The ASTM Method of MTF Measurement in Industrial Computed Tomography

A method to measure the modulation transfer function(MTF) suggested by ASTM standard was introduced and applied in the practical testing of an industrial X-ray CT. By using disc phantoms in the tomography scan, the MTF was obtained under certain acquisition conditions. The advantage of the method and some modified computing technical details were introduced and illustrated, the results were demonstrated and discussed. This method can be used in the performance test of the industrial CT.