多层螺旋ＣＴ低剂量扫描在副鼻窦检查中的应用

山东大学耳鼻喉眼学报 ›› 2009, Vol. 23 ›› Issue (2): 59-62 .

多层螺旋ＣＴ低剂量扫描在副鼻窦检查中的应用

王新怡¹，李福生²，杨志强¹，张经建¹，马振申¹

(1. 山东大学附属千佛山医院影像科，济南 250014；
2. 山东省医学科学院放射医学研究所，济南 250062）

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-04-16 发布日期:2009-04-16
通讯作者: 张经建

Low-dose multi-slice CT scanning for paranasal sinuses

(1. Department of Medical Imaging， Shandong Provincial Qianfoshan Hospital Affiliated to
Shandong University, Jinan 250014, China；
2. Institute of Radiation Medicine, Shandong Academy of Medicine Science, Jinan 250062, China)

Received:1900-01-01 Revised:1900-01-01 Online:2009-04-16 Published:2009-04-16

摘要/Abstract

摘要：

目的探讨副鼻窦低剂量CT扫描对图像质量及眼晶状体所受辐射剂量的影响。方法设置不同mAs对160例受检者进行冠状位及轴位CT扫描,同时检测受检者眼晶状体所受的辐射剂量，并对图像质量进行评分分析。结果当mAs从200?mAs依次降至100、50、25?mAs时，冠状位及轴位扫描组眼晶状体所受的辐射剂量依次较前一组明显降低。冠状位扫描四组中，200、100、50?mAs组之间在图像质量方面均没有统计学差异(P＞0.05），25?mAs?组的图像质量低于其它三组，差异有统计学意义（P＜0.05）；轴位扫描冠状面重建的图像质量与直接冠状面扫描的图像质量比较，200、100?mAs组两者之间差异无统计学意义（P＞0.05），50?mAs组和25?mAs组重建图像质量低于冠状面扫描，差异有统计学意义（P＜0.05）。结论副鼻窦冠状面CT扫描可降低管电流至50?mAs，而不损失图像诊断质量，同时晶状体所受放射剂量明显降低。在不低于50?mAs条件下可用轴位扫描冠状面重建图像代替直接冠状面扫描，而不降低对副鼻窦结构的显示。

关键词: 关键词：低剂量；体层摄影术，X线计算机；鼻窦')">关键词：低剂量；体层摄影术，X线计算机；鼻窦

Abstract:

To explore the effects of reducing mAs on diagnostic quality of images and the radiation dose to the lens undergoing sinus CT scanning. Methods160 cases were scanned in axial or coronary orientation at different mAs. Lens radiation dose was measured and image quality was evaluated. ResultsMean radiation dose to the lens was reduced in sequence with the reduction of mAs from 200?mAs to 100, 50, and 25?mAs. No significant difference of image quality in the coronary plane scanning groups was shown at 200, 100 and 50?mAs（P＞0.05）. Coronal reconstructed images in axial scanning were statistically poorer than coronal scanning images at groups 50 and 25?mAs（P＜0.05). Conclusion CT coronal scanning in mAs was reduced to 50?mAs without loss of diagnostic image quality. Coronal reconstructed images in axial scanning may take the place of coronal scanning images if mAs is not reduced below 50?mAs.

Key words: Key words： Low dose； Tomography, Xray computed； Nasal sinus

中图分类号:

R816.96

王新怡1 ，李福生2 ，杨志强1 ，张经建1 ，马振申1
. 多层螺旋ＣＴ低剂量扫描在副鼻窦检查中的应用[J]. 山东大学耳鼻喉眼学报, 2009, 23(2): 59-62 .

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