Comparison of Magnetic Resonance Imaging with Computed Tomography in the Detection and Characterization of Intracranial Tumors

摘要: The rapid development of clinical magnetic resonance imaging (MRI) and its recognition as a valuable tool in neurodiagnosis have generated excitement enthusiasm rivalling that associated with the introduction computed tomography (CT) decade ago. Magnetic has several advantages over X-ray CT. multiple physical properties tissue determine image contrast MRI permit superior detection characterization altered tissue. relatively small alterations focal water concentration caused by many brain disorders produce proportionally larger alteration intensity signal than CT signal. Differential sensitivity to resonating protons found other molecular substrates, such fat or hematoma, may yield additional information histologic significance. ability visualize blood vessels provides anatomic landmarks normal patients assumes diagnostic importance presence vascular lesions. Finally, no known biologic hazards, iodinated intravenous agents are not required, bone artifacts eliminated, images be obtained directly any plane.