This research is concerned with Multiple Pinhole Coded Aperture (MPCA) radioisotope tomographic imaging. In the process of radioisotope tomographic imaging, RCT, Time Modulation, MPCA and other methods are used. In comparison with the other available methods, MPCA imaging is a relatively simple procedure. In contrast with the other methods, there is no need to rotate either the patient or the detector. Using the usual Gamma-camera, there is no need for any alterations; using an optical reconstruction or a mini-computer system, a tomographic image can be produced. However, using the MPCA method, reconstruction of a tomographic image is very problematic. Due to the many problems involved in reconstruction of the tomographic image using the MPCA method, at the present, only a 7-pinhole form of the MPCA is being used clinically, limited to small organs (especially the heart). This research is an experimental effort to overcome the problem of reconstruction of a tomographic image using MPCA. By using a reconstruction algorithm, it has been made possible to use the MPCA method in order to depict large organs, (not only the heart, but organs such as the brain, liver and lung. ). A corrected reconstructed image and a digital filter software were obtained.
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