胸腹部CT扫描呼吸方法的探讨——过度换气呼气末屏气与平静呼吸吸气末屏气的比较  

Research on breath method of chest and abdomen in CT scan:comparison between breath out after excessive breath and breath in after normal breath

作　　者：陶客言[1] 付凯[1] 高燕[1] 张晓军[1] 黄红云[1] 杨靖逸[1] 

机构地区：[1]四川省人民医院放射科,成都市610072

出　　处：《实用医学影像杂志》2004年第2期67-69,共3页Journal of Practical Medical Imaging

摘　　要：目的通过平静呼吸吸气末屏气(组)A与过度换气呼气末屏气(组)B的比较,找出既能增加屏气时间,又能减少层面差异的方法。方法选胸腹部CT检查的病人(志愿者),进行呼吸训练,用秒表测量A组与B组的屏气时间;两组病例均做常规螺旋CT扫描,选取一定层面做一次扫描,记录其与螺旋CT扫描图像中相同层面的床位差为层面差。结果两组屏气时间男性有显著差异(P<0.001,t=6.317),女性亦有显著差异(P<0.001,t=12.98)。层面差异测量,两组比较胸部有显著差异(P<0.001,t=5.662),上中腹部有显著差异(P<0.001,t=5.548)A组胸部和上中腹部之间无显著差异(P>0.2,t=1.073)B组。,胸部和上中腹部之间无显著差(P>0.5,t=0.4979)。结论B组屏气时间比A组明显增加,两组屏气的时间男性大于女性,两组屏气时间增加率男性小于女性。同层扫描可重复性的呼吸控制方法,组优于A组。Objective To find a method that allow increase breath holding time and decrease slice difference by compared with breath holding after excessive breath and after nomal breath.Methods The patients that were selected by volunteer with performed chest and abdomen CT were trained breath and measured the breath holding time in A and B group.The all were formed normal spiral CT.We selected a slice and scanned one time,and recorded the table position difference which was considered as slice difference in same slice imaging of spiral CT.Results The time of breath holding in male and female patients had significant differences(P< 0.001)at chest and upper-middle abdomen between two groups.The slice defference is significant(P< 0.001)between two groups,but weren′t obvious in chest and upper-middle abdomen at interior of A (P >0.2)and B (P >0.5)group.Conclusion The time of breath holding increased obviously in B than A group.The time of breath holding is longer in male than female,and the rate of time increasing is reverse.The methods which control repeated is better in A than B group at same slice scanning.

关 键 词：X线计算机 CT扫描 胸腹部 呼吸控制 过度换气 

分 类 号：R814.3[医药卫生—影像医学与核医学]