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Task Group No. 218 - Tolerance Levels and Methodologies for IMRT Verification QA AAPM Members, Affiliates and Non-Member Affiliates - Login for access to additional information Charge To review literature and reports containing data on the achieved agreement between measurements and calculations for fixed-gantry IMRT, Tomotherapy, and VMAT techniques. To review measurement methods commonly employed, composite of all beams-actual parameters, composite perpendicular, and beam-by-beam perpendicular. Discuss pros and cons of each. To review single-point (small-averaged volume), 1D and 2D analysis methodologies for absolute dose verification with ion-chamber and the more complex 2D detector arrays, mainly performed with dose differences comparison, distance-to-agreement (DTA) comparison between measured and calculated dose distributions, and a combination of these two metrics (gamma method). To investigate the dose-difference/DTA and gamma verification metrics, their use and vendor-implementation variability, including the choice of various parameters (normalization method, choice of dose thresholding, points shift) used to perform the analysis. Bylaws: Not Referenced.Rules: Not Referenced. Approved Date(s) Start: 5/10/2011 End: 12/31/2013 Committee Keywords: TG218 Board of Directors  [Status] Science Council  [Status] Therapy Physics  [Status] Quality Assurance and Outcome Improvement SC  [Status] Working Group on Recommendations for Radiotherapy External Beam Quality Assurance  [Status] TG218 - Tolerance Levels and Methodologies for IMRT Verification QA  [Status] » Active Task Group listing

Chair Moyed Miften Task Group Chair

Members - 2013 Roster

(dates shown below are begining date of position)
There are 13 members and guests.

Hassaan Alkhatib, PhD 4/11/2012  Guest - (nonvoting)	Harold Li, PhD 11/29/2011  Member -
Daniel A. Low, PhD 8/30/2011  Member -	Moyed Miften, PhD 5/10/2011  Task Group Chair -
Dimitris N. Mihailidis, PhD 5/10/2011  Member -	Andrea Molineu, MS 5/10/2011  Member -
Jean M. Moran, PhD 5/10/2011  Member -	Arthur J. Olch, PhD 5/10/2011  Member -
Nikos Papanikolaou, PhD 5/10/2011  Member -	Todd Pawlicki, PhD 5/10/2011  Member -
Jie Shi, PhD 11/29/2011  Guest - (nonvoting)	Krishni Wijesooriya, PhD 11/29/2011  Member -
Ping Xia, PhD 5/10/2011  Member -

Staff Assigned to Committee - 2013 Roster

(dates shown below are begining date of position)

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