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Program Information

Point/Counterpoint Debate: Arc Based Techniques Will Make Conventional IMRT Obsolete

D Shepard

R Popple

P Balter

D Shepard1*, R Popple2*, P Balter3*, (1) Swedish Cancer Institute, Seattle, WA, (2) University Alabama Birmingham, Birmingham, AL, (3) UT MD Anderson Cancer Center, Houston, TX


MO-G-BRD-1 Monday 4:30PM - 6:00PM Room: Ballroom D

A variety of intensity modulated radiation therapy (IMRT) delivery techniques have been developed that have provided clinicians with the ability to deliver highly conformal dose distributions. The delivery techniques include compensators, step-and-shoot IMRT, sliding window IMRT, volumetric modulated arc therapy (VMAT), and tomotherapy. A key development in the field of IMRT was the introduction of new planning algorithms and delivery control systems in 2007 that made it possible to coordinate the gantry rotation speed, dose rate, and multileaf collimator leaf positions during the delivery of arc therapy. With these developments, VMAT became a routine clinical tool. The use of VMAT has continued to grow in recent years and some would argue that this will soon make conventional IMRT obsolete, and this is the premise of this debate. To introduce the debate, David Shepard, Ph.D. will provide an overview of IMRT delivery techniques including historical context and how they are being used today. The debate will follow with Richard Popple, Ph.D. arguing FOR the Proposition and Peter Balter, Ph.D. arguing AGAINST it.

Learning Objectives:
1. Understand the different delivery techniques for IMRT.
2. Understand the potential benefits of conventional IMRT.
3. Understand the potential benefits of arc-based IMRT delivery.


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