Aorto-iliac multidetector-row CT angiography with low kV settings: improved vessel enhancement and simultaneous reduction of radiation dose
Aorto-iliac multidetector-row CT angiography with low kV settings: improved vessel enhancement and simultaneous reduction of radiation dose
复制标题
DOI：
10.1007/s00330-004-2575-y
复制
发表时间：
2005-02-01
影响因子：
5.9
通讯作者：
Becker, C
中科院分区：
文献类型：
--
作者：
Wintersperger, B;Jacobs, T;Becker, C
本研究的目的是使用100 kVp执行腹部CT血管造影方案，并将SNR和CNR以及主观图像质量与在16探测器行CT扫描仪上使用120 kVp的标准CT血管造影方案进行比较。48例患者在16排CT扫描仪上进行常规腹部CT血管造影。在恒定mAs设置下使用120或100 kVp扫描患者。使用类似的注射方案通过自动注射对比剂来提供血管浑浊。沿着髂动脉-髂动脉轴进行密度测量，并计算SNR和CNR。此外，还计算了估计的有效患者辐射剂量。比较两种方案的结果。100-kVp方案（432180 HU）显示血管密度显著高于120-kVp方案（333 /- 90 HU; P
The aim of the study was to implement an abdominal CT angiography protocol using 100 kVp and to compare SNR and CNR, as well as subjective image quality, to a standard CT angiography protocol using 120 kVp on a 16 detector-row CT scanner. Forty-eight patients were referred for routine abdominal CT angiography on a 16 detector-row CT scanner. Patients were scanned using either 120 or 100 kVp at constant mAs settings. Vessel opacification was provided by automated contrast injection using similar injection protocols. Density measurements were performed along the aorto-iliac axis with SNR and CNR calculation. In addition, the estimated effective patient radiation dose was calculated. Results of both protocols were compared. The 100-kVp protocol (432180 HU) showed a significantly higher vessel density than the 120-kVp (333 /- 90 HU; P