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MINUTES of Teleconference
DICOM WORKING GROUP 27
Web Technologies for DICOM
Nov. 5, 2013
Members Present
Represented by
ACR/Johns Hopkins University
Agfa HealthCare
Compressus
GE Healthcare
Mallincrodt Institute of Radiology
Newport Instruments
Philips Healthcare
Toshiba Med. Research Institute, USA
James Philbin
Brad Genereaux
Laszlo Gasztonyi
Chris Lindop
Lawrence Tarbox
Robert Leif
Chris Melo
Jonathan Whitby
Members Absent
Voting Representative
Harris Healthcare Solutions
Medical Connections, Ltd
Merge Healthcare
Siemens AG – Healthcare Sector
Timothy Culp
David Harvey
William Lingley
Nikolaus Wirsz
Alternate Representatives, Observers and Others Present:
Ho, Kinson
O’Donnell, Kevin
Vastagh, Stephen
AGFA Healthcare
Toshiba
MITA Secretary
Presiding Officers:
James Philbin, Co-Chair
Brad Genereaux, Co-Chair
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Minutes - DICOM WG-27, Nov. 5, 2013
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1. Opening
The t-con was called to order at 11:00 USA Eastern Time. The Secretary called the roll. The
Agenda was approved. The minutes of the Oct. 8, 2013 t-con were reviewed; approval tabled
subject to any comments after the tcon. The approval of the minutes of the Sept. 26 meetings
were postponed to the next meeting. S. Vastagh reviewed the antitrust rules for the meeting.
2. Upcoming WG-27 meetings
The following meeting schedule was confirmed:


12/4/2013 Meeting @ RSNA, Wednesday, 9:00am – 4:00pm
1/23/2014 HL7 San Antonio (& Tcon) and Joint w/ HL7 II
The meeting schedule for 2014 will be set at the next meeting.
Future Meetings of HL7:
Jan 19-24, 2014 - San Antonio, TX
May 4-9, 2014 - Phoenix, AZ
Sept. 14-19, 2014 -Hilton Chicago Hotel, Chicago, IL
Jan. 18-22, 2015 – Hyatt Regency, San Antonio, TX
May 10-14, 2015 – Paris France
Oct. 4-9, 2015 – Sheraton Atlanta Hotel, Atlanta, GA
3. QIDO (Supplement 166)
J. Whitby, editor of the Supplement, presented <sup166_ft2_proposed.docx> which contained
revisions made based on the letter ballot comments and subsequent WG-06 comments and advice.
This file was also posted in the meeting folder.
The letter ballot comments were extensive and a few the earlier FT draft contained a few changes
that were felt to have been too far from the original LB text and would require re-balloting.
Specifically:
-
Using W3C Date / Datetime format rather than DICOM
Using Base64 encoding for a variety of number formats
Using a FHIR-like structure for Person Name attributes
These changes have been reverted. The current draft was redistributed to WG-27. One
additional comment from R. Horn was accepted (line 660.)
This text was now considered Final Text and will be so posted by J. Whitby.
R. Leif suggested solutions for Name attributes. He was advised to draft and submit a CP for
WG-27 review, which he agreed to do.
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Minutes - DICOM WG-27, Nov. 5, 2013
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4. Web Poll on WG-27 Priorities
B. Genereaux reviewed the results of the web poll for WG-27 priorities. The results have been
posted in the meeting folder.

DICOM RS Supplement
This was the highest priority item by the 16 respondents. See in meeting folder:
Reference- WG-27_Work_Item_Re-Document PS 3 18 Web Services for DICOM
v3.doc.
J. Philbin highlighted the draft Work Item: no semantics changes proposed, merely
aligning terminology, formats when differing in the last three RS Supplements.
R. Leif urged object based architecture (see description in the file posted in the meeting
folder-“Other Comments”.).
The next three projects in order of priority were:

WADO-RS rendering

UPS-RS [WI-2013-08-B]

STOW-RS Phase II
The web poll comments included:
•
An implementation guide or whitepaper on how DICOMWeb and FHIR work together.
•
Support other additional functions the current WADO-URL support. For example,
anonymization, retrieve specific ROI by specifying rows and columns, retrieve textual
objects (e.g. SR) as HTML or PDF, retrieve rendered object with markup burned in, etc.
•
Video format for the web. For example, download a US cine or XA multiframe.
•
WADO-RS to support retrieve key images only on a given study
•
Support routing / proxy or DICOMweb request in a web / http friendly way. XDS
supports WS-Addressing.
•
WG-27 needs to organize its work projects based upon objects.
•
In JIRA, there is not the idea for the moment.
•
NADO-RS (notification of changes to DICOM objects over RESTful services)
•
DICOM-RS Supplement: Unify WADO-RS, STOW-RS and QIDO-RS as well as recent
and pending CPs as a single RESTful Services for DICOM that is simpler, clearer, and
more coherent.
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Minutes - DICOM WG-27, Nov. 5, 2013
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•
MHD-I Manifest for study and series (similar to MINT metadata) ServerInfo resource to
identify capabilities of the target system (e.g. is STOW available, is QIDO available, etc.)
PNG as a first tier DICOM image encoding format
•
Might want to list FHIR Alignment for planning terms since WG-20 will likely pull WG27 in at some point.
•
Streaming of 3D images
•
Simple RESTful DMWL service NADO (notifications)
5. IHE Radiology MHD-I
B. Genereaux updated the group: IHE Radiology TC accepted the proposal. The scope was
extended; IHE TC did not want to be restrictive on the use cases. In-person IHE meeting next
week to review revised scope proposal; Brad is drafting that proposal.
6. Work Items
J Philbin presented the following Work Item Proposals. K. O’Donnell suggested to review WG06 estimates; not to underestimate time requirements.

Re-Documentation of Part 18
This was the highest priority item by the 16 respondents. See in mtg folder: WGReference: 27_Work_Item_Re-Document PS 3.18 Web Services for DICOM v3.doc.
J. Philbin highlighted the draft Work Item: The revised Part 18 would have no semantics
changes. It would be reorganized for clarity, simplicity, and brevity. Terminology would
be unified and use the terminology in the Revised HTTP/1.1 standard. Formatting would
be made to conform to the DICOM standard format.
WG-27 members may submit additional comments to J. Philbin by Nov. 14. He will post
in the DSC Dec. 5 meeting folder on Nov. 20.

PNG
The Work Item Proposal was posted as:
Reference: WG-27_Work_Item_PNG_TransferSyntax.20131105.docx>
This was previously discussed in WG-27.
WG-27 members may submit additional comments to J. Philbin by Nov. 14. He will post
in the DSC Dec. 5 meeting folder on Nov. 20.

Server Info
The Work Item Proposal was posted as:
Reference: WG-27_Work_Item_ServerInfo.20131105.doc
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Minutes - DICOM WG-27, Nov. 5, 2013
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This was previously discussed in WG-27.
WG-27 members may submit additional comments to J. Philbin by Nov. 14. He will post
in the DSC Dec. 5 meeting folder on Nov. 20.

Manifest & Bulkdata Information Object Definitions
The Work Item Proposal was posted as:
Reference: WG-27_Work_Item_Manifest_IOD v4.docx
A lengthy technical discussion followed. It was concluded that the intent is positive;
revisions are needed. The draft will be revised and redistributed to WG-27.
7. Pending CPs
a. STOW Corrections
CP draft posted in the meeting folder:
Reference: CP_xxxx_WG_27_WADO_STOW_Corrections.docx
J. Whitby will revise in response to D. McCabe’s comments.
b. Search for Patients
CP draft posted in the meeting folder:
At the last meeting, the discussion continued about the appropriateness of this search in
DICOM. It was again concluded that in spite of minimal utility there is sufficient interest
to include this functionality, but it was recognized that for real search more robust means
should be used.
Reference: CP_xxxx_WG_27_QIDO_SearchForPatient.docx
c. Metadata (reviewed at previous meeting)
d. Key Object Selection (reviewed at previous meeting)
8. UPS-RS [WI-2013-08-B]
The Group discussed starting the development of the Supplement. An Ad-Hoc Group on UPSRS was formed. All persons on the WG-27 roster are invited to join and participate.
Current expected participants:
Jim Philbin, Brad Genereaux, Kevin O’Donnell, Jonathan Whitby, Lawrence Tarbox
9. New Business
There was a discussion about creating a standard version of the DICOM IODs and related
definitions (modules, macros, data elements…) in XML that would be kept up to date by WG06, and would be available for download from the DICOM web site. Discussed that an Ad-Hoc
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Minutes - DICOM WG-27, Nov. 5, 2013
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Group of WG-06 was formed many years ago for this project. The Philips patent covering the
process of importing DICOM into toolkits was also mentioned. It was believed that the DICOM
Patent Agreement covers this patent: non-discriminatory licensing on reasonable terms.
10. Next Meetings
See Item 2 above.
In addition to the above scheduled meetings, the new Ad-Hoc group on UPS-RS is planning to
meet, on Nov. 25-26, 2013, in Toronto, Canada.
Brad Genereaux will be asked to investigate hosting the meeting in AGFA’s offices.
11. Adjournment
The t-con was adjourned at 13:10.
Reported by
Stephen Vastagh, Secretary
Reviewed by legal counsel: CRS 2013-11-14
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Minutes - DICOM WG-27, Nov. 5, 2013
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