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Patient movement during SPECT and PET data acquisition makes serious distortions in reconstructed images. In most conventional methods a correction of this movement is conducted in the sinogram space. However, the direction of movement occurs at an angle that is parallel to collimator holes, making it is difficult to detect the movement of an object. This paper proposes a new correction method of...
An important issue in diagnostic imaging is to acquire high quality images with a small dose. However x-ray images acquired with a small dose are affected by the quantum noise. In this paper, we propose a new method to yield high quality images acquired with a small dose by reducing the noise and enhancing the contrast of images adequately. The proposed method consisted of the following steps: (1)...
We have developed digital phantoms to be used for a basic education on an image quality and a quantification of SPECT data. Differing from the digital phantoms developed by Castiglioni and et al, several SPECT projection data sets were generated by Monte Carlo simulations (EGS4 code) with different acquisition parameters. A physical, brain and cardiac phantoms were generated. An external shape of...
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