CPAP Use in SBRT Treatment
CPAP for SBRT Treatment – Another Advance at Sheba Medical Center
Sheba Medical Center advances the use of CPAP in SBRT treatment with astounding results. Stereotactic body radiation therapy (SBRT) is used in the treatment of metastatic cancer, most commonly to the lymph nodes, liver, and abdomen.
The goal of radiation therapy is accuracy – exposing cancer cells to radiation while minimizing the exposure of healthy tissues. This can be a difficult undertaking, as even the normal movement associated with breathing can move target tissues out of alignment. This means that radiation oncologists often must increase the treatment area beyond the tumor in order to ensure that the entire tumor is treated, therefore exposing healthy tissue to the radiation treatment.
Dr. Yaacov Lawrence, the director of the Center for Translational Radiation Oncology at Sheba Medical Center, puts it succinctly.
“The tumor moves as the patient breathes, and this can mean that in order to hit the tumor, there is a need to treat a larger area than the size of the tumor itself. For example, if the tumor is 2 cm in diameter but the chest moves with respiration, we need to treat at least 6 cm, expanding the margins in order to treat the entire tumor.”

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