Abstract：Objective Implementing the automatic acquisition of central point position of point spread region in MTF measurement to avoid the influence of randomness and noise of manual selection on the maximum CT value. Methods According to the limitation that the shape of point spread region should be roundness, to segment the point spread region with image processing methods and then identify the central point position with mathematical transformation methods in order to draw MTF curve. Results The test process of CT system evaluation has been simplified with the automatic acquisition method of central point position, with which relevant staff can get the correct and stable central point position and draw the correct and unified MTF curve. Conclusion The proposed self-adaption measuring method for MTF is accurate and effective, which is suitable for CT system evaluation.
王甜甜，李国侠，庞浩，包百鸣. CT系统MTF自适应测量方法[J]. 中国医疗设备, 2015, 30(1): 34-36.
WANG Tian-tian, LI Guo-xia, PANG Hao, BAO Bai-ming. A Self-Adaptive Measuring Method for MTF in CT System. China Medical Devices, 2015, 30(1): 34-36.
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