A study and Evaluation of the Spatial Domain Filters for Enhancement the Quality of CT Scan Images
Abstract
Medical image enhancement has become an important factor to increase image clarity and reduce diagnostic medical errors. This paper proposed a MATLAB program to improve the quality of CT scan using three filters (Average, Median, and Gaussian filters). This program was applied to three parts of the body (head, lung and abdomen) to show the difference in improvement between them. Also through the software used, the improved image quality was evaluated using three measures to measure the improved image quality (MAE, MSE and PSNR). The results obtained from this study showed that PSNR values ??for the Gaussian filter were the highest values ??for all images compared to other filters. This shows that the quality of the images improved by this filter is of high quality, where these values ??are 34dB, 35dB and 39 dB for the brain, lung and abdomen, respectively. These results showed that the basic characteristics of the various images were reflected in the filter function. The average filter results are better than the Median filter with 26dB, 25dB and 30dB for brain, lung and abdomen, respectively.
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