锥形束CT在牙种植计划中的应用：患者剂量测定结果与文献中体模研究数据的接近程度如何？

CONE BEAM CT IN DENTAL IMPLANT PLANNING: HOW CLOSE ARE PATIENT DOSIMETRY RESULTS WITH DATA FROM PHANTOM STUDIES FOUND IN LITERATURE?

作者信息

Kottou S, Zapros A, Stefanopoulou N, Krompas N, Tsapaki V

机构信息

National and Kapodistrian University of Athens, School of Medicine, Medical Physics Lab, Athens, Greece.

Konstantopoulio General Hospital, Athens, Greece.

出版信息

Radiat Prot Dosimetry. 2019 Dec 31;187(3):321-326. doi: 10.1093/rpd/ncz169.

DOI:10.1093/rpd/ncz169

PMID:31297525

Abstract

Advantages of Cone Beam Computed Tomography (CBCT) include high-quality 3D imaging and reduced radiation exposure with relatively low cost. In this study, patient radiation exposure in CBCT implant planning dentistry was measured in terms of Kerma Area Product (KAP). Data were obtained from 217 CBCT scans on 168 individuals using a CS9300 Carestream system. Scans were made using 80-90 kVp, 4-5 mA, 8 and 13.3 s exposure time (depending on voxel size) and a fixed field of view (FOV) of 10 × 10 cm2 (medium). Mean KAP was estimated using two voxel sizes 180 × 180 × 180 μm3 and 200 × 200 × 200 μm3 and found to be 399 and 314 mGycm2, respectively. Corresponding KAP values found in literature ranged between 210 and 2140 mGycm2. Mean E was estimated using conversion coefficient factors found in literature, according to FOV size and tube voltage value and found to range between 24 and 161 μSv.

摘要

锥形束计算机断层扫描（CBCT）的优点包括高质量的三维成像、较低的辐射暴露以及相对较低的成本。在本研究中，通过比释动能面积乘积（KAP）来测量CBCT种植计划牙科中患者的辐射暴露。数据来自使用Carestream CS9300系统对168名个体进行的217次CBCT扫描。扫描时使用80 - 90 kVp、4 - 5 mA、8和13.3秒的曝光时间（取决于体素大小）以及10×10 cm²的固定视野（FOV，中等）。使用180×180×180μm³和200×200×200μm³两种体素大小估计平均KAP，分别为399和314 mGycm²。文献中相应的KAP值在210至2140 mGycm²之间。根据文献中找到的转换系数因子，根据视野大小和管电压值估计平均E，发现其范围在24至161μSv之间。