抄録
The presampling modulation transfer function(MTF)and the final MTF have been used in evaluating the resolution of digital imaging systems. These MTFs are generally measured by the slit method. On the other hand, in the analog system, the square wave response function(SWRF)method is widely used to measure MTF. In this study, we examined the use of the SWRF method with a digital imaging system. Results showed that output modulations of square waves were varied when data were sampled sparsely. However, the presampling MTF and the final MTF could be measured from the maximum and minimum values of output modulation. The measured final MTFs obtained from the slit method and the SWRF method were in good agreement with one another.
