16排与256层螺旋CT在老年人肺动脉栓塞检查中应用对比

The compared application 16 row and 256-slice spiral CT examination of pulmonary embolism in the elderly

目的探讨16排与256层螺旋CT在老年人肺动脉栓塞检查中应用对比。方法 2009年2月至2012年1月肺动脉栓塞16例,依据检查方法不同分为256层螺旋CT组9例,16排螺旋CT 7例,进行主观及客观评价。结果两组扫描时间比较差异有统计学意义(P<0.05),肺动脉平均CT值、信号噪声比(SNR)、对比度噪声比(CNR)256层螺旋CT组均优于16排螺旋CT组,经比较差异无统计学意义(P>0.05)。结论 256层螺旋CT管球旋转速度为0.27 s,探测器宽度为8 cm,扫描速度较64排螺旋CT明显提高。通过对16排与256层螺旋CT在肺动脉造影用于老年人肺动脉栓塞检查对比,256层螺旋扫描时间平均为3.26 s,降低扫描时间对于危重患者,特别是不能长时间屏气患者尤为重要。256层螺旋CT在图像质量及肺动脉平均CT值、信号噪声比、对比度噪声比优于16排螺旋CT但无显著差异。总之,256层螺旋CT在老年人肺动脉栓塞检查中能够显著缩短检查时间,减少患者屏气时间,降低患者检查时危险。

Objective To investigate the 16-slice and 256-slice spiral CT examination of pulmonary embolism in the elderly application of contrast.Methods From February 2009 to January 2012 pulmonary embolism in 16 cases,based on inspection methods were divided into 256-slice spiral CT group,9 cases,16-slice spiral CT 7 cases,subjective and objective evaluation.Results There were more scan time significant differences（P0.05）,mean pulmonary artery CT value,the signal-noise ratio（SNR）,contrast-noise ratio（CNR） 256-slice spiral CT group were better than the 16-slice spiral CT group,the more no significant difference（P0.05）.Conclusion The 256-slice CT tube rotation speed of the ball as 0.27 s,the detector width of 8 cm,scanning speed than the 64-slice spiral CT has improved significantly.16 row by 256-slice spiral CT with pulmonary angiography in pulmonary embolism examination for the elderly compared with 256-slice scan time averaged 3.26 s,reducing scan time for critically ill patients,especially not for a long time was particularly important in patients with breath-hold.256-slice spiral CT in pulmonary artery mean CT image quality and value,the signal-noise ratio,contrast-noise ratio better than 16-slice spiral CT,but no significant difference.In short,256-slice spiral CT examination of pulmonary embolism in the elderly can significantly shorten the examination time,reduce patient breath-hold time,reducing the risk of patient examination.