新生儿床旁计算机X线摄影胸片图像质量的影响因素评价

Assessing the influence factors for neonatal bedside chest CR image quality

目的评价新生儿床旁计算机X线摄影(computed radiography,CR)胸片图像质量及其影响因素。方法回顾性分析我院新生儿床旁胸片103例,由2位医师分别在PACS工作站上进行图像质量评级,并且分析影响摄片质量的因素。结果在参评的胸部床旁摄影片中,曝光条件合适的,即lgM值在1.8~2.2区间的有73份(占70.9%),两位观察者之间的评级一致性为优(Kappa值=0.93),其间两医师所评甲片率分别为36.9%和32.0%,废片率均为0。其中,影像噪声、体位不正、对比度差及异物伪影等因素为影响摄片质量的主要因素,观察者之间的一致性为优(Kappa值=0.87)。结论新生儿床旁CR胸片质量的影响因素是可控的,通过仔细的操作及后处理可获得高质量的图像。

Objective To assess the imaging quality of neonatal bedside chest computed radiography images and analyze its influence factors. Methods The bedside chest films of 103 patients were obtained with computed radiography in our hospital. Imaging quality of these patients was assessed and its influence factors were analyzed, respectively. Results Of all the images, there were 73 ones （about 70.9%） having proper exposure conditions （lgM value between 1.8~2.2）, the imaging quality were assessed by two experienced radiologists and excellent agreement was ol^tained （kappa=0.93）. Beside, the highest quality rate was 36.9% from radiologist A, while was 32.0% from radiologist B, no junk films. Influence factors of neonatal bedside chest CR images were analyzed, including image noise, improper posture, poor contrast and foreign body artifact photographs and other factors, while two observers＇ excellent agreement was obtained （kappa=0.87）. Conclusion Influence factors of neonatal bedside chest CR image can be controlled by careful operation and post-processing so as to obtain high-quality images.