Diagnosis of primary liver cancer using magnetic resonance imaging
Magnetic resonance imaging (MRI) appeared for use in diagnostic radiology in the early 1980s. This method of diagnostic imaging is characterized by excellent contrast resolution and free direction as well as no exposure to radiation. The intensities of organs and tumors reflect multiple factors, such as proton density, longitudinal relaxation time (Tl), and transverse relaxation time (T2). The weights of these factors are changed by pulse sequences and their timing parameters, whereas X-CT and radionuclide imaging are determined by only one factor. In addition, there are many pulse sequences that can be used in MRI, such as a set of radiofrequency pulses, gradient pulses and time intervals between pulses. However, the standard technique used is spin echo imaging because of the high signal to noise ratio.
KeywordsMagnetic Resonance Imaging Tumor Thrombus Focal Nodular Hyperplasia Primary Liver Cancer Cavernous Hemangioma
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