多排螺旋CT与牙科扫描软件：剂量学评估及技术改进
Multidetector CT and dentascan software: dosimetric evaluation and technique improvement.
作者信息
Fanucci E, Leporace M, Di Costanzo G, Fiaschetti V, Simonetti G
机构信息
Dipartimento di Diagnostica per Immagini e Radiologia Interventistica, Università degli Studi di Roma "Tor Vergata", Policlinico Tor Vergata, Viale Oxford 81, 1-00133 Roma, Italy.
出版信息
Radiol Med. 2006 Feb;111(1):130-8. doi: 10.1007/s11547-006-0014-7.
PURPOSE
The development of new operative techniques in oral and maxillofacial surgery within the last few years has led to an increasing demand for Dentascan examination, also in paediatric patients. It is necessary to modify acquisition parameters to reduce the absorbed dose. The aim of this study was to define a Dentascan protocol in which a reduced X-ray dose could be used.
MATERIALS AND METHODS
Dosimeters were applied to the eyes, mouth, parotid glands, thyroid and back of the neck of an anthropomorphic Plexiglas phantom that underwent multidetector computed tomography (MDCT) Dentascan examinations. Both 120kV and 80 kV were used to study the mandibular and maxillary arches.
RESULTS
Examinations obtained with the 80 kV protocol showed a ten-fold reduction in the absorbed dose, without affecting image quality.
CONCLUSIONS
We suggest a Dentascan protocol that reduces the X-ray dose administered to the patient while ensuring the same high diagnostic accuracy.
目的
过去几年口腔颌面外科新手术技术的发展使得对Dentascan检查的需求不断增加，儿科患者亦是如此。有必要调整采集参数以降低吸收剂量。本研究的目的是确定一种可使用降低X射线剂量的Dentascan方案。
材料与方法
将剂量计应用于接受多排螺旋计算机断层扫描（MDCT）Dentascan检查的人体模拟有机玻璃模型的眼睛、口腔、腮腺、甲状腺和颈部后方。120kV和80kV均用于研究下颌骨和上颌骨牙弓。
结果
采用80kV方案进行的检查显示吸收剂量降低了10倍，且不影响图像质量。
结论
我们建议采用一种Dentascan方案，该方案在确保相同高诊断准确性的同时，降低给予患者的X射线剂量。
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