A computer program product for determining a modulation transfer function of an imaging system, the computer program product comprising at least one non-transitory computer-readable storage medium having computer-readable program instructions stored therein, the computer-readable program instructions comprising:
- program instructions configured to access an image of a phantom having a substantially circular shaped feature captured by the imaging system;
- program instructions configured to detect the circular shaped feature within the image;
- program instructions configured to define at least one line extending from a point within the detected circular shaped feature to a point outside of the circular shaped feature;
- program instructions configured to determine an edge spread function based at least in part on the defined at least one line;
- and
- program instructions configured to determine the modulation transfer function of the imaging system based at least in part on the determined edge spread function.