不同旋转步长三维超声体积自动测量技术测量体积准确性的仿体实验研究  

An empirical study of virtual organ computer aided analysis of three-dimensional ultrasound volume measurement with different rotation steps

作　　者：童放[1] 夏泽[1] 夏炳兰[1] 钱晓芹[1] 

机构地区：[1]扬州大学医学院附属苏北人民医院超声科,江苏扬州225001

出　　处：《中国医学影像技术》2009年第1期132-134,共3页Chinese Journal of Medical Imaging Technology

摘　　要：目的测试三维超声体积自动测量技术在不同旋转步长下的误差。方法将大小形状不同的离体新鲜猪肉组织块置于水囊中,对目标物进行三维容积采样后,启动三维超声体积自动测量程序,分别使用旋转步长30°、15°、9°、6°测量组织块的体积,记录数据并进行统计。结果使用旋转步长30°、15°、9°、6°的误差分别为(14.49±7.45)%,(10.93±5.97)%,(6.05±5.06)%和(12.92±6.77)%。测量体积与实际体积的相关回归方程分别为y=1.0642x+0.8374(r=0.9903),y=1.0674x+0.5093(r=0.9936),y=1.0235x+0.6614(r=0.9968),y=1.0514x+0.7767(r=0.9927),以上方程P<0.05。其中旋转步长为9°时,r值最大。不同旋转步长测量条件下,实际体积与相对误差的相关系数r值在0.2083～0.3762之间。结论三维超声体积自动测量技术对体积的测量结果与实际体积相关性较高,可用旋转步长为9°进行精测,30°进行估测。Objective To test the error of different rotation steps in order to better use virtual organ computer aided analysis with three-dimensional ultrasound. Methods Different sized sweetness meat was put into pouch of water. The object was scanned by three-dimensional ultrasound, and the volume was measured by the program of virtual organ computer aided analysis （VOCAL^TM） with different rotation steps such as 30°, 15°, 9° and 6°. The data was recorded and to be counted. Results The error of different rotation step such as 30°, 15°, 9°and 6°was （14.49±7.45）%, （10.93±5.97）%, （6.05±5.06）% and （12.92±6. 77）%, respectively. The regression equation was y= 1. 0642x-b-0. 8374 （r=0.9903）, y=1. 0674x＋0.5093 （r=0. 9936）, y= 1. 0235x＋0. 6614 （r=0. 9968） and y= 1. 0514x＋0. 7767 （r=0. 9927）, respectively （P〈0.05）. The biggest value of r was obtained when the rotation step was 9°. Conclusion VOCAL^TM can be used to measure the volume of object. The target can be accurately measured with the rotation step of 9°, while efficiently with the rotation step of 30°.

关 键 词：超声检查 体积自动测量技术 旋转步长 体模 显像术 

分 类 号：R445.1[医药卫生—影像医学与核医学] R-332[医药卫生—诊断学]