Bolus Electron Conformal Therapy, or BolusECT® for short, is the use of a single electron beam with a variable thickness bolus that shapes the distal 90% isodose line to conform to and contain the PTV. It is the electron beam equivalent to intensity modulated radiation therapy (IMRT) with photon beams. BolusECT® tailors the penetration of the electron beam to the cancer, sparing underlying healthy tissue and critical structures.

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