الفهرس 
List of abbreviationsOnly 14 pages are availabe for public view
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Abstract
Diagnosis and characterization of disease by anatomical imaging (CT and MRI) are based on morphologic criteria such as size, texture and tissue attenuation and devoid of functional data. On the other hand, nuclear medicine imaging modalities (gamma camera and PET scanners) are functional imaging machines and devoid of anatomical details. So,anatomical and radioactive funational imaging are complementary to each other and both are required for acurate image interpretation and so diagnosis of diseases.…………………………………………………...
whereas the advent of dedicated dual-modality imaging systems designed specifically for clinical use is relatively recent, the potential advantages of combining anatomical and functional imaging has been recognized for several decades by pioneering radiological scientists and physicians. Combining anatomical and functional or metabolic information into a fused image has been pursued for a long time. Early attempts were made by software fusion of PET/SPECT and x-ray CT/MR images. .
Nowadays, hybrid imaging machines are available commercially for clinical use and should be widely used for better diagnosis and evaluation
of diseases in different medical fields either oncological or non oncological.