Impact of imaging quality of change pitch on coronary CTA with 64-detector row CT

VernacularTitle:调整螺距对64层螺旋CT冠状动脉成像图像质量的影响
Author: Xiang LI ; Chaolin JIN ; Shutong ZHANG
Publication Type:Journal Article
Keywords: Coronary artery; Angiography; Tomography; X-ray computed tomography; Pitch
From: Chinese Journal of Radiological Medicine and Protection 2009;29(3):323-325
CountryChina
Language:Chinese
Abstract: Objective To investigate the impact of imaging quality of pitch on coronary CT angiography (CTA) with 64-detector row CT. Methods 566 patients were divided into four groups according to heart rate (≤ 50,51-70,71 ～ 80 and ≥ 80 bpm). Three dimensional reconstructions were used such as volume rendering (VR) ,maximum intensity projection(MIP) and curved planar reformation(CPR). Each group was divided into control group and cxperimential group randomly, using normal pitch and revised pitch respectively, and the imaging quality and influencing factons were analyzed among the four groups. Results There was significant difference in imaging quality among the four groups (P < 0.05). Each group had difference in imaging quality with normal pitch and revised pitch. Conclusions The revised pitch helps to improve the imaging quality and meet the demand of diagnosis.