840.10008.5.1.4.34.7 |
| Hanging Protocol Storage | 1.2.840.10008.5.1.4.38.1 |
| Color Palette Storage | 1.2.840.10008.5.1.4.39.1 |
| Generic Implant Template Storage | 1.2.840.10008.5.1.4.43.1 |
| Implant Assembly Template Storage | 1.2.840.10008.5.1.4.44.1 |
| Implant Template Group Storage | 1.2.840.10008.5.1.4.45.1 |
Transfer syntaxes
Section titled “Transfer syntaxes”Accepted
Section titled “Accepted”By default the node accepts any of the syntaxes below, choosing the sender’s first choice it knows. A source can narrow this to a list, choose by its own order rather than the sender’s, refuse what is not on the list, and set other rules for particular SOP classes (see What sources accept).
| Transfer syntax | UID |
|---|---|
| Explicit VR Little Endian | 1.2.840.10008.1.2.1 |
| Implicit VR Little Endian | 1.2.840.10008.1.2 |
| JPEG 2000 Image Compression (Lossless Only) | 1.2.840.10008.1.2.4.90 |
| JPEG-LS Lossless Image Compression | 1.2.840.10008.1.2.4.80 |
| JPEG Lossless, Non-Hierarchical, First-Order Prediction (Process 14, SV1) | 1.2.840.10008.1.2.4.70 |
| JPEG Lossless, Non-Hierarchical (Process 14) | 1.2.840.10008.1.2.4.57 |
| RLE Lossless | 1.2.840.10008.1.2.5 |
| High-Throughput JPEG 2000 (Lossless Only) | 1.2.840.10008.1.2.4.201 |
| High-Throughput JPEG 2000 with RPCL Options (Lossless Only) | 1.2.840.10008.1.2.4.202 |
| JPEG 2000 Part 2 Multi-component (Lossless Only) | 1.2.840.10008.1.2.4.92 |
| JPEG 2000 Image Compression | 1.2.840.10008.1.2.4.91 |
| JPEG-LS Lossy (Near-Lossless) | 1.2.840.10008.1.2.4.81 |
| JPEG Baseline (Process 1) | 1.2.840.10008.1.2.4.50 |
| JPEG Extended (Process 2 & 4) | 1.2.840.10008.1.2.4.51 |
| High-Throughput JPEG 2000 | 1.2.840.10008.1.2.4.203 |
| JPEG 2000 Part 2 Multi-component | 1.2.840.10008.1.2.4.93 |
| Deflated Explicit VR Little Endian | 1.2.840.10008.1.2.1.99 |
| Encapsulated Uncompressed Explicit VR Little Endian | 1.2.840.10008.1.2.1.98 |
| Explicit VR Big Endian (retired) | 1.2.840.10008.1.2.2 |
| MPEG2 Main Profile / Main Level | 1.2.840.10008.1.2.4.100 |
| MPEG2 Main Profile / High Level | 1.2.840.10008.1.2.4.101 |
| MPEG-4 AVC/H.264 High Profile / Level 4.1 | 1.2.840.10008.1.2.4.102 |
| MPEG-4 AVC/H.264 BD-compatible High Profile / Level 4.1 | 1.2.840.10008.1.2.4.103 |
| MPEG-4 AVC/H.264 High Profile / Level 4.2 for 2D Video | 1.2.840.10008.1.2.4.104 |
| MPEG-4 AVC/H.264 High Profile / Level 4.2 for 3D Video | 1.2.840.10008.1.2.4.105 |
| MPEG-4 AVC/H.264 Stereo High Profile / Level 4.2 | 1.2.840.10008.1.2.4.106 |
| HEVC/H.265 Main Profile / Level 5.1 | 1.2.840.10008.1.2.4.107 |
| HEVC/H.265 Main 10 Profile / Level 5.1 | 1.2.840.10008.1.2.4.108 |
Other presentation contexts (verification, storage commitment, query/retrieve, worklist, MPPS) take the sender’s first choice from the same list.
A destination receives the syntaxes in its list, most preferred first. By default the list is as received, then Explicit VR Little Endian, then Implicit VR Little Endian.
| Choice | UID | Converts to it |
|---|---|---|
| As received | the instance’s own | no conversion |
| Explicit VR Little Endian | 1.2.840.10008.1.2.1 |
yes |
| Implicit VR Little Endian | 1.2.840.10008.1.2 |
yes |
| JPEG 2000 Lossless | 1.2.840.10008.1.2.4.90 |
yes |
| JPEG-LS Lossless | 1.2.840.10008.1.2.4.80 |
yes |
| RLE Lossless | 1.2.840.10008.1.2.5 |
yes |
| JPEG 2000 (lossy) | 1.2.840.10008.1.2.4.91 |
only when the list allows lossy |
| JPEG Baseline (lossy, 8-bit) | 1.2.840.10008.1.2.4.50 |
only when the list allows lossy |
Lossy images are never compressed again with another lossy method. An image converted to a lossy syntax gets Lossy
Image Compression 01, with its method and ratio, as the standard requires.
Storage commitment
Section titled “Storage commitment”As SCP (offered to senders)
Section titled “As SCP (offered to senders)”A source can offer the Storage Commitment Push Model (1.2.840.10008.1.20.1) to its senders. The node accepts
N-ACTION (Request Storage Commitment, action type 1). It answers with N-EVENT-REPORT on a new association that it
opens to the requester, once every referenced instance is committed:
- When stored: on the node’s disk and queued; or
- When delivered: accepted by every destination of its route (the default).
The result goes to the requester’s address, or to the reply host, port and AE title the source sets, optionally over TLS. Instances still not committed after the timeout (60 minutes by default) are reported as failed (event type 2).
As SCU (requested from destinations)
Section titled “As SCU (requested from destinations)”A destination can be asked for storage commitment after instances are sent to it. The node sends N-ACTION on the sending association. It waits up to 10 seconds there for the N-EVENT-REPORT, then accepts it on a new association that the destination opens to the node. That association is recognized by the destination’s AE title, and only storage commitment is accepted on it. Instances the destination reports as failed can be sent again (up to twice). Those still not committed are recorded in the history as commit failed.
Query/Retrieve
Section titled “Query/Retrieve”As SCP
Section titled “As SCP”A source can let its senders query and retrieve (May query and retrieve). The node then accepts:
| SOP class | UID |
|---|---|
| Patient Root Query/Retrieve – FIND | 1.2.840.10008.5.1.4.1.2.1.1 |
| Patient Root Query/Retrieve – MOVE | 1.2.840.10008.5.1.4.1.2.1.2 |
| Patient Root Query/Retrieve – GET | 1.2.840.10008.5.1.4.1.2.1.3 |
| Study Root Query/Retrieve – FIND | 1.2.840.10008.5.1.4.1.2.2.1 |
| Study Root Query/Retrieve – MOVE | 1.2.840.10008.5.1.4.1.2.2.2 |
| Study Root Query/Retrieve – GET | 1.2.840.10008.5.1.4.1.2.2.3 |
The node holds no images to query, so it acts as a proxy:
- C-FIND is passed to the source’s archives in parallel. Their matches are returned as they come, each study, series or instance once, with the router as the Retrieve AE Title. Matching is the archives’ own; relational queries work if the archives support them.
- C-MOVE retrieves from the first archive that has the instances. The move destination must be the called AE title
of a configured destination; otherwise the status is
A801. The instances are queued for that destination with its edits and de-identification, and sub-operations count as completed once they are queued. - C-GET retrieves from an archive through the router, and sends each instance back to the requester on the same association as it arrives. The requester must propose the storage SOP classes with the SCP role, and the node grants it.
- Patient IDs are translated both ways when the source or the archive uses a patient ID map.
- When no archive can be reached the status is
C000(unable to process). Every query and retrieval is recorded in the audit log.
As SCU
Section titled “As SCU”Archives are destinations marked as archives. The node queries them with the Study Root model (C-FIND) and retrieves from them in one of two ways:
- C-GET (Study Root, the default): the archive returns the instances on the same association, and the node takes the SCP role for them;
- C-MOVE (Study Root): either to the router itself, which the archive must know as a move destination, or straight to the target, when patient IDs need no translation.
Modality worklist
Section titled “Modality worklist”A source can let its senders query the worklist. The node accepts Modality Worklist Information Model – FIND
(1.2.840.10008.5.1.4.31) and answers from its copy of the orders received over HL7 (see
Modality worklist and MPPS for the matching keys). It answers when the
central service cannot be reached. Answers are encoded in UTF-8 (ISO_IR 192).
Modality Performed Procedure Step
Section titled “Modality Performed Procedure Step”A source with the worklist on accepts Modality Performed Procedure Step (1.2.840.10008.3.1.2.3.3) N-CREATE and
N-SET, unless Accept MPPS is off. Procedure steps update the worklist item they refer to. Once the node has accepted
them, it can forward them to other systems as an MPPS SCU.
Character sets
Section titled “Character sets”The node passes every Specific Character Set (0008,0005) through unchanged. It decodes and re-encodes text only when an
edit, de-identification or script changes it. Then it supports the default repertoire, ISO 8859 parts 1 to 9 and 15
(ISO_IR 100, 101, 109, 110, 144, 127, 126, 138, 148, 203), Thai (ISO_IR 166), Japanese (ISO_IR 13,
ISO 2022 IR 87, ISO 2022 IR 159), Korean (ISO 2022 IR 149), Chinese (ISO 2022 IR 58, GB18030, GBK) and UTF-8
(ISO_IR 192). Code extensions that combine several repertoires use the first non-default one. Unknown terms are
read as Latin-1, which keeps every byte intact.
Security
Section titled “Security”- DICOM TLS: nodes can listen on TLS ports and send to destinations over TLS, with TLS 1.2 or 1.3. They can require client certificates from senders (mutual authentication) and present their own to destinations. See DICOM TLS.
- Who may connect is set by the sources: calling and called AE titles, IP address ranges and ports.
- Audit: every instance received and delivered is recorded in the history, senders turned away are shown on the monitoring page, and queries and retrievals are recorded in the central audit log.
DICOMweb
Section titled “DICOMweb”Nodes can also serve DICOMweb, under /dicomweb, when it is turned on:
| Service | Endpoints |
|---|---|
| STOW-RS | POST /dicomweb/studies, POST /dicomweb/studies/{study} |
| QIDO-RS | GET /dicomweb/studies, …/studies/{study}/series, …/studies/{study}/instances, …/series/{series}/instances |
| WADO-RS | studies, series and instances; …/metadata; …/frames/{frames}; …/rendered; …/thumbnail |
STOW-RS uploads are routed like C-STOREs; each sender has its own token. QIDO-RS and WADO-RS are proxied to the archives, as C-FIND and C-GET or C-MOVE are. Destinations can also be DICOMweb services, sent to with STOW-RS. See DICOMweb.