Program Information
Evolution of Treatment Plan Checks and Pre-Treatment QA
S Parker1*, S Stathakis2*, M Miften3*, (1) Novant Health, Winston Salem, NC, (2) Cancer Therapy and Research Center, San Antonio, TX, (3) University of Colorado School of Medicine, Aurora, CO
Presentations
MO-A-BRA|B-0 (Monday, March 20, 2017) 8:00 AM - 10:00 AM Room: Ballroom A|B
Treatment plan checks and pre-treatment QA tests are an integral part of clinical medical physics. Treatment plan checks have long been employed to ensure the correct technical delivery of the treatment plan and associated calculations. The work of Task Group 275 will be presented and include information about what the community verifies during these checks and which checks, if missed, have the largest impact on the delivery of the treatment plan. Independent second checks of the treatment plan’s calculations are frequently used to verify the integrity of the plan. Various second check algorithms will be discussed including algorithm commissioning and benchmark quality assurance. Task Group 219 recommendations on the clinical implementation of calculation programs will also be presented. Pre-treatment quality assurance for IMRT delivery will be discussed including pros and cons of measurement based QA. Gamma method practical considerations will be discussed as well as tolerance/threshold limits and achievable passing rates. Task Group 218 recommendations will also be presented.
Learning Objectives:
1. To learn the items that are checked during a treatment plan check and which have the greatest impact on treatment delivery.
2. To understand the different algorithms used for second check calculations and their pros and cons.
3. To learn how to commission and benchmark second check calculation programs.
4. To understand the pros and cons of measurement based pre-treatment IMRT QA.
5. To learn what steps should be taken when the pre-treatment IMRT QA fails.
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