大螺距扫描对阻塞性睡眠呼吸暂停综合征患者的动态成像及辐射剂量的研究  

作　　者：何桂茹[1] 杨进军[1] 刘艳[1] 古丽巴哈[2] 杨君[1] 李江红[1] 

机构地区：[1]新疆医科大学第五附属医院CT室,830000 [2]新疆医科大学口腔颌面外科,830000

出　　处：《临床医药文献电子杂志》2014年第5期16-16,51,共2页Electronic Journal of Clinical Medical Literature

摘　　要：目的探讨Flash CT在阻塞性睡眠呼吸暂停综合征(OSAS)诊断中的应用价值。方法 A组:11例OSAS患者在睡眠前、后分别进行大螺距Flash CT扫描。然后进行气道三维重建,多层面重建(MPR),容积显示(VR)进行观察,测量上气道的矢状径、冠状径及截面积;B组:常规MSCT扫描OSAS患者11例,分析比较两组病例的辐射剂量。结果 OSAS患者睡眠呼吸暂停时气道最狭窄处面积比清醒时明显变小,在悬雍垂区差异有统计学意义(P<0.05)。A组有效辐射剂量ED(0.43±0.019)msv,B组为(076±0.033)mse,A组比B组减少了43.43%的有效辐射剂量,有统计学差异(P<0.05)。结论双源CT flash扫描可动态观察气道,并对狭窄部位和范围进行定位,为选择治疗方案包括外科手术方式提供可靠依据,并可降低辐射剂量。Object To asses the application value of flash CT amomg the patients with obstructive sleep apnea syndrome （OSAS）. Methods 11 patients with OSAS were scanned by high-pitch spiral scanning in sleeping and nonsleeping status respectively ,and upper airway were reconstruct in group A,and the cross-section area with its corresponding sagital,axial,cornal diameters were mesureed respec-tively.In MSCT scanning mode were applied in group B.The CT dose （ED） were compared between two groups. Results OSAS patients were obviously smaller in sleeping status than in nonsleeping status .There are statistically significant difference at the uvula levels （P〈0.05）. The ED in group A and B was（0.43±0.019）msv and（0.76±0.033） msv（P〈0.05）.The effective dose was decreased by 43.43%for group A. Conclusion Flash CT helps evaluating the degree and range of stenois of the upper airway in OSAS patients and is useful in treatment planning. The diagnosis of OSAS disease using flash scan mode can reduce radiation expose than using MSCT scanning mode.

关 键 词：睡眠呼吸暂停综合征 大螺距 动态成像 低剂量 

分 类 号：R814.43[医药卫生—影像医学与核医学]