Surface-guided radiation therapy

Surface-guided radiation therapy (SGRT) (sometimes referred to as Surface-image Guided Radiation Therapy) is a process which uses 3D imaging to position and track radiation therapy patients during their treatment. == Goals and clinical benefits == SGRT can help to improve the safety, effectiveness and efficiency of radiation therapy treatments, by offering guidance across every step of the radiation therapy workflow, including simulation, planning, treatment and dose visualisation.

Source: Wikipedia — Surface-guided radiation therapy (CC BY-SA 4.0)