TomoTherapy Treatment Delivery

Escaping the confines of conventional radiation treatment devices developed more than a half century ago, the TomoTherapy® System design combines CT imaging with a radiation treatment delivery system. With this unique design, the TomoTherapy System enables efficient daily 3D CT imaging to ensure the accuracy of the patient position before each treatment delivery and leverages the ring geometry to then deliver state-of-the-art radiation treatments, including intensity-modulated radiation therapy (IMRT) and 3D conformal radiation therapy (3DCRT). Radiation delivered by the TomoTherapy System is aided by its sophisticated multi-leaf collimator (MLC), a patented device that opens and closes quickly to permit, or block, the passage of radiation, dividing the radiation beams into many smaller beamslets. The patterns of movement is precisely calculated before treatment begins, so the intensity of the radiation beam delivered conforms to the patient’s tumor and helps avoid critical structures as the machine rotates 360 degrees around the patient.