ABSTRACT
The development of medical imaging has progressed remarkably over the past few decades. Medical imaging such as radiography, fluoroscopy, computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET), single photon emission computed tomography (SPECT), and ultrasonography (US) can be used for detection, localization, visualization, and characterization of tumors. Many new imaging techniques including angiography, perfusion, and dynamic contrast enhancement imaging have been developed to study tumors. Because the information provided by medical images is enormous and sometimes not very intuitive, image processing and analysis is performed to extract useful information from the images. Image processing and analysis is usually conducted after the acquisition of the images, thus it is also called ‘‘postprocessing.’’
