The size of a grain of rice, the new transponders can be implanted within soft tissue throughout the body, with the exception of the lung. The Calypso GPS for the Body® system can then continuously track and monitor the position of the transponders, so that the high energy treatment beams can be precisely aimed to minimize exposure of surrounding healthy tissues. An earlier version of the Calypso Beacon transponder was cleared for use specifically in the prostate and prostatic bed; the new clearance makes the system applicable for many other types of cancer.
Calypso Beacon transponders emit a non-ionizing electromagnetic signal that is tracked in real time by the Calypso system, in order to guide treatment beams to precisely target tumors during radiotherapy and radiosurgery with medical linear accelerators, such as Varian's Edge™ radiosurgery system.
"With the new transponder, clinicians can use the Calypso system most places they would have used standard fiducial markers, such as gold seeds, to localize a targeted tumor, but with the added benefit of continuous tumor position tracking throughout treatment delivery," said
"I have been using standard fiducial markers, particularly when treating tumors of the pancreas and liver," said
The new Calypso soft tissue Beacon transponders can only be used with the latest upgrade of the Varian Calypso system (version 3.0). Current Calypso Beacon transponders for the prostate are not appropriate for the new soft tissue indication due to device and labeling differences. "Initial use of the new device is expected towards the end of the year," said
Calypso soft tissue Beacon transponders are cleared for the U.S. market only.
Calypso System Intended Use Summary
The Calypso System, including its associated Beacon transponders, is intended to align and/or monitor the patient's position in relation to the radiation beam used for treatment. The Calypso System may also be used to regulate the treatment beam on Varian and
Keywords for this news article include: Radiosurgery, Radiotherapy,
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