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Cancer Treatment Centers of America

Calypso® 4D Localization System™ for breast cancer

Calypso® 4D localization system for breast cancer

Calypso allows our radiation oncologists to deliver focused doses of radiation with greater precision for patients being treated for breast cancer.

Prior to treatment, transponders are placed on the skin near the middle of the patient’s chest to track respiratory movement and other patient motion. Patients are then asked to take a deep breath and hold it for a few seconds. This action expands the chest and moves the heart out of the radiotherapy beams’ path. Our radiation oncologists then use this “map” to deliver the prescribed radiotherapy. The technology allows for continuous monitoring during treatment and will discontinue the delivery of radiation if the patient’s breathing pattern falls outside the “mapped” treatment plan. 

In this recent generation of the Calypso system, the transponders are able to show the position of the patient’s treatment target area, and automatically shut the beam off in the event of a cough, sneeze or other internal change of position that moves the treatment target area out of the X-ray beam’s path. By precise targeting and tracking and by avoiding nearby healthy tissues, Calypso is designed to reduce radiation exposure to the heart, lungs and other healthy tissues.