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Working Group on Review and Extension of the TG-61 protocol (WGTG61) AAPM Members, Affiliates and Non-Member Affiliates - Login for access to additional information Activities The goal of the working group is to provide ongoing oversight of kilovoltage x-ray beam reference dosimetry. This will include monitoring current literature and identifying where new guidance or additional data are warranted to facilitate accurate dosimetry measurements. Specific considerations will be given to the calibration practices within the Accredited Dosimetry Calibration Laboratories (ADCL) network and the suitability of reference dosimetry protocol(s) for end users. By-Laws: Not Referenced.Rules: Not Referenced. Standing? This is not a standing committee. Approved Date(s): 2/15/2026 Committee Keywords: No Keywords Entered Board of Directors Science Council Therapy Physics Cmte  [Status] Calibration Laboratory Accreditation SC  [Status] Working Group on Review and Extension of the TG-61 protocol  [Status] » Conflict of Interest report for WGTG61 » Status Reports for Task Groups - AC | EC | IC | PC | SC | Board Committees | All

Chair Wesley Culberson Workgroup 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= incomplete or out of date conflict of interest statement.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 2 voting members.

Wesley S. Culberson, PhD 2/15/2026 - 12/31/2028 Workgroup Chair

Autumn Rasmussen, MS 2/15/2026 - 12/31/2028 Work Group Vice Chair

NON-VOTING Appointments

There are 3 non-voting members and guests.

Stephen F. Kry, PhD 2/15/2026 - 12/31/2026 Consultant - MDACC Representative (nonvoting)	Jucilene Stabin 2/15/2026 - 12/31/2026 Consultant - K&S Representative (nonvoting)
Csilla I. Szabo-Foster, PhD 2/15/2026 - 12/31/2026 Consultant - NIST Representative (nonvoting)

HQ Team Appointed to Committee

There are 0 staff.

See connections to Working Group on Review and Extension of the TG-61 protocol (WGTG61)

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