Radiation Dose to Radiosensitive Organs during Head/Sinus Computed Tomography Procedure.

Document Type : Original Article

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radiation protection department, nuclear research center, atomic energy authority

Abstract

The current study aims to measure the entrance surface air kerma and absorbed dose to radiosensitive organs such as eyes and thyroid glands, due to scattered radiation during head/ sinus Computed Tomography (CT) scan. The entrance surface air kerma (ESAK) and absorbed dose for the eyes and thyroid of the Rando phantom’s head were evaluated by distribution of the standardized thermoluminescence dosimeters at the surface and 10 mm depth for slices for eye and thyroid sections. The ESAK for eyes and thyroid during head/sinus CT examinations was, as follows: 29.73± 1.63 mGy for eyes and 26.12 ± 1.51 mGy for thyroid . The mean absorbed dose of Hp (10) to eyes and thyroid during the Rando phantom’s head CT were 1.86 ± 0.02 mGy and 1.59 ± 0.08 mGy, respectively. The scientific study concluded that lowering scan length for the sinus CT scan is necessary to minimize a scattered dose to radiosensitive organs.

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