Real-time X-ray monitoring of internal motion during radiotherapy delivery

Elekta has introduced new intrafraction imaging capabilities within its X-ray Volume Imaging (XVI) system that is integrated with the company’s Versa HD linear accelerator. During treatment, XVI now provides the tools to monitor and manage internal motion, supporting clinicians’ efforts to increase therapeutic doses delivered to the tumor while reducing healthy tissue exposure. Regardless of patient immobilization, both the tumor and adjacent critical structures may move during treatment delivery. Historically, this has presented a significant challenge in delivering highly targeted treatments. Imaging in real time as the treatment is delivered is a significant advance. On a second-by- second basis, the precise location of the tumor and sensitive healthy structures can now be visualized, helping clinicians accurately deliver dose to the tumor while minimizing normal tissue exposure. The XVI includes 2D, 3D and 4D intra-fraction imaging to support live imaging during sophisticated delivery techniques, such as Volumetric Modulated Arc Therapy (VMAT).