| 戚永娟,余晓锷,王甜甜,简峻.CT机时间分辨力的体模测试方法[J].中国医学影像技术,2011,27(11):2322~2325 |
| CT机时间分辨力的体模测试方法 |
| Measurement of CT temporal resolution with a phantom |
| 投稿时间：2011-05-13 修订日期：2011-07-19 |
| DOI： |
| 中文关键词: 体层摄影术,X线计算机 时间分辨力 体模 伪影 圆弧角度 |
| 英文关键词:Tomography, X-ray computed Temporal resolution Phantom Artifacts Angle of circular arc |
| 基金项目:广州市科技支撑计划项目(2009Z1-E341)。 |
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| 中文摘要: |
| 目的 设计用于测量CT机时间分辨力的方法和相应体模。方法 根据环形伪影产生原理,使含有高密度衰减物的自制时间分辨力均匀体模与CT机架以同样的速度旋转,产生环形伪影,根据环形伪影的角度测量CT机的时间分辨力。结果 当CT机架以0.5 s/240°的扫描速度采集数据时,用自制体模测得CT机的时间分辨力为(0.5002±0.0014)s。结论 实验设计的方法和自制体模可用于测量CT机的时间分辨力。 |
| 英文摘要: |
| Objective To design a method and the corresponding phantom for testing CT temporal resolution. Methods Based on the principle of ring artifact creation, an uniform self-prepared experimental temporal resolution phantom containing high attenuating materials was rotated at the same speed as the gantry to produce partial ring artifacts, then the temporal resolution was calculated according to the angle of partial ring artifacts. Results When the velocity of the X-ray tube was 0.5 s/240°, the temporal resolution of CT was (0.5002±0.0014)s. Conclusion It is feasible to measure the temporal resolution of CT using the practical method and self-prepared experimental phantom. |
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