Respiratory Gating with Real-time Position Management (RPM)
Tumors and organs can move during the normal breathing cycle. To account
for this movement we use the Varian Real-time Position Management™
(RPM) system. This RPM system is a non-invasive, imaging system that allows
for precise tumor localization during the breathing cycle. Tumors that
benefit from RPM include lung, liver and other tumors within the abdomen.
During the simulation procedure, an infrared tracking camera is used and
a reflective marker placed on the patient’s skin. With the movement
of the reflective marker on the patient’s skin we are able to capture
the respiration by the infrared tracking camera. The information gained
from the RPM system gives our physicians the ability to pin point tumor
location in relation to our patient's respiratory cycle. This information
assists the Radiation Oncologist with defining the tumor volume to be treated.