中国临床医学
中國臨床醫學
중국림상의학
Chinese Journal of Clinical Medicine
2015年
4期
560-563
,共4页
肠系膜静脉%体层摄影术%X 线计算机%血管造影术
腸繫膜靜脈%體層攝影術%X 線計算機%血管造影術
장계막정맥%체층섭영술%X 선계산궤%혈관조영술
Mesenteric vein%Tomography,X-ray computer%Angiography
目的：：优化多层螺旋 CT 肠系膜静脉造影(MDCTV)成像技术。方法：将140例行全腹部 MDCT 增强扫描的患者根据扫描准直、重建层厚、对比剂浓度、注射速率和延迟时间分成7个组,每组20例。重建方法采用容积再现(VR)、最大密度投影(MIP)、薄层最大密度投影(TSMIP)。比较不同参数、重建方法显示血管的效果。结果：准直为0.6 mm 时,1.0 mm 和1.5 mm 重建层厚的 MDCTV 像优于0.6 mm 层厚,其中以1.0 mm 层厚最佳；0.6 mm 准直、1.0 mm 重建层厚的图像质量优于其他准直、层厚。370 mgI/mL 对比剂 MDCTV 像优于300 mgI/mL,差异有统计意义(P <0.05)。不同注射速率 MDCTV 差异无统计学意义(P >0.05)。静脉期延迟时间以动脉期延后25 s 最佳。对于肠系膜静脉的显示,MIP、TSMIP 优于 VR,使用高浓度的对比剂及1.0 mm 层厚重建可获得较高质量的图像。结论：0.6 mm 准直、1.0 mm 重建层厚、对比剂浓度370 mgI/mL、3.0 mL/s 注射速率、团注测试法确定动脉期延后25 s 为最佳 MDCTV 成像方案。
目的：：優化多層螺鏇 CT 腸繫膜靜脈造影(MDCTV)成像技術。方法：將140例行全腹部 MDCT 增彊掃描的患者根據掃描準直、重建層厚、對比劑濃度、註射速率和延遲時間分成7箇組,每組20例。重建方法採用容積再現(VR)、最大密度投影(MIP)、薄層最大密度投影(TSMIP)。比較不同參數、重建方法顯示血管的效果。結果：準直為0.6 mm 時,1.0 mm 和1.5 mm 重建層厚的 MDCTV 像優于0.6 mm 層厚,其中以1.0 mm 層厚最佳；0.6 mm 準直、1.0 mm 重建層厚的圖像質量優于其他準直、層厚。370 mgI/mL 對比劑 MDCTV 像優于300 mgI/mL,差異有統計意義(P <0.05)。不同註射速率 MDCTV 差異無統計學意義(P >0.05)。靜脈期延遲時間以動脈期延後25 s 最佳。對于腸繫膜靜脈的顯示,MIP、TSMIP 優于 VR,使用高濃度的對比劑及1.0 mm 層厚重建可穫得較高質量的圖像。結論：0.6 mm 準直、1.0 mm 重建層厚、對比劑濃度370 mgI/mL、3.0 mL/s 註射速率、糰註測試法確定動脈期延後25 s 為最佳 MDCTV 成像方案。
목적：：우화다층라선 CT 장계막정맥조영(MDCTV)성상기술。방법：장140례행전복부 MDCT 증강소묘적환자근거소묘준직、중건층후、대비제농도、주사속솔화연지시간분성7개조,매조20례。중건방법채용용적재현(VR)、최대밀도투영(MIP)、박층최대밀도투영(TSMIP)。비교불동삼수、중건방법현시혈관적효과。결과：준직위0.6 mm 시,1.0 mm 화1.5 mm 중건층후적 MDCTV 상우우0.6 mm 층후,기중이1.0 mm 층후최가；0.6 mm 준직、1.0 mm 중건층후적도상질량우우기타준직、층후。370 mgI/mL 대비제 MDCTV 상우우300 mgI/mL,차이유통계의의(P <0.05)。불동주사속솔 MDCTV 차이무통계학의의(P >0.05)。정맥기연지시간이동맥기연후25 s 최가。대우장계막정맥적현시,MIP、TSMIP 우우 VR,사용고농도적대비제급1.0 mm 층후중건가획득교고질량적도상。결론：0.6 mm 준직、1.0 mm 중건층후、대비제농도370 mgI/mL、3.0 mL/s 주사속솔、단주측시법학정동맥기연후25 s 위최가 MDCTV 성상방안。
Objective:To optimize multi-detector computed tomography venography(MDCTV)on mesenteric vein.Methods:One hundred and forty patients undergoing enhanced multi-detector computed tomography(MDCT)for whole abdomen were di-vided into seven groups according to collimation,reconstructed slice thickness,concentration of contrast medium,injection rate and delay time,with 20 in each group.Volume rendering (VR),maximum intensity projection (MIP)and thin-slab maximum intensity projection (TSMIP)were used for reconstruction.The effects of vascular imaging were compared among different pa-rameters and reconstruction techniques.Results:At 0.6 mm collimation,MDCTV with 1 .0 mm or 1 .5 mm slice thickness was superior to 0.6 mm regarding imaging,and there were statistically significant differences (P <0.05).And 1 .0 mm slice thick-ness was the best among them.MDCTV with 370 mgI/mL contrast medium was superior to that with 300 mgI/mL regarding imaging,and there was statistically significant difference(P <0.05).There was no significant difference among MDCTV with different injection rates regarding imaging.The optimal delay time of venous phase was 25 s later than the arterial phase.Re-garding the imaging quality of mesenteric vein,MIP and TSMIP were superior to VR,while high concentration of contrast me-dium and 1 .0 mm reconstructed slice thickness contributed to high quality imaging.Conclusions:The optimal protocol of MDCTVconsists of 0.6 mm collimation,1 .0 mm slice thickness,370 mgI/mL contrast medium,3.0 mL/s injection rate,and venous phase time being 25 s later than arterial phase which decided by test bolus.
