螺旋CT低剂量扫描在颅面部外伤中的应用价值

目的：探讨不同低剂量CT扫描在颅面部外伤中的应用价值。方法：将60例颅面部外伤患者分为4组,其中1组行常规剂量扫描,其余3组行不同低剂量CT扫描,比较常规剂量组（120kV,220mA）和低剂量组（120kV,160、80、60mA）共4组的图像质量及患者所受辐射剂量。结果：低剂量（160、80mA）CT扫描所得CT图像较好,60mA组患者所受辐射剂量较低,比常规剂量组单次扫描权重剂量指数分别降低了33%、67%和73%;低剂量（160、80mA）与常规剂量组所得图像质量比较无明显差异,60mA组与常规剂量组所得图像质量比较有显著性差异。结论：可利用低剂量（80mA）对颅面部外伤进行扫描,所得的图像对疾病的诊治无影响。

Value of Low-dose Multi-slice CT in Application of Craniofacial Trauma

Objective To explore the different low-dose CT scanning of the eraniofacial trauma of application value.Methods 60 cases of craniofaeial trauma patients were divided into one group of conventional-dose group of line scan and 3 different low-dose CT scan, the conventional dose group（120 kV, 220 mA）, low dose group （120 kV, 60, 80,60 mA） compared the level 4 group of patients with image quality and radiation dose received,Results The low-dose （160,100 mA） CT scan obtained better CT image, patients of 60 mA group received a lower radiation dose. Group single-scan dose index weights were reduced 33%, 67% and 73% respectively; There was no significant differences between low-dose group（160, 80 mA） and the normal group, while there was significant differences between the group of 60mA and normal group. Concluaion The use of low-dose （80 mA） for craniofacial trauma scan images obtained from the diagnosis and treatment of disease has no bad effect.[Chinese Medical Equipment Joumal,2009,30（9）：81-82]