Sup252
CT Image Storage for Processing
This Supplement adds For Processing storage SOP Classes based on the
existing CT Image IOD, Enhanced CT Image IOD, and Legacy Converted
Enhanced CT Image IOD.
For Processing storage SOP Classes in DICOM facilitate the exchange
and storage of images needed for processing while distinguishing them
from those for presentation.
This supports appropriate data pipelines while not disrupting reading
workflow with images not intended for presentation.
These new SOP Classes mirror existing Mammography, Intra-Oral X-ray,
and Digital X-ray For Processing SOP Classes.
One application of the For Processing SOP Classes is to store and
exchange CT basis images created by the multi-energy decomposition
process.
These are not typically diagnostic themselves, but can be processed to
generate an extensive variety of diagnostic images (iodine maps,
virtual non-contrast images, virtual monoenergetic images at various
energy levels, calcium maps, etc.).
Hanging Protocols would typically ignore these For Processing
images.
This supplement was voted ready to go out for Letter Ballot.
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Sup248
DICOMWeb Send
This supplement adds Send Transactions to DICOMweb’s
Studies and Non-Patient Instances Services to mirror the
C-MOVE operation that is already available in DIMSE.
The Send Transactions have been designed with the
intention of facilitating proxies from/to DIMSE.
This supplement was voted ready to go out for Public Comments.
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Sup251
Application Request
This Supplement adds an Application Processing Request Service to
DICOM PS3.18.
This service allows a user agent (client) to request an origin server
(Application) to perform work.
The request identifies initial data to be used as well as the
protocols which can be used to retrieve the data.
The request also specifies the protocol to be used upon completion to
store resulting artifacts.
This service is partially based on an API proposed by the American
College of Radiology’s Data Science Institute (ACR DSI) that was
extended by the MONAI Deploy Informatics Gateway (MIG) for inference
requests.
Although this service might be used to perform work identified in a
DICOM UPS-RS workitem, the interaction of this service with the
Worklist Service is not specifically defined.
This supplement will be further presented and discussed in the base
standard group before going out for Public Comments.
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Sup250
2D Total Body Photography
This supplement introduces Total Body Photography (TBP) Regional Image
Information Object Definition (IOD) for imaging of a skin
region.
TBP aims to image a person’s entire skin surface. TBP is predominantly
used for sequential screening for skin cancer, in particular melanoma,
but can also be used for the assessment of inflammatory skin diseases
such as psoriasis.
TBP may be 2D or 3D. This supplement addresses 2D TBP. 2D TBP produces
2D planar images, whereas 3D TBP produces volumetric images.
TBP uses visible light imaging. Camera movement may be manual or
automatic. There are typically multiple image acquisitions with the
patient in different positions. Multiple regional images are acquired
to image entire skin surface. TBP is often used in combination with
dermoscopy.
This supplement will be further presented and discussed in
the base standard group before going out for Public
Comments.
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Sup255
Microscopy Bulk Enhanced Annotation
This supplement will add enhancements to the annotation
mechanism in microscopy beyond the support already
available.
This supplement adds the Microscopy Bulk Enhanced
Annotation SOP Class to extend the capabilities of the
existing bulk Microscopy Bulk Simple Annotation IOD to
enable the definition of annotations that define
overlapping vector graphics with mutually exclusive
meaning.
Examples of annotations that this proposal will enable
include: heatmaps, holes/voids, and other
nested mutually exclusive concepts, e.g., tumor tissue
contained within healthy tissue.
The Microscopy Bulk Simple Annotation SOP Class and IOD
(Supplement 222) were added to the DICOM Standard to
provide a mechanism to efficiently encode machine learning
(ML) and human generated vector graphics annotations for
slide microscopy imaging. The Microscopy Bulk Simple
Annotation IOD supports vector graphic definitions of
points, lines, polylines, rectangles, ellipses, and
polygons.
This supplement was voted ready to get a supplement number
and be further discussed before going out for Public
Comment.
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Sup254
Digital Signature and Media Storage Security
This Supplement introduces cryptographic update to DICOM
Digital Signatures and Secure Media Storage by adding
support for modern algorithms while maintaining backward
compatibility.
In recent years, regulations concerning security and
privacy have become increasingly prominent across
countries and regions (e.g., EU GDPR, US FDA Cybersecurity
Guidance, China Data Security Law, Personal Information
Protection Law, and Cryptography Law). These require
strengthened confidentiality, integrity, and authenticity
of medical data.
The current Digital Signature Profiles (PS3.15 Section 6.3
and Annex C) and Media Storage Security Profiles (PS3.15
Section 6.4 and Annex D) were drafted many years ago. Some
of the legacy cryptography technologies are still being
used, e.g. 3DES and SHA-1, meanwhile, it lacks support of
the newer cryptography algorithm e.g. ECDSA/EdDSA for
digital signature, up-to-date cryptography technologies
such as authenticated encryption (e.g. AES-CCM/GCM), and
newer key management technologies such as KEM. Certificate
format used is still X.509_1993(X.509 V2) which is no
longer supported in most CA, systems and libraries, X.509
V3 is now widely used now.
The content in this supplement includes:
- Add 4 new RSA based Digital Signature Profiles by deprecating legacy algorithms such as SHA-1 and add newer algorithms such as SHA-3 family and upgrade certificate to X.509 V3.
- Add 4 new Digital Signature Profiles which are based on Elliptic Curve algorithms.
- Add one new Media Storage Security Profile, which supersedes the current mechanism in Basic Media Storage Security Profile, but use up-to-date algorithms, and add support of more key management technologies including Key Agreement (e.g., ECDH) and Key Encapsulation Mechanisms (KEM).
- Add one new Media Storage Security Profile using CMS Authenticated-Enveloped-Data with Authenticated Encryption (e.g., AES-GCM, AES-CCM).
Backward compatibility is maintained: legacy algorithms remain supported for verification/decryption.
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Sup253
Waveform Compression
This supplement proposes to:
- Add an encapsulation mechanism for DICOM waveforms to encapsulate compressed data in analogy to the existing image compression and encapsulation of compressed pixel data.
- A new Transfer Syntax for lossless compressed DICOM waveforms is added.
- A new Transfer Syntax for lossy compressed DICOM waveforms is added.
This supplement adds Transfer Syntaxes for compression of DICOM Waveforms based on ITU/VCEG codec T.261, which was created especially for encoding and decoding of biomedical waveform data.
This implies the introduction of an encapsulation mechanism for waveform sample data.
T.261 specifies an interoperable format for efficient compression, transmission, and storage of waveform signals, including biomedical waveform signals such as electrocardiography (ECG), electroencephalography (EEG), electromyography (EMG), and photoplethysmogram (PPG) data, as well as other types of general waveform data. It supports various bit depths, a broad range of sampling rates, and large numbers of channels, as required by a range of biomedical and general signal processing applications. T.261 provides for lossy, near-lossless, and lossless compression, and includes features such as optimized data blocking, indexing for rapid access and independent channel decoding, and metadata support. A draft version of the specification of T.261 is available here: VCEG-BZ02-H Spec.
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