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Task Group No. 483: Practical Measurement of Low Contrast Detectability for Modern CT Systems Using Existing CT Phantoms (TG483) AAPM Members, Affiliates and Non-Member Affiliates - Login for access to additional information Activities 1.     Determine an objective and standardized method for measuring low-contrast detectability in routine CT quality control testing, with parameter settings optimized for efficient and replicable estimate of detectability on commonly used quality control phantoms. 2.     Develop an efficient workflow for practical implementation of the method determined in Charge 1. 3.     Work with the CT imaging community to verify and validate the developed measurement protocol. By-Laws: Not Referenced.Rules: Not Referenced. Standing? This is not a standing committee. Approved Date(s): 7/6/2026 - 12/31/2029 Reviewable Draft Deadline: Committee Keywords: No Keywords Entered Board of Directors Science Council Imaging Physics Cmte  [Status] Computed Tomography SC  [Status] TG483: Practical Measurement of Low Contrast Detectability for Modern CT Systems Using Existing CT Phantoms  [Status] » Conflict of Interest report for TG483 » Status Reports for Task Groups - AC | EC | IC | PC | SC | Board Committees | All

Chair Lifeng Yu Task Group Chair

2026 Roster

(dates shown below are start and end dates of position.)

= complete and up-to-date
= up-to-date but expires soon
= incomplete or out of date conflict of interest statement.

VOTING Appointments

There are 8 voting members.

Nicholas B. Bevins, PhD 9/29/2026 - 12/31/2029 Member	Kirsten Lee Boedeker, PhD 9/29/2026 - 12/31/2029 Member
Grace Jianan Gang, PhD 9/29/2026 - 12/31/2029 Task Group Vice Chair	Dustin A. Gress, MS 9/29/2026 - 12/31/2029 Member
Cynthia H. McCollough, PhD 9/29/2026 - 12/31/2029 Member	Liqiang Ren 9/29/2026 - 12/31/2029 Member
Dufan Wu 9/29/2026 - 12/31/2029 Member	Lifeng Yu, PhD 9/29/2026 - 12/31/2029 Task Group Chair

NON-VOTING Appointments

There are 2 non-voting members and guests.

Craig Abbey 9/29/2026 - 12/31/2029 Consultant (nonvoting)

Rongping Zeng 9/29/2026 - 12/31/2029 Consultant - FDA (nonvoting)

HQ Team Appointed to Committee

There are 0 staff.

See connections to Task Group No. 483: Practical Measurement of Low Contrast Detectability for Mode

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