Objective To study the DR (Digital Radiography) image re-photography factors resulting from bad image quality and related improvement measures. Methods Altogether 98503 cases in PACS (Picture Archiving and Communication System) were analyzed retrospectively to analyze the factors of the DR image re-photography and put forward related improvement measures. Pre- and post-improvement DR image re-photography ratios were compared. Results The DR image re-photography ratio was 4.89%and factors that caused re-photography included wrong position (2697 cases, 56.05%), foreign materials (990 cases, 20.57%), patients’ mobility (577 cases, 11.99%), machine fault (355 cases, 7.37%) and the inappropriate X-ray dosage (193 cases, 4.02%). Having taken improvement measures, the ratio of the DR image re-photography reduced from 4.38% to 3.81% in 6 months. Conclusion Regular analysis of the DR image re-photography factors and formulation of related improvement measures could improve the image quality, which were also effective measures for quality control and quality assurance.%目的：探讨数字化X线摄影（Digital Radiography，DR）因图像质量不佳所致重新摄片的因素以及相应的改善策略。方法回顾性分析PACS系统中98503例DR图像，分析影像重摄的因素并提出相应的改善策略，比较采用改善策略前后DR图像重摄率的差异。结果 DR影像整体重摄率为4.89%，造成重摄的因素为体位不正（2697例，占56.05%）、异物（990例，占20.57%）、病人移动（577例，占11.99%）、机器因素（355例，占7.37%）和剂量因素（193例，占4.02%）。采用改善方案后，6个月内影像重摄率从4.38%降至3.81%。结论定期分析图像重摄因素并制定相应改善策略，可以提高影像质量，是质量控制和管理的有效措施。
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