MSCTA（16层）成像技术应用探讨

目的探讨多排螺旋CT血管造影（MSCTA）成像技术的应用。方法48例患者行多排螺旋CT血管造影成像，其中头颅3例，胸部27例，腹部12例，冠状动脉6例，造影剂采用1．5—2ml／kg（Omnipaque 3001mg／ml），注射速率为3ml／s，延迟时间采用Blous tracting（造影剂跟踪技术），将原始数据传入工作站进行各种功能重建。结果头颈部动脉系统扫描延迟时间为12—16秒，胸腹部动脉系统延迟时间为12—15秒，髂动脉为20—30秒。VR法重建的血管图像优于MPR，MIP和SSD。结论MSCTA是一种快速、大范围、无创性的血管成像技术，VR法是一种理想的三维重建方法。

The application of multi- slice spiral CT angiography technique

Objective To explore the application of multi-slice spiral CT angiography(MSCTA).Methods Fourty-eight patients underwent multi-slice spiral CT angiography,in which there were 3 cases of brain,27 cases of chest,12 cases of abdomen and 6 cases of coronary artery.Contrast agent of 1.5-2ml/kg(Omnipaque 300 I mg/ml)was injected and the injection rate was 3 ml/s.The delay time was determined by bolus tracking technique.Original data were transferred to working-station to perform functional reconstruction.Results The delay time was 1216s for head and neck artery,12-15s for chest and abdomen artery and 20-30s for iliac artery.VR(Volume rendering) is better than MPR(multi-planar reconstruction),MIP(maximum intensity projection) and SSD(shaded surface display) to display artery.Conclusion MSCTA is a quick,large coverage and non-invasive angiography technique.VR is an ideal three-dimensional reconstruction method.