Hollett M D, Jorgensen M J, Jeffrey R B
Department of Radiology, Stanford University Hospital, CA 94305, USA.
Radiology. 1995 May;195(2):359-61. doi: 10.1148/radiology.195.2.7724753.
To determine the improvement in pancreatic enhancement at helical computed tomography (CT) performed with an early delay after administration of contrast material compared with that performed with a standard delay.
Dual-phase helical CT of the abdomen was performed in 120 patients with a 150-mL bolus of contrast material infused at 5 mL/sec. Early and standard delayed scanning was performed beginning at 20 seconds and 49-71 seconds, respectively. Regions of interest were measured in the head, body, and tail of the pancreas in 92 patients. The difference in enhancement between early and standard delayed scanning was calculated.
Mean pancreatic enhancement was 82 HU +/- 3 (standard error) with an early delay, whereas enhancement on standard delay scans was 62 HU +/- 2 (P < .001). An improvement in enhancement greater than 10 HU was attained in 66 of 92 cases (72%).
Pancreatic enhancement at helical CT with an early delay after contrast material administration is often significantly greater than the enhancement seen with a standard delay when a monophasic, rapidly infused bolus of contrast material is used.
确定与标准延迟扫描相比，在注射造影剂后进行早期延迟扫描的螺旋计算机断层扫描（CT）时胰腺强化的改善情况。
对120例患者进行腹部双期螺旋CT检查，以5 mL/秒的速度注入150 mL造影剂团注。分别在20秒和49 - 71秒开始进行早期和标准延迟扫描。在92例患者的胰腺头部、体部和尾部测量感兴趣区。计算早期和标准延迟扫描之间强化的差异。
早期延迟扫描时胰腺平均强化为82 HU±3（标准误差），而标准延迟扫描时强化为62 HU±2（P <.001）。92例中有66例（72%）强化改善大于10 HU。
当使用单相、快速注入的造影剂团注时，注射造影剂后进行早期延迟扫描的螺旋CT胰腺强化通常明显大于标准延迟扫描时的强化。
