CT 检查时造影剂注射速率对肝脏强化的影响。
Effect of rate of contrast medium injection on hepatic enhancement at CT.
作者信息
Garcia P A, Bonaldi V M, Bret P M, Liang L, Reinhold C, Atri M
机构信息
Department of Diagnostic Radiology, Montreal General Hospital, McGill University, Quebec, Canada.
出版信息
Radiology. 1996 Apr;199(1):185-9. doi: 10.1148/radiology.199.1.8633144.
PURPOSE
To determine the effect of the rate of contrast medium injection on liver enhancement at computed tomography (CT).
MATERIALS AND METHODS
Forty-five patients who underwent a follow-up CT examination of the liver were included in five different groups according to the compared rates of contrast material delivery: group A, 2 versus 3 mL/sec; group B, 2 versus 4.5 mL/sec; group C, 3 versus 4.5 mL/sec; group D, 3 versus 6 mL/sec; and group E, 4.5 versus 6 mL/sec.
RESULTS
Time to peak enhancement was shorter for the faster rates of injection. In each group, maximum enhancement was nearly identical for the paired examinations (group A, 57 vs 58 HU; group B, 48 vs 47 HU; group C, 55 vs 58 HU; group D, 55 vs 54 HU; group E, 62 vs 61 HU, respectively). Mean enhancement in each group was similar when calculated at 3-second intervals.
CONCLUSION
Higher rates of injection shorten the time to peak liver enhancement but have no effect on maximum liver enhancement.
目的
确定对比剂注射速率对肝脏计算机断层扫描（CT）增强效果的影响。
材料与方法
45例接受肝脏随访CT检查的患者，根据对比剂注射速率分为5组：A组，2ml/秒与3ml/秒；B组，2ml/秒与4.5ml/秒；C组，3ml/秒与4.5ml/秒；D组，3ml/秒与6ml/秒；E组，4.5ml/秒与6ml/秒。
结果
注射速率越快，达到峰值增强的时间越短。在每组中，配对检查的最大增强值几乎相同（A组分别为57HU和58HU；B组为48HU和47HU；C组为55HU和58HU；D组为55HU和54HU；E组为62HU和61HU）。以3秒间隔计算时，每组的平均增强值相似。
结论
较高的注射速率可缩短肝脏达到峰值增强的时间，但对肝脏的最大增强效果无影响。
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