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为初测螺旋CT血管造影最佳扫描延迟时间,作者对20例患者进行了研究。男11例,女9例,年龄20～79岁(平均55岁)。使用Somatom Plus-S CT扫描机于胰腺及脾静脉水平以10mm层厚扫描,首先对患者“实验性”团注12ml造影剂(Telebrix 38-380mgI/ml),4～10min后再团注90ml。造影剂采用高压注射器经插于患者肘静脉的20G导管注入。测量主动脉、脾静脉及胰腺两次注射的绝对强化值。作连续密度测量的时间间隔在前30s内为3s,30～65s内为5s,剩余时间内为7s。分析两次注射的时间-密度曲线,测量从“实验性”团注开始到主动脉增强高峰的时间间隔,并与团注90ml造影剂后主动脉增强50HU、100HU及150HU所需时间比较。最后记录两种注射
For the first test spiral CT angiography best scan delay time, the authors of 20 patients were studied. There were 11 males and 9 females, aged from 20 to 79 years (average 55 years). Using a Somatom Plus-S CT scanner at the pancreas and splenic venous levels at a 10 mm slice thickness, patients were initially given a “experimental” bolus of 12 ml contrast medium (Telebrix 38-380 mgI / ml) and then re-bolted 90 ml after 4-10 min. Contrast media using a high pressure syringe inserted into the patient’s 20G catheter vein injection. Measure the absolute intensification of two injections of aorta, splenic vein, and pancreas. The time interval for continuous density measurement is 3 s in the first 30 s, 5 s in 30 to 65 s, and 7 s in the remaining time. The time-density curve of two injections was analyzed and the time interval from the “experimental” bolus injection to the aortic peak enhancement was measured and compared to the time required for 50, 100, and 150 HU aortic augmentation after bolus injection of 90 ml of contrast medium. Record the last two injections