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  Indian J Med Microbiol
 

Figure 4: 18Fluorin-fluorodeoxyglucose positron emission tomography images of a patient with hepatocellular carcinoma. (a) Original image, (b) image having highest value of entropy (c) image having highest value of edge content (slightly more than the original image), (d) image having lowest value of absolute mean brightness error, (e) lowest value of saturation evaluation metric, and (f) image with best contrast based on high value of entropy and edge content and low value of absolute mean brightness error and saturation evaluation metric. Visually it is clear that the selected transformation function in this study has produced better contrast between the tumor and normal liver cell than the original image

Figure 4: 18Fluorin-fluorodeoxyglucose positron emission tomography images of a patient with hepatocellular carcinoma. (a) Original image, (b) image having highest value of entropy (c) image having highest value of edge content (slightly more than the original image), (d) image having lowest value of absolute mean brightness error, (e) lowest value of saturation evaluation metric, and (f) image with best contrast based on high value of entropy and edge content and low value of absolute mean brightness error and saturation evaluation metric. Visually it is clear that the selected transformation function in this study has produced better contrast between the tumor and normal liver cell than the original image