High-Pitch Dual-Source Computed Tomography Renal Angiography Comparison With Conventional Low-Pitch Computed Tomography Angiography: Image Quality, Contrast Medium Volume, and Radiation Dose

作者：Pang, LiFang; Zhao, Yue; Dong, HaiPeng; Shi, HongCheng; Yang, WenJie; Zhang, Huan; Yan, FuHua^*; Liu, Bo; Yan, Jing

来源：Journal of Computer Assisted Tomography, 2015, 39(5): 737-740.

DOI：10.1097/RCT.0000000000000268

• computed tomography
• contrast media volume
• dual-source CT
• high pitch

Objective The objective of this study was to compare the image quality (IQ), contrast medium (CM) volume, and radiation dose of the high-pitch renal computed tomography angiography (CTA) with low-pitch protocol. @@@ Methods Fifty patients underwent renal CTA on a dual-source 128-slice scanner via a high-pitch mode (pitch = 2.05) with 0.5-mL/kg CM injection, whereas 50 patients were also scanned on the same scanner with low-pitch (pitch = 0.6) and 1.0 mL/kg CM injection. Subjective IQ was evaluated. Objective IQ was determined by the signal-to-noise ratio and contrast-to-noise ratio. Effective radiation dose was also evaluated. @@@ Results The contrast-to-noise ratio and signal-to-noise ratio values as well as the IQ scores between the 2 groups had no significant differences (P > 0.05). The effective radiation dose of the high-pitch group was significantly lower (P < 0.05). @@@ Conclusions High-pitch scan can provide similar subjective and objective IQ compared with low-pitch protocol for renal CTA, whereas CM volume and radiation exposure were significantly reduced.

• 出版日期2015-9
• 单位复旦大学; 上海交通大学; 上海市闵行区中心医院