改良反汤氏位对颧弓骨折诊断及辐射防护价值的探讨

对２１例临床拟诊颧弓骨折的外伤患者进行常规颧弓轴位及改良反汤氏位投照，并用ＲＧＤ＿３型热释光剂量仪对其中６例患者颜面部Ｘ线辐射剂量进行了测试。结果：两种投照位置照片，对颧弓骨折诊断的阳性率相同，但对骨折线及骨折错位程度的显示，后者优于前者。在患者颜面部接受Ｘ线辐射剂量上，改良反汤氏位约低于常规颧弓轴位的１９～２３倍。在投照方法学上，改良反汤氏位简便，易行，医患双方均易接受。

Significance of Improved Reverse_Towne's Position in Diagnosis of Zygomatic Arch and Radiation Protection

Twenty_one patients with suspected zygomatic arch fracture were X_rayed with zygomatic arch axial position and improved reverse_Towne's position (IRTP). These two methods were compared. The results indicated that (1) the films of two ways of projections were of the same positive rate for the zygomatic arch fracture, whereas fracture line and displacement revealed by IRTP were clearer than those by axial position; and that (2) the method of IRTP was easier to performance and could reduce X_ray exposure to eyeballs. The authors suggested that IRTP should be the first selection to those suspected zygomatic arch fracture..