| 李娟,胡志海,贺文.应用CDRAD 2.0模体定量评价DR成像的密度分辨力[J].中国医学影像技术,2011,27(10):2146~2148 |
| 应用CDRAD 2.0模体定量评价DR成像的密度分辨力 |
| Quantitative evaluation of density resolution of DR images with CDRAD 2.0 phantom |
| 投稿时间：2011-03-28 修订日期：2011-07-04 |
| DOI： |
| 中文关键词: CDRAD 2.0 密度分辨力 放射摄影术 |
| 英文关键词:CDRAD 2.0 Density resolution Radiography |
| 基金项目: |
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| 中文摘要: |
| 目的 应用CDRAD 2.0模体对数字影像(DR)的密度分辨力进行定量评价。 方法 用两台Philips DR机对CDRAD 2.0模体进行数字化成像,设备1投入使用时间为7年,设备2使用时间为17个月。用匹配软件处理数据资料,计算IQFinv值,比较两台设备的密度分辨力差异。 结果 设备1的IQFinv均值为2.31,设备2的IQFinv均值为2.81,二者差异有统计学意义(t=7.855,P<0.01)。 结论 采用CDRAD 2.0模体可定量分析DR设备的密度分辨力。 |
| 英文摘要: |
| Objective To evaluate the density resolution of digital radiology (DR) system subjectively by using CDRAD 2.0 phantom. Methods Digital radiograms of CDRAD 2.0 phantom were obtained by two Philips DR system (Unit 1 and Unit 2), the using time of which was 7 years and 17 months, respectively. The image data were analyzed with the processing software of the phantom. IQFinv value defined in a formula was calculated of each modality. Results IQFinv value of Unit 1 was 2.31, that of Unit 2 was 2.81. There was statistical difference between the two units (t=7.855, P<0.01). Conclusion The density resolution of DR can be quantitatively evaluated using CDRAD 2.0 phantom. |
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