Clinical Application of Multi-slice Spiral CT 3D Angiography

Objective To study the technique of multi-slice spiral CT 3D angiography(CTA) and it's clinical appliction.Methods Multi-slice spiral CT angiography(CTA)in 71 cases were analyzed including intracranial vascular CTA 12 cases, thoracic vascular 9 cases, abdominal 23 cases, low extremity 7 cases, carotid 8 cases, renal artery 12 cases. Media contrast were used in 1.5～2ml/kg, the rate of injection were 2.5～3ml/s.Three ways of scan delay time were applied, that was bolus tracking,test bolus and calculating time. Data reconstruction were done with Real time 3D and Fly 3D and MPR in working-station.Results In intracranial CTA, there were intracranial aneurysm 6, AVM 1, normalities 5. On thoracic CTA, lung arterio-venous fistula in 3, lung arterious embolism in 1, thoracic aortic dissection in 3, and normalities in 2 were showed. In abdominal CTA, abdominal aortic aneurysms were 5, dissection were 15, normalities were 3. In renal arteries CTA, left renal artery stenosis were 3, right renal artery stenosis were 2, normalities were 7. In low extremity CTA, artifical vessel was 1, calcification in both femoral artery was 1; aneurysm in both femoral artery was 1,normalities were 4. In carotid artery, calcification in both sides was 1, normalities were 7.The vascular cavity,calcic spots and abdominal aortic dissection could be showed on CTA. Conclusion Multi-slice spiral CT angiography (CTA) can show 3D vascular structure in whole body, CTA is helpful in guiding vascular operation and stent transplantation