200例膈下动脉的256层螺旋CT影像学分析

目的利用Philips 256层螺旋CT增强扫描动脉期图像分析膈下动脉(IPA)的CT表现,为血管介入科医师提供参考信息。方法连续观察200例行Philips 256层螺旋CT双期增强扫描(腹部174例,胸腹联合26例)患者IPA的数目、起源、管径及是否参与肿瘤供血。结果 200例患者右膈下动脉(RIPA)均显示,共为201支;198例患者左膈下动脉(LIPA)显示,2例LI-PA未显示,共203支。IPA一侧2支的6例,占3.0%。IPA左右共干的为24.0%;RIPA及LIPA起自同一血管但不共干的为29.0%;RIPA起自腹腔干的为34.8%,主动脉为40.8%,右肾动脉为18.4%,右副肾动脉为2.0%,胃左动脉为4.0%;LIPA起自腹腔干的为55.7%,主动脉为37.9%,胃左动脉为5.4%,脾动脉为1.0%。9例共10支IPA参与肿瘤供血,9支RIPA,1支LIPA。正常组RIPA管径(2.01±0.40)mm,LIPA管径(1.92±0.42)mm。肿瘤组RIPA管径(2.53±0.44)mm,LIPA管径(2.15±0.79)mm。正常组RIPA和LIPA管径比较差异有统计学意义(P<0.05)。肿瘤组和正常组RIPA管径比较差异有统计学意义(P<0.01)。结论利用Philips 256层螺旋CT增强扫描动脉期图像能够显示IPA的数目、起源、管径及是否参与肿瘤供血,可以作为首选的非创伤性检查方法,为血管介入科医师提供重要的术前参考信息。

Imageological analysis of 256-slice spiral CT scan in 200 cases of inferior phrenic artery

Objective To analyze the CT manifestations of inferior phrenic artery(IPA) by enhancement artery-phase scan images to provide reference for doctors in the interventional department.Methods To continuously observe the amount,origin,caliber of IPA and whether IPT participating in tumorous blood supply in 200 cases of enhancement biphase scan(174 cases of abdomen and 26 cases of chest-abdomen) by Philips 256-slice spiral CT.Results 200 cases of right IPA(RIPA) were all shown,201 branches altogether;198 cases of left IPA(LIPA) were shown and 2 cases of LIPA were not shown,203 branches altogether.There were 6 cases(3%) of two branches in either side;24 % of IPA was left and right sharing same trunk;29% of IPA was originated from the same blood vessel without sharing the same trunk.RIPA was originated from the celiac trunk in 34.8%,the aorta in 40.8%,the right renal artery in 18.4%,the right accessory renal artery in 2.0% and the left gastric artery in 4%.LIPA was originated from the celiac trunk in 55.7%,the aorta in 37.9%,the left gastric artery in 5.4% and the spleen artery in 1.0%.10 branches of IPA including 9 branches of RIPA and 1 branch of LIPA participated in the blood supply of tumor in 9 cases.The caliber of RIPA in the normal group was(2.01±0.40) mm and which of LIPA was(1.92±0.42)mm.The caliber of RIPA in tumor group was(2.53±0.44) mm and which of LIPA was(2.15±0.79)mm.The caliber had statistical difference between RIPA and LIPA in the normal group(P<0.05);significant statistical difference was found in the caliber of RIPA between the tumor group and the normal group(P<0.01).Conclusion The amount,origin,caliber of IPA and whether participating the blood supply of tumor can be shown in enhancement artery-phase scan with Philips 256-slice spiral CT,which can be taken as preferred nontraumatic examination method to offer important preoperative reference information for doctor in the interventional department.