| 莫 佳,徐克虎,陈孝威,王绥煌,于洪林,马 涛.DDR线阵探测器的校正方法研究[J].中国医学影像技术,2003,19(7): |
| DDR线阵探测器的校正方法研究 |
| Study on the Calibration Method of DDR Linear Array Detector |
| 投稿时间：2003-01-07 |
| DOI： |
| 中文关键词: 2048线阵探测器 DDR技术 X射线 校正 最小二乘法 |
| 英文关键词:2048 linear array detector DDR technology X-ray Calibration Least square method |
| 基金项目: |
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| 摘要点击次数: 2013 |
| 全文下载次数: 930 |
| 中文摘要: |
| 目的 提高2048线阵探测器的校正质量。方法 对在常见的成像条件下曝光的梯模、线对卡图像进行测量、分析,利用最小二乘法计算各通道的校正因子。结果 ①对本底噪声进行有效的抑制,使得本底近似为零;②使得在有X射线和无X射线两种条件下敏感度不同的各通道取得了较好的一致性。结论 采用本方法能在常见的成像条件下较大地提高校正质量,具有通用性。 |
| 英文摘要: |
| Objective To improve the calibration quality of 2048 channels linear array detector.Methods The least square method was adopted to calculate the calibration factors in the channels when measuring and analyzing the aluminum ladder model and line-pair-card images that had been exposed under the common conditions of shaping images.Results Background noise was effectively held almost to none,and a better consistency between different sensitive channels was achieved regardless of the X-ray.Conclusion The calibration quality will be enhanced to a great extent under the common imaging conditions by adopting the least square method. |
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