th
1300 North 17 Street, Suite 1847
Rosslyn, VA 22209
(703) 841-3285
Fax (703) 841-3385
MINUTES
DICOM WORKING GROUP SIX
(Base Standard)
NEMA Headquarters
March 21 – 25, 2005
Members Present:
Represented by:
Agfa Healthcare
Dynamic Imaging
Eastman Kodak
GE Healthcare
IDX Systems
Konica Minolta Medical Imaging
Merge eFilm
Otech
Philips Medical Systems
Siemens Medical Solutions
Societe Francaise de Radiologie
Toshiba Medical Systems
Robert Horn – 1, 2, 3, 4, 5
Andrei Leontiev – 1, 2, 3, 4, 5(P)
Ellie Avraham – 1, 2, 3, 4
Harry Solomon – 1, 2, 3, 4, 5
Alexey Ulenov – 1, 2, 3, 4, 5
Jeff Anders – 1, 2, 3
John Fehrenbach – 1, 2, 3
Herman Oosterwijk – 1, 2, 3
Bas Revet – 1, 2, 3, 4, 5
Anand Kumar – 1, 2, 3, 4, 5
Bernard Gibaud – 1, 2, 3, 4, 5
Kevin O’Donnnell – 2, 3, 4, 5
Members Absent:
Voting Representative:
DeJarnette Research Systems
IBM Life Sciences
RadPharm
Charles Stockham
Eric Goodall
David Clunie
* = Does not count toward a quorum
Others Present:
Affiliated with:
Al Belden
Heinz Blendinger
Scot Hogan
Lawrence Tarbox
Siemens Medical Solutions – 4
Siemens Medical Solutions – 2, 3, 4
Philips RT – 4
Mallinckrodt Research Inst. – 1, 2
Working Group Six (Base Standard)
of the DICOM Standards Committee
March 21 – 25, 2005
930
Lev Weisfeiler
Howard Clark
Aware – 1, 2
NEMA Staff – 1, 2, 3, 4, 5
(1 = Monday, 2 = Tuesday, 3 = Wednesday, 4 = Thursday, 5 = Friday, P = Phone)
Presiding Officer:
1.
Rob Horn, Chair
Preliminary Events
Members identified themselves and their employers. The secretary reported that a quorum was
present.
Members approved the agenda as presented.
Members reviewed the minutes from the WG-06 meeting held at NEMA from January 10 – 14,
2005 and discovered that Mr. Solomon’s name had been misspelled. The minutes were approved
subject to the correction of this error.
2.
NEMA Staff Report
Committee Secretary Howard Clark reported that four ballots were distributed following the
January meeting of WG-06. The results of those ballots are presented below:
BALLOT#
Correction Pckt 30
Closed 2005-03-16
APPROVE
(28) all
DISAPPROVE
(1) 507
ABSTAIN
(3)
Supplement 99
Closed 2005-03-16
Supplement 100
Closed 2005-03-16
Supplement 104
Closed 2005-03-16
(28)
0
0
COMMENTS
(1) 494, (1) 506,
(1) 507, (2) 510,
(3) 511
0
(29)
0
0
3
(27)
1 Dynamic
Imaging
1
4
3.
Ballot Packages from September and November 2004
Ballot Package #30 was approved for letter ballot in January of 2005. As noted above, 28
members of the DICOM Standards Committee voted to approve all Change Items in this
package. One member voted to disapprove CP507. Comments were also submitted for those
CPs marked with an asterisks (*). Each of these comments was carefully considered, and minor,
editorial changes were made in response to them. Following this discussion, the correction
proposals listed below were unanimously approved for Final Text:

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

CP492 – Add Calculated Value to Mammography CAD SR
CP493 – Add View Modifiers to CID 4015
*CP494 – Clarification to Asynchronous Operations Window Negotiation
CP505 – Errors in Echocardiography Informative Annex
*CP506 – Issuer of Patient ID in MPPS and GP-PPS
*CP507 – Modify MWL / GP-WL for Clinical Trial Participation and Anonymization
931
Working Group Six (Base Standard)
of the DICOM Standards Committee
March 21 – 25, 2005


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4.
CP508 – Improve Consistency in Code Meanings
CP509 – Correct Error in Wall Motion Scoring Code
*CP510 – Remove Notes on IS-IS from Real World Model
*CP511 – Change Hemo Annotations from DICOM to SNOMED
Ballot Package for March
During the November 2004 meeting, members of WG-06 placed the following correction
proposals in the Voting Pack for January. During this meeting, after careful review and some
slight modifications, members voted unanimously to include them in a Letter Ballot to be
designated Ballot Package 31 that would be distributed in early-April.
 CP415 – Even Length Padding for Deflate Transfer Syntax
 CP416 – Photometric Interpretation for JPEG 2000 and MF SC IOD
 CP442 -- RT Tissue Heterogeneity Correction
 CP497 – Media Creation Status
 CP498 – Lossy Image Compression Method for Images without General Image Module
 CP499 – VM of Convolution Kernel in Enhanced CT
 CP501 – Contrast Bolus Usage Macro Should Use Enumerated Values
 CP502 – Contrast Bolus Agent Numbering
 CP503 – Sharing of Contrast Usage Functional Group Macro
 CP512 – New SOP Classes Added to PS 3.2 SOP Class Table
 CP513 – Support for Chinese Character Set in Note PS 3.5 Section 6.1.2.4
 CP514 – Fix Typo in TID 3470
 CP523 – Rename Cath Templates for Cardiovascular Use in General
 CP524 – Change “Procedure” to ”Analysis” in QVA
 CP 525 – Correct Conditions in Device Module
Note: CP500 – “Conditions on Reconstruction FOV Attributes in Enhanced CT” that originally
was in the Voting Packet was reassigned to Bas Revet for further refinement.
Members reviewed the following correction proposals and, after some modifications, agreed to
include them in the WG-06 Voting Packet for June 2005:
 CP434 – RT Dose Grid Frame Offset Vector
 CP484 – RT Brachytherapy Source Strength
 CP504 – Add Additional Contrast Agent Related Codes
 CP515 – Enhanced CT Filter Material
 CP516 – Enhanced CT Reconstruction Angle
 CP517 – Clarify Pixel Padding Value Must Not Be in Native Image
 CP518 – Identifying CT and MR Acquisitions by Raw Data References
 CP519 – CT Rescale Type for Localizers Should Not Be HU
 CP520 – More Image Derivation Codes
 CP527 – Updates from BI-RADS® Atlas
 CP528 – Encoding of Empty Functional Group Items
 CP529 – Correction NM/PET Attribute Description
 CP530 – Clarifications to PET IOD
932
Working Group Six (Base Standard)
of the DICOM Standards Committee
March 21 – 25, 2005





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

5.
CP537 – Add Purpose of Reference to GP-SPS
CP538 – Remove Reference to Private Query Info Models
CP539 – Update Route of Administration Code
CP540 – Correct Duplicate TID Assignments
CP541 – Add Purpose Code for Attenuation Correction
CP542 – More Anatomical Terms for Grouped Body Parts
CP543 – Correction Radiation Dose Attributes Link
CP544 – Correction Exposed Area Attribute Unit
CP545 – Mammography CAD Relations Correction
CP546 – Clarify Specific Character Set Usage in C-FIND
Old Change Proposals
The following correction proposals were reviewed, refined and dispatched as noted:
 CP250 – Addition of Status Modifier Attribute to MPPS – Withdrawn.
 CP272 – Addition of Attribute to Distinguish Change/Add Cases in MPPS –
Withdrawn.
 CP363 – Addition of attribute to MPPS for Group Study UID
Continues assigned to Al Belden for further work.
 CP495 – Add Scheduled Procedure Step Code Sequence
Continues assigned to A. Belden for further work.
 CP496 – Change Name of Procedure Code Sequence – Withdrawn.
 CP522 – Clarification of 8 bit LUT Encoding
Continues assigned to H. Oosterwijk for further work.
 CP526 – Add Original Attribute Sequence for Replaced Identifiers
Continues assigned to B. Revet for further work.
 CP547 – Add Support for Large CDROM Media
Continues assigned to R. Horn for further work.
The following change proposals were not ready for review at this meeting and were held over
for future consideration:
 CP123 – Clarification of Unknown VR Byte Order Issues.
Continues assigned to David Clunie for additional work.
 CP128 – Status Code Convention.
Continues assigned to Bas Revet for additional work.
 CP145 – Curve Data Value Representation Clarification.
Continues assigned to David Clunie for additional work.
 CP235 – Clarify NM detector start angle usage
Continues assigned to Jeff Pohlhammer for additional work.
 CP269 – Define Media Storage Services
Reassigned to Andrei Leontiev for revision
 CP296 – Eliminate Duplicate Terms and Provide Missing Definitions
Continues assigned to Harry Solomon for further work.
 CP362 – X-Ray Table Position Attribute Names Clarification
Continues assigned to Bas Revet for further work.
933
Working Group Six (Base Standard)
of the DICOM Standards Committee
March 21 – 25, 2005

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
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
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
CP375 – Correct CID 4017 – Intra-oral Anatomy Modifier
Remains assigned to Allan Farman for future work.
CP387 – Add Context Group for Information Object Types
Continues assigned to Harry Solomon for further work.
CP398 – Add Ultrasound Contrast Agents
Remains assigned to WG-12/Anand Kumar.
CP402 – Add Attributes for Ultrasound Scan Geometry
Continues assigned to WG-12/Anand Kumar for further work.
CP419 – Ultrasound Region Modes
Continues assigned to WG-12/Anand Kumar for further work.
CP430 – Additions to PS 3.16 for Cardiac Cath SR
Continues assigned to Harry Solomon for further work.
CP434 – RT Dose Grid Frame Offset Vector
Continues assigned to WG-07 for further work.
CP442 – RT Tissue Heterogeneity Correction
Continues assigned to Scot Hogan for revision.
CP450 – Correct Myocardium Mass
Continues assigned to WG-12/Anand Kumar for further work.
CP457 – Add YBR_420 for Ultrasound MPEG
Continues assigned to Harry Solomon for further work.
CP463 – Clarify That Order of Template Rows Is Significant
Continues assigned to Harry Solomon for additional work.
CP464 – Add SOP Common to the Print related N-CREATEs
Continues assigned to Rob Horn for additional work.
CP471 – Add Common Finding Template
Continues assigned to Harry Solomon.
CP473 – Correct Location of Specimen in Information Model
Continues assigned to Harry Solomon.
CP475 – Add SOP Instance Access to Relevant Patient Information Query
Re-assigned to Harry Solomon for further work.
CP484 – RT Brachytherapy Source Strength
Continues assigned to Scot Hogan.
CP490 – RT Referenced Setup Images
Continues assigned to Scot Hogan.
CP531 – Correct Context Group Number for CID 220
Continues assigned to David Clunie for additional work.
CP532 – Forbid Odd Groups Less Than 0x0008
Continues assigned to David Clunie for additional work.
CP533 – Derivation History of Pixel Data
Continues assigned to David Clunie for additional work.
CP534 – Module Usage Abbreviations
Continues assigned to David Clunie for additional work.
CP535 – Restore Mammography View Code Sequence
Continues assigned to David Clunie for additional work.
934
Working Group Six (Base Standard)
of the DICOM Standards Committee
March 21 – 25, 2005

6.
CP536 – Correct VL Image Photometric Interpretation for MPEG
Continues assigned to David Clunie for additional work.
New Change Proposals
The following new change proposals were reviewed and dispatched as noted:
File ID
CP#
Name
Assigned to
cp_anl_01
cp_br27
cp_br28
cp_br29
cp_br30
556
557
558
cp_br31
cp_bs_ka_01
cp_Correct_T
ID_4020
cp_dac_01
cp_dac_02
cp_dac_03
cp_dac_04
cp_dac_05
cp_dac_06
cp_hjo
cp_hs91
cp_hs92
cp_hs93
560
561
562
cp_hs94
cp_hs95
cp_ka_02
cp_Mammo_
CAD_SR
cp_rjh03
572
573
cp_rjh04
RT_CPDS
RT_CPNew
RT_CPOverri
de
RT_CPPlanIn
tent
RT_CPPlanR
elated
RT_CPPositi
oner
RT_CPImage
Isocenter
RT_CPImage
Position
575
548
549
550
Add Specific Characterset Attribute to the Print Related NCREATEs
Clarify Use of Multiplexed Audio for MPEG
Notes on Use of DS Value Representation for Large Arrays
Additions to RT ROI Interpreted Type
RT Override Sequence
551
RT Plan Intent
D. Murray
552
Plan-related Reference Images
D. Murray
553
RT Corrected Parameters
D. Murray
554
Isocenter position for RT Images
D. Murray
555
RT Image Position Clarification
D. Murray
559
563
564
565
566
567
568
569
570
571
574
Retire Service Episode
Usage of Modality Identification Attributes
CT Image Type Value 3 Extension
MR In-plane Phase Encoding Direction COLUMN Value
VR and VM Studies Containing Other Referenced Instances
Sequence Missing
References to Macro Tables of Enhanced MR and CT Are Wrong
Additional Value within C.8.2.1 CT Image Module Attribute
Correct TID 4020
A. Leontiev
B. Revet
B. Revet
Rejected
B. Revet
Patient Identity Removed
Spatial Locations Preserved during Processing Flag
Pixel Data Encoding Bit Order
Fiducial Shape Type Uses Illegal Characters in Defined Terms
Code Support for Teaching File and Clinical Trial Export
Clarify Index Order for Multiple Dimension Organizations
Ophthalmology Changes
Add Admission (Visit) ID to PPS and Composite IODs
Typos in QCA Templates
Allow HAS ACQ CONTEXT relationship from NUM/Change
relationship in TID 5203 to HAS PROPERTIES
Correct Referenced Waveform
Move Informative Sections from Part 4 to Part 17
LUT Data VR Correction
Mammo CAD SR Informative
D. Clunie
D. Clunie
D. Clunie
D. Clunie
Seek work item
D. Clunie
H. Oosterwijk
H. Solomon
H. Solomon
H. Solomon
935
B. Revet
A. Kumar
B. Revet
H. Solomon
H. Solomon
Rejected
Combined with
CP564
R. Horn
R. Horn
A. Ulanov
D. Murray
D. Murray
Working Group Six (Base Standard)
of the DICOM Standards Committee
March 21 – 25, 2005
7.
Supplement 43 – Ultrasound ND Storage SOP Classes
Work on this topic is temporarily on hold due to the absence of a champion.
8.
Supplement 63 – Multi-Dimensional Interchange
Not discussed at this meeting. This supplement is under active development by members of
WG-17.
9.
Supplement 74 – Radiation Therapy General Purpose Worklist Extensions and
Calculation Service Model
On behalf of DICOM’s WG-07, the document’s editor, Scott Hogan, summarized the history of
this supplement and changes in direction that it has taken over the last year. Mr. Hogan
explained that the objective for this presentation was to obtain (1) detailed comments from WG06 regarding WG-07’s progress to date and (2) guidance on several specific issues. After a short
discussion of the specific questions from WG-07 and reassurance with regard to its current
directions, members urged WG-07 to move forward along its current track.
10.
Supplement 78 – Fetal and Pediatric Echocardiography Procedure Reports
Not discussed at this meeting. This supplement is under active development by members of
WG-12.
11.
Supplement 83 – Enhanced XA & XRF Image Storage SOP Class
On behalf of WG-02, Chair Heinz Blendinger and Supplement 83 Editor Bas Revet briefed
members regarding the WG-02 response to the three sets of comments received during the public
comment period, which closed on November 8, 2004. Subsequently, they led a line-by-line
review of the entire supplement. Upon completing this review and revising the supplement to
reflect the recommendations suggested by WG-06, members unanimously voted to approve the
document’s distribution for Letter Ballot.
12.
Supplement 86 – Digital Signatures in Structured Reports
On behalf of WG-14, Chair Lawrence Tarbox summarized the history of this document’s
development. While the DICOM Standards Committee approved this work item in November of
2001, the group’s efforts to complete the work were temporarily set aside due to the press of
other urgent business. In January of 2005, the document was approved for Public Comment.
None were submitted. Accordingly, members initially focused their attention on
recommendations from WG-14 for resolving the Open Issues. Following this, Dr. Tarbox led a
detailed, line-by-line review of this draft supplement. Following that review, members
unanimously voted to approve the distribution of this supplement for Letter Ballot.
13.
Supplement 89 – Worklist and Performed Procedure Step Use Cases (Informative)
This document was sent for public comment with a closing date of December 20, 2004. Five
sets of comments (Agfa, Dimatics, GE, Hologic and Zeiss) were formally submitted to the
936
Working Group Six (Base Standard)
of the DICOM Standards Committee
March 21 – 25, 2005
secretary. Two additional sets of internal Siemens comments were sent directly to the editor. Al
Belden initiated a discussion of these comments. However, due to the number of individual
comments that were submitted, he was unable to complete the task.
One complicating factor is that IHE is working on a similar document and care must be taken to
ensure that the two are fully harmonized. Accordingly, members urged Mr. Belden to contact
the editor of IHE’s document and propose that both groups work together
14.
Supplement 94 – Radiation Dose Reporting
Heinz Blendinger, chair of the Ad Hoc working Group on Dose Reporting, which draws its
membership from WG-02, WG-06, WG-08, WG-15 and WG-21 presented, for its first reading,
an early version of this draft supplement. Members provided a considerable degree of guidance
concerning the future development of this supplement and urged Mr. Blendinger to return at the
earliest opportunity.
15.
Supplement 95 – Audit Trail Messages
This Supplement was approved as a Trial Use Draft during the June 2004 meeting of WG-06.
The results of these trials will be reviewed in June of 2005.
16.
Supplement 96 – General Purpose Worklist Step Creation
This document was issued for public comment with a closing date of March 7, 2005. It will be
reviewed for letter ballot during the group’s June meeting.
17.
Supplement 97 – CT/MR Cardiovascular Analysis Report
This document was distributed for Public Comment with a closing date of 20 December 2004.
Three sets of comments were received. On behalf of WG-01, Harry Solomon led a review of the
comments and WG-01’s response to them. Unfortunately, the subsequent discussion revealed
that some necessary information was missing and could not be corrected during the meeting.
The supplement will be reviewed again in June.
18.
Supplement 98 – Retirement of Detached, Stand-alone and Other Services
Not discussed at this meeting.
19.
Supplement 99 – Extended Negotiation of User Identity
This document was issued for letter ballot in January of 2005. It received 28 positive votes, no
negative votes, no abstentions and no comments. On behalf of WG-14 Dr. Tarbox led a quick
review of the document. After a few minor editorial changes, members unanimously voted to
approve the document for Final Text.
20.
Supplement 100 – Color Softcopy Presentation State Storage SOP Classes
Not discussed at this meeting.
937
Working Group Six (Base Standard)
of the DICOM Standards Committee
March 21 – 25, 2005
21.
Supplement 101 – HL7 Structured Document Object References
This document was approved for Public Comment in November of 2004. No comments were
received. Nevertheless, members of WG-20 held several teleconferences to review the document
and further refine it – mostly through improvements in the Informative Annex. On behalf of
WG-20, Harry Solomon presented the revised version of this document (version 16) and led a
line-by-line discussion of it. Following this review and some further refinement, members voted,
with one abstention (Siemens), to approve its distribution for Letter Ballot.
22.
Supplement 102 – Radiotherapy Extensions for ION Therapy
This supplement was distributed for Public Comment early in October of 2004, but since all
vendors are involved in the standards development effort, no comments were received.
Therefore, WG-06 launched into a detailed line-by-line review of version #7 of this document.
Members of WG-07 will make some editorial changes and inform the secretary, who will
arrange a WG-06 Tcon seeking approval for letter ballot.
23.
Supplement 103 – Real World Value Mapping SOP Class
Not discussed at this meeting.
24.
Supplement 104 – DICOM Encapsulation of PDF Objects
This document was issued for letter ballot in January of 2005. It received 27 positive votes, one
negative vote, one abstention and four comments. Herman Oosterwijk led members in a detailed
analysis and discussion of each comment. This was followed by a line-by-line review of the
entire document. After a few minor editorial changes, members voted with one abstention
(Dynamic Imaging) to approve the document for Final Text.
25.
Supplement 105 – JPEG 2000 Part 2 Multi-component Transfer Syntaxes
This supplement was sent for Public Comments following the November 2004 meeting of WG06. Three comments were received. On behalf of WG-04, Lev Weisfeiler explained how WG04 had responded to these comments and led a line-by-line review of the resulting document. In
the course of this review, several refinements were made. Subsequently, members voted
unanimously to issue the supplement for Letter Ballot.
26.
Supplement 106 – JPEG Progressive Interactive Protocol (JPIP)
On behalf of DICOM’s WG-04, John Fehrenbach led a review of this document (draft #5). The
key issue was deciding how best to deal with the patent claims asserted by Stentor and its
decision to not participate in the DICOM Standards Committee or any DICOM Working Groups.
Members decided to explain the patent situation in the list of Open Issues at the beginning of the
Supplement with an indication that it will not be possible to move beyond the public comment
phase unless the matter is resolved in the marketplace. Members, then, proceeded to conduct a
traditional review and revision of the document. Upon completion of this exercise, with one
abstention (GE HealthCare), members voted to approve the supplement’s distribution for Public
938
Working Group Six (Base Standard)
of the DICOM Standards Committee
March 21 – 25, 2005
Comment. However, due to the exceptional circumstances identified in the Open Issues section
of this document, the Public Comment period will be extended until August 1, 2005.
27.
Supplement 107 – Verification of Substance Administration & Substance Information
Query
Not discussed at this meeting. This supplement is under active development by members of
WG-06.
28.
ASTM Liaison
No report at this meeting.
29.
Publishing DICOM in XML
Lawrence Tarbox reported that new life has been breathed into the Ad Hoc Working Group on
the Publication of DICOM in XML and presented a short oral summary of its current status.
30.
New Business
No new business was introduced at this meeting.
31.
Future Meetings
The Group’s future meeting dates and locations are as follows:
 June 13 – 17, 2005 in Delft, The Netherlands.
 August 22 – 26, 2005 at NEMA.
 October 31 – November 4, 2005 at NEMA.
 January 23 – 27, 2006 at NEMA.
 March 27 – 31, 2006 at NEMA.
 June 12 – 16, 2006 in Europe or Japan or British Columbia
 August 21 – 25, 2006 at NEMA.
 October 30 – November 3, 2006 at NEMA.
Unless otherwise noted, these meetings are scheduled from 8:30 AM to 5:30 PM each day.
32.
Next Meeting Agenda
A detailed agenda for the next meeting will be prepared at a later date.
Possible topics for June include:
CPs 2 + 2 + 2
Sup74 PC 2 + 1
RT Worklist
Sup83 FT 1 + 1
Enhanced XA
Sup86 FT 2 + 2
Digital Signatures
Sup94 PC 2 + 1
Radiation Dose Report
Sup95 FT 1 + 1
Audit Trail Messages
Sup96 LB 2 + 2
GP Worklist
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Working Group Six (Base Standard)
of the DICOM Standards Committee
March 21 – 25, 2005
Sup97 LB 2 + 0 +2
Sup98 PC 2 + 2
Sup100 FT 1 + 1
Sup101 FT 1 + 0 + 1
Sup103 PC 2 + 1
Sup105 FT 1 + 1
Sup108 PC 2 + 1
Admin 1
CT/MR Cardio Report
Retirement
Color
HL7 Structured Docs
Real World Value Mapping
JPEG 2000 Multi-component
Patient Info Query for Orders
Possible topics for August include:
CPs 2 + 2 + 2
Sup63 LB 2 + 1
Multidimensional Imaging
Sup89 LB 2 + 0 + 2
Annex M
Sup102 FT 1 + 1
Ion Therapy
Sup106 LB 2 + 2
JPIP
Sup107 PC 2 + 2
Substance Administration
Admin 1
33.
Adjournment
The meeting was adjourned at 11:50 A.M. on March 25, 2005.
Reported by:
Howard E. Clark, Secretary
April 8, 2005
Reviewed by counsel:
April 18, 2005
940
Working Group Six (Base Standard)
of the DICOM Standards Committee
March 21 – 25, 2005