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J Korean Soc Ther Radiol > Volume 10(2); 1992 > Article
Journal of the Korean Society for Therapeutic Radiology 1992;10(2): 155-162.
Dose Distribution for Eye Shielding Block in 6 MV Photon Beam Therapy
Kyung Ja Lee
Department of Radiology, College of Medicine, Ewha Womans University, Seoul, Korea.
The eye lens is known to be radiosensitive organ and catarat can be induced by relatively low dose of radiation. In the treatment of head and neck tumors, shielding blocks are frequently used to minimize dose on sensitive organs. The shielding block, which is trade of high atomic number materials (cerrobend), produce significant dose perturbations in megavoltage photos beams. The effects of these perturbations of eye shielding blocks are measured with film and ion chambers for the treatment of head and neck malignancies. Optimum parameters for the treatment are suggested.
Key Words: Eye shielding, Megavoltage beam, Cerrobend
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