Yamauchi-Kawaura Chiyo, Fujii Keisuke, Aoyama Takahiko, Yamauchi Masato, Koyama Shuji
School of Health Sciences, Nagoya University, 1-1-20, Daikominami, Higashi-ku, Nagoya, Japan.
Radiat Prot Dosimetry. 2009 Aug;136(1):38-44. doi: 10.1093/rpd/ncp138. Epub 2009 Jul 18.
The purpose of this study was to clarify patient doses in the current otolaryngological multi-detector row computed tomography (MDCT) examinations. Patient doses were measured with an in-phantom dosimetry system which was composed of 48 photodiode dosimeters embedded within an anthropomorphic phantom. Organ and effective doses were evaluated according to the International Commission on Radiological Protection Publication 103. In neck CT, doses for salivary glands and for thyroid were high, 7.6-29.9 and 13.4-60.3 mGy, respectively. In sinus CT, brain and lens doses were high, 7.6-24.6 and 10.6-32.0 mGy, respectively, and in inner ear CT, lens dose was 8.0-35.3 mGy. Effective doses were 1.8-6.6 mSv in neck CT, 0.5-0.9 mSv in sinus CT and 0.3-0.6 mSv in inner ear CT. The present dose data would be used to estimate radiation risks for patients undergoing otolaryngological MDCT examinations.
本研究的目的是明确当前耳鼻咽喉科多排螺旋计算机断层扫描（MDCT）检查中的患者剂量。使用体模内剂量测定系统测量患者剂量，该系统由嵌入人体模型内的48个光电二极管剂量计组成。根据国际放射防护委员会第103号出版物评估器官剂量和有效剂量。在颈部CT检查中，唾液腺和甲状腺的剂量较高，分别为7.6 - 29.9 mGy和13.4 - 60.3 mGy。在鼻窦CT检查中，脑和晶状体的剂量较高，分别为7.6 - 24.6 mGy和10.6 - 32.0 mGy，在内耳CT检查中，晶状体剂量为8.0 - 35.3 mGy。颈部CT检查的有效剂量为1.8 - 6.6 mSv，鼻窦CT检查为0.5 - 0.9 mSv，内耳CT检查为0.3 - 0.6 mSv。目前的剂量数据将用于估计接受耳鼻咽喉科MDCT检查患者的辐射风险。
