Using digitized 3Dmodel for assessing characteristics of pelvic and abdominal vessel imaging of CTA and MRA / 重庆医学

ABSTRACT

Objective To construct the digitalized 3 dimensional(3D)model by using the CTA and MRA original images and to assess the differences in the pelvic and abdominal vessel display between CTA and MRA.Methods The original data set in 25 healthy youth female cases of CTA and MRA were collected.The datasets,reconstructed the 3D models of arteries and venous on 3D reconstruction software Mimics10.0 was used to construct the 3D model of pevic and abdominal vessels.The reconstruction situation of abdominal aorta,inferior vena cava,common iliac artery and common iliac venous,internal and external iliac artery and iliac venous,uterine artery,obturator artery and obturator venous,hip artery and its branches,internal pudendal artery,middle sacral artery and venous,ovarian artery and venous and sacral venous plexus were observed.Moreover the chi-square test was used to analyze whether the above vessel display rate having differences between the two kinds of model.Results The abdominal aorta,inferior vena cava,common iliac artery and common iliac venous,internal and external iliac artery and iliac venous and uterine artery almost reached 100 ％ display.The display rates of CTA model for right and left obturator artery and venous were 92 ％,80 ％,44 ％ and 32 ％ respectively,while which of MRA model were 84 ％,72 ％,36 ％ and 4％ respectively,the difference was not statistically significant(P =0.382,P=0.508,P =0.564,P =0.382).The sacral venous plexus,including S1,2,3,4 transverse vein,the display rates in 25 cases of CTA 3D models were 4％,8％,0％and 4％respective,while which of MRA models were 76％,92％,96％and 44％respectively,the differences between them were statistically significant(P＜0.01,P＜0.01,P＜0.01,P=0.01).Conclusion Based on the observation of 3D models,the displaying rate of grade 4 pelvic and abdominal vessels has no statistical difference between MRA imaging technology and currently widely used CTA technology,moreover the MRA technology is superior to the CTA technology in presacral vessel net display.