Submit Public Comments on Supplement 231: Adaptive Dynamic Range GSPS, by May 22, 2022

This supplement defines a new SOP Class that relaxes the requirements of the existing GSPS SOP Class for modalities in which the dynamic range varies between images or frames. This SOP class will address handling of Modality LUT in the referenced image(s) and not require the GSPS Modality LUT Module.

The rationale behind this supplement is that PS3.4 N.2.1.1 requires the per image Modality LUT be ignored in the presence of a GSPS object. This is problematic in cases such as PET or MR, in which the dynamic range of the measured values varies between images. This forces the GSPS creator to render a GSPS object for each image.

 Who can comment? All interested persons are invited to comment. Recipients of this solicitation should feel free to forward it to anyone who may be interested in this topic. There is no cost or obligation associated with commenting and DICOM membership is not required to comment. Commenters are requested to include their contact information.
 What will happen to your comments? DICOM Working Group 6 (Base Standard) and DICOM Working Group 3 (Nuclear Medicine) will review the comments and discuss their resolution. WG-06 is authorized by the DICOM Standard Committee to decide on the technical merits of the comments.
 Instructions for accessing the documents and submitting comments:

1. Download documents from the website (www.dicomstandard.org/comment)
-- or --
FTP server (ftp://medical.nema.org/MEDICAL/Dicom/Supps/PC/) under the file names:
 PDF DOCUMENT - sup231_pc.pdf
 WORD DOCUMENT - sup231_pc.docx
 PPT OVERVIEW - sup231_pc.pptx
(To facilitate the readers’ understanding of this new proposed addition to the DICOM Standard, the authors prepared a PowerPoint presentation which describes the technical issues and use cases.)

2. Submit comment(s): Send your comments to Shayna Knazik (This email address is being protected from spambots. You need JavaScript enabled to view it.) via free text or Word Document. Be sure to include the following information:
 Commenter’s name, affiliation, e-mail address.
 Comment – may be a higher-level statement or a detailed technical comment with tables, illustrations, cut-and-paste from the draft, etc.
 Proposed solution – may be a higher-level statement or a marked-up version or new text, tables, illustrations, etc.
 Line numbers associated with your comment(s).