News | January 29, 2007

FDA Clears Varian's New Patient Positioning Monitor Feature

January 30, 2007 - Varian Medical Systems announced today that it has received FDA 510(k) clearance for patient position monitoring capabilities that have been added to the company's RPM respiratory gating system used to synchronize imaging and radiation therapy treatment with a patient's respiratory cycle, enabling clinicians to achieve better results when treating diseases.

The new feature in Varian's RPM system reportedly detects any motion that compromises the accuracy of the treatment, and works by placing a reflective marker box on the patient's chest or abdomen and monitoring its motion using special cameras positioned in the treatment room. The new version of the RPM system analyzes the marker block motion in all three dimensions as it moves up and down, forward and back, and side to side. A new display on the system's console immediately alerts the radiation therapist if the patient moves and should be repositioned.

The system learns how the marker block is going to move on each patient when that patient stays still and breathes normally, according to the manufacturer. The system is designed to alert the clinician to halt the treatment and reposition the patient if the patient moves beyond its natural range of motion.

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