四川大学学报（医学版）2013，Vol.44Issue(4)：578-583,6.
CT冠脉成像中胸廓径线与图像质量的相关性研究
Image Quality Adapted Thoracic Diameters in CT Coronary Artery Imaging
潘雪琳 1孙家瑜 1程巍 1邓开鸿 1张菊英 2罗云梅 3白红利 1余建群 1袁元1
作者信息
- 1. 四川大学华西医院放射科 成都 610041
- 2. 四川大学华西公共卫生学院统计学教研室 成都 610041
- 3. 《中国普外基础与临床杂志》编辑部 成都 610041
- 折叠
摘要
Abstract
Objective To evaluate the correlation between image quality and thoracic diameters,anteroposterior diameter (AP) and right-left diameter(RL) for the optimization of reducing radiation dose in coronary artery imaging with Dual-source CT.Methods 118 patients underwent CT coronary artery imaging (CTCA)were divided into two groups (A and B) according to body mass index (BMI).There were 58 patients in group A with BMI values ≥25 kg/m2 and ＜30 kg/m2 ; and 60 patients in group B with BMI values ＜25 kg/m2.Scan parameters:collimation 64 × 0.6 mm,reconstruction slice thickness 0.75 mm,reconstructin interval 0.7 mm,FOV 150-180 mm,the pitch adjusted according to heart rate automatically.CT imagings were obtained with tube voltage 100 kV,tube current 330 mAs (group A) and 100 kV,tube current 220 mAs (group B).The contrastnoise ratio (CNR),signal to noise ratio (SNR),as well as blind correlation test score values were calculated to establish the relationship among BMI,AP,RL and CNR,SNR; Results RL of five levels in groups of A,B were correlated to CNRa (P＜0.05).In group A and B (except iii,iv level of Group A),AP were associated with CNRa (P＜0.05).In addition to if,iv level of group A,v level of group B,BMI were associated with CNRa (P＜0.05).The correlation coefficient of CNRa and RL of group A except ii level was greater than that of CNRa and AP.The correlation coefficient of CNRa,SNRa and RL of group B was greater than that of CNRa,SNRa and AP.Except iii level,the correlation coefficient of CNRa,SNRa and AP of group A was greater than that of CNRa,SNRa and BMI.Except ii level,the correlation coefficient of CNRa and AP of group B was greater than that of CNRa and BMI.Conclusion Thoracic diameter of RL can be used as a guider to select the appropriate scan protocol in the coronary imaging acqusition with dual-source CT.关键词
双源CT/冠脉成像/体质量指数/胸廓径线Key words
Dual-source CT/Coronary artery imaging/Body mass index/Thoracic diameters引用本文复制引用
潘雪琳,孙家瑜,程巍,邓开鸿,张菊英,罗云梅,白红利,余建群,袁元..CT冠脉成像中胸廓径线与图像质量的相关性研究[J].四川大学学报（医学版）,2013,44(4):578-583,6.
