1300 North 17th Street, Suite 900
Arlington, VA 22209, USA
+1-703-475-9217
http://dicom.nema.org
E-mail: [email protected]
Minutes-tcon-rev1
fMRI Group of the
DICOM WORKING GROUP 16
(Magnetic Resonance)
February 16, 2016
Voting Members Present2
FDA
Philips Healthcare
GE Healthcare
Siemens
Represented by
David Soltysik
Wim Corbijn
Khaleel Nadaf
Elmar Seeberger
Voting Members Not present
*ACR
*Brainlab
*Hitachi
*NIH
Represented by
John Carrino
Sven Flossmann
Sjoerd van Schie
Ron Levin
Alternate Voting Representatives, Observers, and Guests Present
Mike Fonte
Medical Numerics
Luiza Kowalczyk
DICOM SECRETARIAT/MITA
Jim Reuss
Prism Clinical Imaging
11
Revised attendance list
Voting Membership on WG-16 transfers to WG-16 Subgroups. To upgrade to Voting membership contact the
DICOM Secretariat.
2
________________________
1
fMRI Group of Working Group Sixteen (MR)
of the DICOM Standards Committee
February 16, 2016
Presiding Officer:
DICOM Secretariat/MITA
Wim Corbijn, Chair
Luiza Kowalczyk
1. Opening
The Chair called the meeting to order at 9:00 a.m. USA Eastern Time. The Secretary reminded
the participants of the antitrust rules. The Agenda was approved.
2. Supplement 189 - Functional MRI Blending Presentation State Storage
Wim provided feedback from WG-06 January meeting.
This was a continued discussion in preparation for a First Reading. W. Corbijn presented the
draft which was posted in the meeting folder as
<Sup_189_MR_Functional_MRI_Blending_Presentation_State_Storage_12 wg06.docx>
Color, color mapping:





Use first and last value mapped
Use the standard text/attributes of other LUT tables
Describe the fact that you need interpolation functions but not specify this specific
function.
Open issue: would there be a need for specific function
Identify several LUTs and see how these would fit the LUT description or could be
described shorter without full LUT table.
Threshold:
 Need to draw a diagram
 Create pipeline overview (diagram as in Sup 190, 156) of where the threshold is applied.
 Real world value – which pipeline? RWV or pixel value pipeline?
 Pixels are expected to be RWV, meaning RWV would be identity transformation.
 This has many applications beyond fMRI. Maybe the Sup 189 and the SOP Class should
be renamed (there are other areas in MRI where there are parametric maps to blend.)
 New potential title (think about it): Parametric Blending Presentation State
Strategy:
 H. Solomon asked whether an overall strategy for Presentation State is needed?
o can we put in MPR a volumetric blending?
o choosing and colorizing voxels
o coloring of parametric maps
o other things to consider in volume rendering.
________________________
2
fMRI Group of Working Group Sixteen (MR)
of the DICOM Standards Committee
February 16, 2016
o David asked whether combining Sup 156/190 with Sup 189 would be a daunting
task?
Supplement focuses on the combination of the different parametric objects. Resulting in an
image/volume of voxels that represent all the input. We have voxels in the image/volume the
actual rendering would be outside the scope of the supplement
Conclusion for Sup 189:
Reduce the sup to blending operation of multiple layers.
Create the volume that needs to be displayed
 Threshold step part of Presentation State
 Colorized volume
Review the Scope and Field of Application:
Suggestion: enumerate what this Sup IS doing instead of detailing what the Sup is NOT doing.
The Supplement will return for continued reading for PC in March, 2016.
As of today, WG-16 fMRI has a time slot for Sup 189 -PC on Friday, March 18 , 2016, 9:3010:30 USA ET. The dial-in information for each day of WG-06 meeting has been entered in the
DICOM calendar: http://workspaces.nema.org/dicom/lists/calendar/calendar.aspx
Where to begin now:
Based on the feedback of WG-06, it would be a good idea for WG-16 fMRI to start with the CP
on Color LUT’s for the parametric map.
The group needs to come up with a couple of LUTs that are often used.so that it can be seen how
to add the Color LUT to the parametric map object.
The idea is that we describe the LUT without supplying the full table if possible.
Other point was that the mapping of the floating point range is left to the implementer so we
don’t need to describe that.
Next to that Wim can start on making a drawing showing the total pipeline for presentation and
measurements.
Action ItemWim needs to follow up with David regarding the most updated version of the document.
CP-1584 -Allow Palette Color in Parametric Map
Parametric Maps should allow a default presentation using a palette color LUT.
For WG-06 discussion – how to apply to non-integer pixel values – parametric palette function
________________________
3
fMRI Group of Working Group Sixteen (MR)
of the DICOM Standards Committee
February 16, 2016
Apply as functional group in multi-frame Parametric Map
Allow reference to Palette LUT SOP Instance
The group discussed the following topics:
A.75.3 Parametric Map IOD Module Table Supplemental Palette Color Lookup Table -C - Required if Pixel Presentation (0008,,
9205) in the Parametric Map image Module equals COLOR or MIXED.
Q: Will MIXED be permitted, or should different volumes be captured in different
Parametric maps?
C.x.x Palette Color LUT Module Color LUT Descriptor Sequence - Shall be present when image pixel is Float or Double
Q: Does it need to have three different definitions or shall the range be the same for each color.
Currently this is specified this restriction is added for the integer set.
 Minimum Value
Q: Can we use Double Float for all three types of map.
3. New Business
No new business was discussed.
4. Future Meetings and Teleconferences
 T-cons:
Monday, March 7, 2016 9.00-10.30 USA ET

Meeting in person:
Not scheduled at this time
5. Adjournment
The t-con was adjourned at 10:30 USA Eastern Time.
Reported by Luiza Kowalczyk, DICOM Secretary
Reviewed by Clark Silcox, Legal Counsel
________________________
4
fMRI Group of Working Group Sixteen (MR)
of the DICOM Standards Committee
February 16, 2016