External radiation radiotherapy has revolutionized the way we treat patients with tumors-and the more accurate it is,the better the results.

Precise positioning is the cornerstone of patient safety, avoiding unprescribed doses and contributing to favorable outcomes through highly specific targeting of the tumor.
But how do you continuously hit the mark in long, complex treatments? How can this be integrated into a workflow that doesn't waste time or compromise patient safety and treatment efficiency?

CT Simulation is increasingly becoming the standard procedure in radiation therapy. But patient breathing, as well as movements of the tumor or normal tissue can impact planning, delivery and verification. With a normal CT scan, motion may cause inaccurate target definition, in that moving targets could be in distorted shapes at the wrong location. It could also cause extra dose distribution, in that moving targets could be in distorted shapes at the wrong location. It could also cause extra dose distribution to healthy tissue, due to dosing larger fields to cover a moving tumor.

To improve the visualization of moving tumors, 4D CT is applied to determine the motion and help to design an accurate plan for employing precise standard or gated therapy.

C-RAD Sentinel 4D CT is an easy-to-use, laser-based optical surface scanning system with functionality for 4D CT reconstruction and gated imaging in a CT room. It also provides reference images for patient positioning and intra-fraction motion detection in a radiation therapy treatment room.