title: Electron therapy of intraorbital tumors.
abstract: The authors describe a modification of a previously reported method of treating intraorbital tumors using multiple electron beams. An adjustable metal shield is inserted in the electron tube to protect the lens. The three-dimensional dose distribution was determined by film measurements and the film density measured with an RFA-1 densitometer on line with a computer. The density values were stored in a three-dimensional matrix. Different planes in the matrix can be selected for isodose plotting.
mesh_terms: D004583:Electrons; D006801:Humans; D009918:Orbital Neoplasms / Q000532:radiotherapy*; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy / Q000295:instrumentation / Q000379:methods*