| 摘要: |
| ［摘要］ 目的 探讨计算机摄影（CR）伪影的产生原因及解决办法。方法 通过分析CR系统各种伪影的特点，从扫描器的机械结构、工作原理、IP板的构造、影像处理、操作者的错误等方面阐述CR伪影的产生原因。结果 伪影大概可分为：前后次影像重叠伪影、IP板扫描中卡片引起的伪影、“流空效应”伪影、灰尘引起的伪影、ＩP受损引起的伪影、摄影条件过高产生的伪影、散射线引起的伪影、扫描过程中外来光线引起的伪影等方面。结论 正确认识CR伪影产生的原因，并采取相应的预防措施就能尽量防止伪影的产生，大大提高CR的影像质量。 |
| 关键词: 伪影 影像质量 计算机摄影 |
| DOI：10.3969/j.issn.1674-3806.2009.07.27 |
| 分类号:R 814.43 |
| 基金项目: |
|
| Discussion on the artifacts of computed radiography and its solution |
|
ZOU Cai-sheng
|
|
Department of Radiologr, Beihai People′s Hospital, Beihai 536000, China
|
| Abstract: |
| ［Abstract］ Objective To discuss the productive reasons of the artifacts of computed radiography （CR）and its solution.Methods Through analysis of the characteristics of various kind of artifacts in CR system, from scanner′s mechanism, the principle of work, IP board′s structure, image process, operator′s errors and so on the CR artifacts productive reason were discussed.Results The artifacts may been divided into: the artifacts induced by the overlap of pre and post images，the artifacts induced by the card in the TP board scanning, the artifacts induced by “the class spatial effect”， the artifacts induced by the dust, the artifacts induced by injured TP, the artifacts induced by the excessive photographic condition, the artifacts induced by the disperse beam, and the artifacts induced by the external optical fiber in the scanning process.Conclusion Understood correctly the reason of the CR artifacts, can prevent the production of the artifacts as far as possible, greatly enhances the image quality of CR. |
| Key words: Artifacts Tmage quality Computed radiography(CR) |
