Coded Aperture Imaging of Gamma-Rays Using Multiple Pinhole Arrays and Multiwire Proportional Chamber Detector

Coded shadows of gamma-ray distributions have been made using both random pinhole and non-redundant pinhole coded apertures with a multiwire proportional chamber as detector. Image reconstruction is done optically with incoherent light. Lateral and depth resolution results are presented and calculations of background and signal to noise ratios for the nonredundant aperture are made and compared with the single pinhole collimator.