AbstractID: 10077 Title: Clinical experience and recent developments in the SBRT of lung
cancer
Image-guided hypofractionated external beam radiotherapy, often referred to as
stereotactic body radiation therapy (SBRT) has become the standard of care for small
inoperable lung lesions in the past few years. The excellent success of this technique has
spawned trials comparing outcomes of SBRT to surgery. At MDACC we have been
performing SBRT treatments for inoperable lung lesions for the past 5 years, first using an
in-room CT-on-rails system and then using a Varian OBI unit with CBCT. Patients are
planned using 4DCT or breath-hold CT and treated either free breathing or during a
breath-hold. All patients are planned on Pinnacle using CT-based heterogeneity
corrections. We do not use IMRT but do allow EDW. This presentation will discuss the
imaging, planning, and treatment techniques for SBRT using both the CT-on-rails and
CBCT-based setup as well as compare free breathing vs. breath hold treatment
techniques.
Learning Objective:
1) To understand how SBRT is different from conventionally fractionated radiation
therapy.
2) To understand the challenges in treating thoracic tumors with SBRT.
3) To understand the strengths and weakness of different in-room setup techniques.
4) To understand the strengths and weakness of different respiratory management
techniques.
The author of this presentation receives finical support through sponsored research
agreements with Philips and Accuray. The author’s institution receives financial support
through a master research agreement from Varian. Equipment from all of these vendors
will be mentioned in this presentation.