EFFECTIVE DOSE MEASUREMENT FOR CONE BEAM COMPUTED TOMOGRAPHY USING GLASS DOSIMETER

• Main Authors: YOUNG MIN MOON, HYO-JIN KIM, DONG WON KWAK, YEONG-ROK KANG, MAN WOO LEE, TAE-IK RO, JEUNG KEE KIM, DONG HYEOK JEONG
• Format: Article
• Language: English
• Published: Elsevier 2014-04-01
• Series: Nuclear Engineering and Technology
• Subjects: Effective Dose; Cone Beam Computed Tomography; Image Guided Radiotherapy
• Online Access: http://www.sciencedirect.com/science/article/pii/S1738573315301698

During image-guided radiation therapy, the patient is exposed to unwanted radiation from imaging devices built into the medical LINAC. In the present study, the effective dose delivered to a patient from a cone beam computed tomography (CBCT) machine was measured. Absorbed doses in specific organs listed in ICRP Publication 103 were measured with glass dosimeters calibrated with kilovolt (kV) X-rays using a whole body physical phantom for typical radiotherapy sites, including the head and neck, chest, and pelvis. The effective dose per scan for the head and neck, chest, and pelvis were 3.37±0.29, 7.36±0.33, and 4.09±0.29 mSv, respectively. The results highlight the importance of the compensation of treatment dose by managing imaging dose.