M D Anderson Cancer Center Orlando TomoTherapy’s Implementation of Image-guided Adaptive Radiation Therapy Katja Langen, PhD Research supported by TomoTherapy Inc. Today’s Lecture • Introduction to helical tomotherapy • Image guidance with TomoTherapy • Adaptive radiation therapy with TomoTherapy Introduction to helical Tomotherapy TomoTherapy • Helical tomotherapy process to deliver IMRT • Same hardware can be used to image (MVCT) patient (IGRT) TomoTherapy Fan beam, continuously Patient rotates Tumor Healthy Organ TomoTherapy Divides beam into 64 beamlets each beamlet can be on/off TomoTherapy Fan beam, continuously Patient rotates Tumor Healthy Organ TomoTherapy Fan beam, continuously Patient rotates Tumor TomoTherapy Fan beam, continuously Patient rotates Tumor Healthy Organ Fan Beam lateral longitudinal 400 mm 10, 25, or 50 mm lateral longitudinal