双源CT Flash Spiral扫描模式在婴幼儿胸部成像中的应用  

The Application of Flash Spiral Technique of Dual-Source Computed Tomography in the Infantile Chest

作　　者：王萍[1] 张成周[1] 殷志杰[1] 曹新山[1] 邢学玲[1] 姜兴岳[1] 

机构地区：[1]滨州医学院附属医院放射科,山东256603

出　　处：《临床放射学杂志》2013年第5期726-729,共4页Journal of Clinical Radiology

摘　　要：目的探讨双源CT Flash Spiral扫描模式在婴幼儿胸部成像中的应用价值。方法将120例拟诊为胸部疾患的婴幼儿随机分为A、B两组,A组60例(0～36个月),行双源CT Flash Spiral模式扫描,螺距3.0,扫描过程中患儿清醒;B组60例(0～36个月),行64层CT常规螺距模式扫描,螺距1.3,扫描过程中患儿处于睡眠状态。对A、B两组图像质量(运动伪影)、辐射剂量(CT容积剂量指数CTDIvol值、剂量长度乘积DLP值)及扫描时间进行对比分析。结果 A组图像质量评级优于B组(Z=-9.96,P=0.00);A组患儿的平均CTDIvol值及DLP值均小于B组(t=-45.10,P=0.00;t=-43.03,P=0.00);A组扫描时间短于B组(t=-55.31,P=0.00)。结论双源CT Flash Spiral扫描模式扫描速度快、辐射剂量低,婴幼儿于清醒状态行胸部CT检查亦能获得满意图像。Objective o evaluate the application of flash spiral technique of dual-source computed tomography in the infantile chest. Methods 120 infants diagnosed as chest disorders were studied. They were randomly divided into two groups of A, B. 60 patients （0-36 month） of group A were examined with a dual-source CT system in flash spiral scan mode（pitch = 3.0）. The children were in a sober state in the scanning process; 60 patients （0-36 month） of group B were examined with a 64-slice CT in conventional pitch mode（pitch = 1.3 ）. The children were in a sleep state in the scan- ning process. The image quality （motion artifacts）, radiation dose （CTDIvol, DLP） and scaning time between the two groups were analysed. Results The Image quality of group A was better than group B （ Z = - 9. 96,P = 0.00）. The CT- DIvol and DLP value of group A was less than group B （ t = - 45. 10, P = 0. 00 ; t = - 43.03,P = 0.00）. The scanning time of group A was shorter than group B （ t = - 55.31, P = 0.00）. Conclusion The flash spiral technique of dual-source computed tomography has higher scanning speed, lower radiation dose in the chest, the infants in a sober state can also ob- tain satisfactory chest image.

关 键 词：双源CT FLASH SPIRAL 运动伪影 婴幼儿 胸部 

分 类 号：R816.92[医药卫生—放射医学]