DR不同类型平板探测器性能的比较研究

目的：研究非晶态硒和非晶态硅平板探测器的性能,以便合理的购买和使用DR。方法：比较量子检测效率DQE和调制传递函数MTF。结果：在空间分辨率较低时,非晶硅平板探测器的DQE最高;相比于非晶硅平板探测器,非晶硒平板探测器具有最优的MTF值,但空间分辨率增加时,非晶硅平板探测器的MTF迅速下降,而非晶硒平板探测器仍能保持较好的MTF值。结论：目前还没有一款DQE和MTF都做得很高的平板探测器,在摄片中应根据不同的检查部位来选择不同类型平板探测器的DR。

Comparison of performance among different types of flat panel detectors for DR

Objective： To study the amorphous selenium and amorphous silicon plate detector performance to provide reasonable basis for buying and using the DR .Methods： We compared DQE with MTF. Results： When the spatial resolution was low, the DQE of the amorphous silicon plate detector was the highest and it had optimal MTF value as compared with amorphous silicon plate detector. Upon increase in the spatial resolution, the MTF value of amorphous silicon platedetector fell rapidly. However, the amorphous selenium flat probe could maintain the good MTF value. Conclusion： Nowadays, there is no flat detector with high values of MTF and DQE. Therefore, we should choose different types of plate detector according to different sites of examination.