【摘要】 目的分析影响床旁移动数字化X线摄影系统(digital radiography,DR)图像质量的常见因素,对其进行动态控制与管理,以提高床旁图像质量,降低患者辐射剂量。方法搜集存在图像质量问题的不同部位床旁DR照片共109张,经2名放射科主任医师和2名高年资影像技术人员参考卫生部"三甲"医院数字化图像质量评价标准,对其出现问题的现象、原因,逐片进行分析、讨论和统计。结果存在图像质量问题的床旁DR照片109张,其中后处理参数调整不合理31张(28.4%),摄影条件选择不当29张(2 6.6%),投照体位不标准8张(7.3%),录入患者信息错误2张(1.9%),左右号码标记错误3张(2.7%),排版打印格式不规范2张(1.9%),照片图像画面比例不协调8张(7.3%),照射野过大或过小6张(5.5%),体外异物伪影9张(8.3%),中心线入射不正确2张(1.9%),滤线栅切割效应9张(8.2%)。结论选择合适的摄影条件、严格按照规范操作、合理应用后处理技术以及各项后处理参数值的调整和匹配是保证图像质量的关键。更多还原

【Abstract】 Objective To improve the quality of the beside mobile digital radiography(DR) image and reduce the patients ’ radiation dose by analyzing the common factors of affecting bedside DR image quality to achieve dynamic control and management. Methods One hundred and nine unqualified beside DR images of different body parts were collected. The images were recorded. Regarding the phenomena and reasons of the unqualified DR images,3 experienced and professional radiographers analyzed,discussed and counted all the images one bye one with reference to the top-class hospitals ’digital image evaluation standard from the Ministry of Health. Results Among the 109 images,31 cases(28. 4%) of adjustment of post-processing parameters and 29 cases(26. 6%) of selection of radiographic conditions are inappropriate. Eight cases(7. 3%) of radiography positions are not standard. Two cases(1. 9%) of recording the patients’ information and 3 cases(2. 7%) of marking the left and right numbers are wrong. Two cases(1. 9%) of the typesetting and printing format are not standardized. Eight cases(7. 3%) of the proportion of the photo image are uncoordinated. 6 cases(5. 5%) of radiation field were too large or too small. There are 9 cases( 8. 3%) of artifact for the extracorporeal foreign matter. Two cases(1. 9%) of the incidence of the X-ray center line are incorrect. There are grid decentering effect in9 cases(8. 2%). Conclusion Selecting the suitable photography conditions,operating strictly according to the standard rules,using the post-processing techniques appropriately,adjusting and matching the post-processing parameter are all the key points to improve the quality of the bedside DR image.更多还原