单平面Simpson法计算右室容积的可行性研究  

Validity of the accuracy of right ventricular volume measurement with single plane Simpson′s rule based on a new half-circle model

作　　者：崔炜[1] Hirofumi Anno Takeshi Kondo Yoshihiro Ida Takahisa Sato Masayoshi Sarai Hitoshi Shinoza kiSatoshi Kakizawa Kouji Sugiura Keita Oshima Kazuhiro Katada Hitoshi Hishida 

机构地区：[1]河北医科大学第二医院河北省心脑血管病研究所心内科,石家庄050000 [2]Fujiata Health University

出　　处：《中华放射学杂志》2003年第9期837-839,共3页Chinese Journal of Radiology

基　　金：河北省博士基金资助项目 (0 0 5 42 0 0 1D 15 )

摘　　要：目的　评价单平面Simpson法计算右心室容积的可行性。方法　采用Toshiba多层螺旋CT对 15个人的右心室铸型进行扫描 ,然后沿右心室长轴重建出右心室矢状面的多平面重组(multiplanarreformattedimage ,MPR)图像 ,采用单平面Simpson法对右心室铸型的容积进行计算。右心室铸型的实际容积采用阿基米德原理计算。结果　右室铸型的实际容积为 (6 4 .2 3± 2 4 .5 1)ml,单平面Simpson法右心室容积计算值为 (5 3.18± 2 6 .2 2 )ml,平均低估右心室实际容积 (11.0 5± 13.0 9)ml(t=3.2 7,P =0 .0 0 6 )。单平面Simpson法计算的右心室容积值与右室铸型的实际容积显著相关 (r=0 86 9,P <0 .0 0 1)。结论　单平面Simpson方法可以用于右心室容积的计算 。Objective Right ventricular volume calculation is the basis of right ventricular function evaluation. The complexity of right ventricular shape makes it more difficult for measuring right ventricular volume, and therefore limits the widespread use of right ventricular function assessment. However, the short-axis view of the right ventricle is usually crescent, and might be assumed as half of a circle. This hypothesis can be applied to calculate right ventricular volume by using the plane Simpson′s rule, but the final right ventricular volume should be about half of the original calculated value. The aim of this study was to test the accuracy of right ventricular volume measurement based on this new assumption in human right ventricular casts. Methods Fifteen human right ventricular casts were obtained within 24 hours after death from 15 subjects who did not have overt cardiac disease. These casts were scanned with Toshiba multislice helical CT (Aquilion) using a scanning protocol similar to clinical practice. Right ventricular sagittal MPR images that correspond to right anterior oblique view were reconstructed later and single-plane Simpson′s method was used to calculate right ventricular volumes. The calculated right ventricular volume was defined as the original calculated value divided by 2. The actual right ventricular casts volumes were determined by water displacement method. Results The actual right ventricular volume was (64.23±24.51) ml, while the calculated volume was (53.18±26.22) ml. The calculated right ventricular volume significantly underestimated the actual volume by (11.05±13.09) ml( t =3.27, P =0.006). However, there was a close correlation between the actual cast volume and the calculated volume ( r = 0.869, P <0.001), with a regression equation of RV actual volume = 21.04+0.812×RV calculated volume. Conclusion Right ventricular volume could be calculated accurately with single-plane Simpson′s rule based on our new proposed half-circle arithmetic model.

关 键 词：右心室容积 铸型 多平面重组 矢状面 影像检查 多层螺旋CT MPR 图像 平均 长轴 

分 类 号：R540.4[医药卫生—心血管疾病]