使用新型牙科计算机断层扫描设备时颌面成像中的辐射吸收情况。
Radiation absorbed in maxillofacial imaging with a new dental computed tomography device.
作者信息
Mah James K, Danforth Robert A, Bumann Axel, Hatcher David
机构信息
School of Dentistry, Division of Craniofacial Sciences and Therapeutics, University of Southern California, Los Angeles 90089-0641, USA.
出版信息
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2003 Oct;96(4):508-13. doi: 10.1016/s1079-2104(03)00350-0.
OBJECTIVE
The purpose of this investigation was to measure the tissue-absorbed dose and to calculate the effective dose for the NewTom 9000, a new generation of computed tomographic devices designed specifically for dental applications. Comparisons are made with existing reports on dose measurement and effective dose estimates for panoramic examinations and other computed tomographic imaging modalities for dental implants.
STUDY DESIGN
Thermoluminescent dosimeters were implanted in a tissue-equivalent humanoid phantom at anatomic sites of interest. Absorbed dose measurements were obtained after single and double exposures. The averaged tissue-absorbed doses were used for the calculation of the whole-body effective dose.
RESULTS
The effective dose for imaging of maxillomandibular volume with a NewTom 9000 machine is 50.3 muSv.
CONCLUSION
The effective dose with the NewTom 9000 machine is significantly less than that achieved with other computed tomographic imaging methods and is within the range of traditional dental imaging modalities.
目的
本研究旨在测量新一代专门用于牙科应用的计算机断层扫描设备NewTom 9000的组织吸收剂量，并计算有效剂量。将其与现有的关于全景检查及牙科植入物的其他计算机断层成像模式的剂量测量和有效剂量估计报告进行比较。
研究设计
将热释光剂量计植入组织等效人体模型的感兴趣解剖部位。在单次和两次曝光后获得吸收剂量测量值。平均组织吸收剂量用于计算全身有效剂量。
结果
使用NewTom 9000机器对上颌下颌体积成像的有效剂量为50.3微希沃特。
结论
NewTom 9000机器的有效剂量明显低于其他计算机断层成像方法，且在传统牙科成像模式的范围内。
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