Minute s dicom working Group Seven
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M I N U T E SDICOM Working Group Seven (Radiation Therapy) June 16 – June 19, 2008Santa Fe, NM
Presiding Officer: David Murray, Chair
The secretary reported that a quorum was present. Members reviewed and approved the agenda for this meeting. Members approved the minutes for the meeting on April 22 – 25, 2008 at MITA HQ.
Update to CP805: Uli Busch’s original CP needs to be re-introduced to complete the modifications originally intended for CP805. Uli will resurrect this by drafting a new CP. CP_FORinRTIonPlan.doc: FOR Module in Ion Plan. This corrects a ‘U’ typo in the overall module table for the FOR module in Ion Plan. CP_GeneralizeBeamDeliveryRequestIOD.doc: This adds ‘or RT Ion Plan SOP’ to the RT Beams Delivery Instruction plan references. CP_CouchParametersInDeliveryRequest.doc: This comment on Supplement 74 adds a set of table-related parameters in the delivery request. It was agreed to move forward with this CP, but with positions and displacements only (not offsets) added. Common Instance Reference Clarification: (Thursday) Scott Johnson presented a CP to remove the requirements for instance references in the mandatory Common Instance Reference Module of the Registration IOD, especially in the case where there are no referenced instances. The group decided to propose instead a clarification that this module can effectively be empty in the case where no instances are actually referenced elsewhere in the object. Bill will draft a CP to present to WG-06, and send to Bruce for discussion at the WG-06 T-con. Also, this CP will be useful for IHE-RO testing. Note: Bruce Curran is editing the documents listed above and will present them to WG-06 via T-con at the next opportunity (approximately the beginning of October).
Dave Murray and Bruce Curran reviewed the progress of IHE-RO. AAPM Meeting IHE-RO Schedule:
Test tools are available. Bruce will update the IHE-RO wiki (wiki.ihe.net). Most likely, 2007 testing will occur on Thursday-Friday of AAPM week, and the 2008 profile will be tested the following week. There were field of view and row/column transposition issues with MR data, but these have been fixed and sent to ICT. ASTRO Meeting IHE-RO Schedule: 2008 Registration will be formally demonstrated; 2007 will be re-demonstrated, and 2008 Workflow will be informally demonstrated. Bruce will find out about scheduling of booth demonstration time. Currently there are no IHE-RO related requirements for WG7 work. The most likely upcoming need is development of treatment intent, should IHE-RO wish to demonstrate treatment prescription workflow.
Note: Current status of documents pertaining to Second-generation objects can be found in Annex A. MONDAY RT Dose: Bob Philbin presented V5 of the RT Dose Image IOD:
Bob updated for discussion on Wednesday. RT Physician Intent: Uli presented V8 of the document, containing changes since the recent T-cons. In particular, he reviewed Bruce’s proposed use cases
TUESDAY (7:30 a.m. start) RT Physician Intent: Uli continued review of the use cases, especially how essentially free-form prescriptive text can be coded, as well as more specific text fields for specific aspects of the prescription. Uli will use the Content Item Macro to enable coding of these attributes as free form text or coded terminology. Colin then reviewed the constraints of a specific RTOG protocol to ensure that they can be addressed by the RT Physician Intent ROI. The list of open items for this part of the proposed standard was updated. Bruce will work with Sunita to schedule a T-con (after 4 July) with IHE-RO Planning Committee members to discuss prescription use cases. A RT Physician Intent T-con will be held Tuesday August 12, at 1800 GMT (14:00 Eastern Time). Subgroup members: Bruce, Stuart (active?), John, Colin, Walter, Scott Johnson. E-R Modeling: Bill presented a discussion of the relationship between a ‘conceptual anatomic structure’ a.k.a. ‘anatomy reference’ (e.g. ‘liver’, with its own UID); a geometrical ROI (e.g. Segmentation IOD); and RT Segmentation Properties (such as density override, structure type, etc). After much discussion, it was agreed that an RT Segmentation Properties IOD should reference a Segmentation IOD or similar, but that a ‘anatomy reference’ such as that used in up-front prescription should not make any references, nor be referenced except perhaps by an RT Segmentation Properties instance as a historical record of the conceptual structure used when the RT Segmentation Properties instance was created. Any ‘user IOD’ (such as a RT Physician Intent IOD) will typically need to reference both an Anatomy Reference UID and an RT Segmentation Properties IOD instance. It was also considered that a ‘Relationship Macro’ could be created to provide a generic way of specifying IOD references. Uli then presented a UML-like ‘Uligram’ showing proposed relationships. Uli used a specific ‘Anatomy Reference Macro’ (UID/segmentation UID pair) for one of the key relationships, rather than a generic ‘Relationship Macro’. It was decided to revisit the need (or otherwise) for a generic reference macro when all the relationships that need to be modeled become more clear. RT Radiation Set IOD: Uli reviewed V8 of the RT Radiation Set IOD. Some minor modifications were suggested. The utility of reference dose ‘depth’ was discussed and added as an open issue. The concept of predecessors has been moved to RT Course. RT Segmentation Properties: Uli and Scott Johnson reviewed V5 of the RT Segmentation Properties IOD. In particular, the relevance of an ROI UID and its possible semantics were discussed. Also, reservations were expressed regarding specification of ‘Labeled Target Dose,’ which has been requested for tracking RTOG protocols. It was considered that these may not be sufficiently widely used to warrant inclusion. An open item was added to consult Walter Bosch regarding this. WEDNESDAY (7:30 a.m. start) Patient Position Modules: Uli reviewed V8 of the Patient Position Modules document. A long and involved discussion ensued, and some new open issues were added to the document. In particular, there were discussions regarding encoding, application and ordering of registration and patient positioning coordinates, use of IEC equipment and room-based coordinates, how far we go with specifying corrections, modifying the origin of such corrections for certain types of imaging, and what we reference against (Radiations, Patient Setups, etc). Patient Monitoring was also discussed at length, including how to specify the monitoring and what data to record and when to record it in DICOM (at the end of the monitoring period). RT Dose (revisited): Bob Philbin presented V6 of the RT Dose Image IOD. This contained changes following the previous discussion and in response to other comments from Walter. THURSDAY (7:30 a.m. start) RT Dose (revisited, continued): Bob Philbin continued presentation V6 of the RT Dose Image IOD. This contained changes following the previous discussion and in response to other comments from Walter. Bob will update following further discussions with Walter. RT Course: Uli Busch presented V9 of RT Course, and described in detail the relations between course, treatment intent, and radiation set. Dave will add a “Radiation Usage” enumerated value (simulation, dosimetric, treatment) to the Radiation ID macro. Specific Radiation IODs may choose to use the attribute in condition for specific attributes. It may also be needed at the Radiation Set Level. OTHER BUSINESS Potential Treatment Planning Lab: Bruce talked about Rhode Island Hospital’s diversity of treatment planning systems, and potential for setting up a ‘treatment planning lab’. WG-07 members indicated interest in a legally compliant vendor-neutral testing ground, object repository, availability of multiple systems, web-accessible archive/PACS, etc. Bruce will investigate further. Next Meetings: Next WG-07 meeting scheduled for Tuesday October 21- Friday October 24, 2008 (ending 12:00 Friday) in Charleston, South Carolina (change from Tampa). The following meeting is proposed for March 17-20, 2009 at NEMA (ending 12:00 Friday). One or two members will stay over to present to WG-06 the following Monday (at NEMA). Planning for Supplement Development: The second generation tasks document was updated as a group (see Annex). It was decided that for all T-cons, a meeting subdirectory be created. In general, the output of a T-con should be communicated to WG-07 in general. T-con Secretaries: A secretary is required for each and every T-con. Appropriate secretaries are Howard Clark, Bruce Curran, Walter Bosch. Are there others we can enlist? Bruce will check with IHE-RO groups to see if user community individuals can help. Organizers of T-cons will email Howard, Walter, and Bruce for allocation of a secretary. Adjournment The meeting was adjourned at 12:07on 19 June, 2008. Reported by: David Murray, Chair Howard Clark, Secretary July 23, 2008 Reviewed by counsel: July 28, 2008 Annex A: DICOM WG7 (RT) Task Assignments for Second Generation RT Objects Last Update: 23 June 2008 (D Murray)
Email Addresses Dave Murray dmurray@tomotherapy.com Bill Bennett bbennett@cmsrtp.com Harold Beunk harold.beunk@nl.nucletron.com Scott Johnson scott.l.johnson@philips.com Christof Schadt christof.schadt@brainlab.com Andrea Morgan amorgan@calypsomedical.com Uli Busch Ulrich.busch@varian.com Stuart Swerdloff sswerdloff@impac.com Michael Moyers mfmoyers@roadrunner.com Walter Bosch bosch@wustl.edu John Sarafa sarafa@cmsrtp.com Bruce Curran bcurran1@lifespan.org Scot Hogan shogan@impac.com Johannes Stahl johannes.stahl@siemens.com Colin Sims csims@accuray.com Bob Philbin bphilbin@tomotherapy.com Bob Pekarek bpekarek@tomotherapy.com Ulrich Beifuß ulrich.beifuss@brainlab.com Jaap Pijpelink jaap.pijpelink@nl.nucletron.com Michael Baumann baumann@optivus.com John Weston jweston@impac.com Tony Apicella aapicella@viewray.com
____________________________ WG-07 (Radiation Therapy) of the DICOM Standards Committee June 16-19, 2008 Yüklə 129,24 Kb. Dostları ilə paylaş:
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