Dose distribution under external eye shields for high energy electrons

Journal Article · Wed Jan 01 00:00:00 EST 1986 · Int. J. Radiat. Oncol., Biol. Phys.; (United States)

DOI:https://doi.org/10.1016/0360-3016(86)90429-3· OSTI ID:5732230

Rustgi, S N

Effectiveness of eye shields in reducing the dose to the eye lens from 6 and 9 MeV electron beams from a linear accelerator has been evaluated. The thickness of the shields made from cerrobend was such that only bremsstrahlung photons were transmitted. A shield with a diameter of 1.3 cm and thickness of 1 cm was adequate for the 9 MeV electron beam. The optimum shield to phantom surface distance was 1 cm or less. The same shield with a thickness of 0.5 cm was found to be ineffective with a 6 MeV electron beam. The dose under the shield is greater than predicted by transmission measurements because of the contribution of phantom and electron cone generated scattered electrons.

• Research Organization: Georgetown Univ. Hospital, Washington, DC
• OSTI ID: 5732230
• Journal Information: Int. J. Radiat. Oncol., Biol. Phys.; (United States), Vol. 1
• Country of Publication: United States
• Language: English

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62 RADIOLOGY AND NUCLEAR MEDICINE
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