EFFECTIVE DOSE MEASUREMENT FOR CONE BEAM COMPUTED TOMOGRAPHY USING GLASS DOSIMETER

• Published in: Nuclear engineering and technology Vol. 46; no. 2; pp. 255 - 262
• Main Authors: Moon, Young Min, Kim, Hyo-Jin, Kwak, Dong Won, Kang, Yeong-Rok, Lee, Man Woo, Ro, Tae-Ik, Kim, Jeung Kee, Jeong, Dong Hyeok
• Format: Journal Article
• Language: Korean
• Published: 2014
• Subjects: Image Guided Radiotherapy; Effective Dose; Cone Beam Computed Tomography
• ISSN: 1738-5733; 2234-358X

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 $3.37{\pm}0.29$, $7.36{\pm}0.33$, and $4.09{\pm}0.29$ mSv, respectively. The results highlight the importance of the compensation of treatment dose by managing imaging dose.