Abstract
A new thermoplastic material with extremely desirable physical and radiation shielding properties is presented. The material softens between 108 degrees F and 132 degrees F and can then be easily molded to any desired shape. As it cools down it hardens at about 102 degrees F, retaining its molded shape. It is very light (rho = 1.66 g/cc), compared to most other compensating and shielding materials used in the clinic. Its photon and electron attenuation characteristics have been measured and are compared with other materials relevant to radiotherapy. Possible applications as a bolus material, compensator and partial or total shielding material in clinical radiation therapy are discussed.
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