2017_SBRT_Course Book

Tumor tracking: couch compensation

Dynamic couch compensation “Keeping the tumor position fixed in space by counteracting motions of the treatment couch and irradiate with a static beam” • Advantages : Ø Free breathing Ø Linac can operate as in a static situation • Drawbacks : Ø Dynamic behavior of the couch (weight distr.) Ø Complex feedback control system for couch motion Ø Discomfort patient? Relaxing? Ø Impact on tumor motion, patient positioning? Ø Changing position of beam with respect to patient anatomy

Linac

Courtesy O. Haas

SBRT 2017 - D. Verellen