The conventional methods for medical imaging have several disadvantages such as restriction on the energy and detection efficiency1). Coded aperture imaging2) can be used for medical imagings without restriction on the energy, which makes it possible to use multiple tracers in diagnosis. The detection efficiency of Coded aperture imaging is ten times better than that of the pinhole colimator.
First, simulations of the coded aperture imaging have been done to confirm M-array's effectiveness. Second, two experiments have been done with low-energy gamma-ray (122 keV(57Co)) and with high-energy gamma-ray (662 keV(137Cs)). In both cases reconstructed image was successfully acquired. The measured spatial resolution in the experiment using 57Co is 4.3 mm (FWHM).
