Sixteen-detector row CT angiography of carotid arteries:: Comparison of different volumes of contrast material with and without a bolus chaser
Sixteen-detector row CT angiography of carotid arteries:: Comparison of different volumes of contrast material with and without a bolus chaser
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DOI：
10.1148/radiol.2372040653
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发表时间：
2005-11-01
期刊：
影响因子：
19.7
通讯作者：
van Der Lugt, A
中科院分区：
文献类型：
--
作者：
de Monyé, C;Cademartiri, F;van Der Lugt, A
目的：前瞻性比较不同体积的静脉注射造影剂，使用或不使用推注追踪器，在 16 排计算机断层扫描 (CT) 颈动脉血管造影中进行。 材料和方法：获得机构审查委员会的批准和知情同意。 75 名连续患者（44 名男性，31 名女性；平均年龄，63 岁；范围，22-85 岁）被分配到三个方案之一：第 1 组，80 mL 造影剂；第 1 组，80 mL 造影剂；第 1 组，80 mL 造影剂；第 1 组，80 mL 造影剂；第 1 组，80 mL 造影剂；第 2 组； 80 mL 造影剂，随后加入 40 mL 盐水；对照组，3.60 mL 对比材料，随后 40 mL 盐水。推注追踪用于使造影剂注射与 CT 扫描同步。从升主动脉到颅内动脉，每隔 1 秒测量一次以 Hounsfield 单位表示的衰减。使用Student t 检验检验差异。结果：所有组中的近端颈内动脉、动脉均达到最大衰减。将推注追踪器添加到 80 mL 造影剂中。导致较高的平均衰减（323 HU +/- 39 vs 351 HU +/- 60，P =.06）、较高的最大衰减（393 HU +/- 53 vs 425 HU +/- 76，P =.09）和较高的最小衰减（240 HU +/- 34 vs 264 HU +/- 48，P < .05）。第 3 组的平均、最大和最小衰减低于第 1 组和第 2 组 (P < .001)。结论：在 80 mL 造影剂中添加推注追踪器会导致稍高的衰减。将造影材料的体积从 80 mL 减少到 60 mL 会导致衰减显着降低。 (c) 北美放射学会，2005 年。
PURPOSE: To prospectively compare different volumes of intravenously administered contrast material with and without, bolus chaser at 16-detector row computed tomographic (CT) angiographic of the carotid arteries.MATERIALS AND METHODS: Institutional Review Board approval and informed consent were obtained. Seventy-five consecutive patients (44 men, 31 women; mean age, 63 years; range, 22-85 -years) were, allocated to one of three protocols: group 1, 80 mL of contrast material; group 2; 80 mL of contrast material followed by 40 mL of saline; and group, 3,60 mL of, contrast material followed by 40 mL of saline. Bolus tracking was used to synchronize contrast material injection with CT scanning. The attenuation in Hounsfield units was measured from the ascending aorta to the intracranial arteries at 1-second intervals. Differences were tested with the Student t test.RESULTS: The maximum attenuation, was reached in the proximal internal carotid, artery in all groups. The addition of a bolus chaser to 80-mL contrast material. resulted in a higher mean attenuation (323 HU +/- 39 vs 351 HU +/- 60, P =.06), higher maximum attenuation (393 HU +/- 53 vs 425 HU +/- 76, P =.09), and higher minmum attenuation (240 HU +/- 34 vs, 264 HU +/- 48, P < .05). Group 3 had lower mean, maximum, and minimum attenuation than did groups 1 and 2 (P < .001).CONCLUSION: The addition of a bolus chaser to 80 mL of contrast material results in a slightly higher attenuation. Decreasing the volume of contrast material from 80 to 60 mL results in a significantly lower attenuation. (c) RSNA, 2005.