Nuclear magnetic resonance imaging (MRI).

摘要: This article discusses the basic concepts of Magnetic Resonance Imaging (MRI) with intention to introduce subject uninitiated. The MRI technique is a powerful noninvasive probe body's internal anatomy. In MRI, images are produced not by X-rays, but through use non-ionizing radiowaves that stimulate transitions between spin states nuclei in magnetic field when passed body. time required for nucleus return equilibrium gives information about environment nucleus. this way tissue abnormalities can be determined vivo. covers basis phenomena, concept moment sample, NMR exalation and emission equipment necessary observe these properties. primary agents used increase contrast also mentioned. Finally importance prospects Pakistan have been discussed.