16层螺旋CT外周动脉血管造影术的临床应用

Clinical Application of 16-slice Spiral Peripheral Artery Angiography

目的：探讨16层螺旋CT在外周血管疾病中成像技术及临床应用价值。材料和方法：对21例临床怀疑周围血管疾病的患者,行多层螺旋CT血管造影（MSCTA）。扫描范围1100-1200mm,层厚2mm,重叠50%,螺距0.75,准直16×1.5,球管旋转时间0.75s,智能跟踪自动触发扫描,扫描时间20-35s。造影剂量100ml,注射速度3ml/s。对全部图像行最大密度投影（MIP）、多平面重建（MPR）、曲面重建（CPR）、容积再现（VR）,并对图像进行评价。21例中3例行DSA检查,4例行手术治疗。结果：MSCT动脉成像可以清晰地显示上肢动脉和腹主动脉及髂总动脉、髂内外动脉、股动脉、胫动脉、腓动脉的主干及分支。21例中,8例表现为不同部位、不同程度的动脉粥样硬化,急性动脉血栓2例,双侧髂总动脉瘤1例,外伤性假性动脉瘤1例,股动脉外伤性动脉损伤2例,医源性损伤1例,正常表现6例。结论：MSCT血管成像是一项高度准确的成像技术和侵袭性小的检查方法,已成为临床诊断外周血管疾病的首选方法。

Purpose： To study the techniques and clinical value of 16- slice CT in the peripheral vascular diseases. Materials and Methods： Twenty-one patients with suspected peripheral vascular diseases underwent the contrast-enhance MSCT FOV was 1100 - 1200mm, Slice thickness was 2mm, Slice increanent was lmm, Pitch was 0.75, Collimation was 16 × 1.5, the bulb revolves 0.75s/, the intelligent tracking and autotrigger scanning were performed scanning time was 20 N 35s. radiography dosage was 100ml, injection speed was 3ml/s. MIP, MPR, CPR and VR after conventional images and made appraisal for the images. 3 patients underwent DSA inspections, 4 patients underwent surgical treatment. Results ： The MSCT images of artery can display abdominal aorta, arteria iliaca communis, the ilio-exterior and interior arterties, the femoral artery, tibial artery and fibular artery. Ther were atherosclerosis （ n = 8 ）, acute artery thrombus （ n = 2）, common iliac aneurysm （ n = 1 ）, traumatic pseudoaneuryism （ n = 1 ）, femoral artery damage （ n = 2 ）, iatrogenie injury （ n = 1 ）, and normal feature （ n = 6）. Conclusions ： MSCT is a highly accurate and a less-invasive technique for peripheral vascular diseases. It has become the first choice in diagnosis of peripheral vascular diseases.