ANATOMY
NEURORADIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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PET
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CT
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fMRI
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MRI
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Detailed explanation-1: -Because MRI uses magnetism instead of X rays, a subject can undergo repeated MRI scans without the risk of exposure to potentially harmful radiation.
Detailed explanation-2: -Magnetic resonance imaging (MRI) is a noninvasive test doctors use to diagnose medical conditions. MRI uses a powerful magnetic field, radiofrequency pulses, and a computer to produce detailed pictures of internal body structures. MRI does not use radiation (x-rays).
Detailed explanation-3: -A PET scan requires a small amount of radioactive material (tracer). This tracer is given through a vein (IV), usually on the inside of your elbow. Or, you breathe in the radioactive material as a gas. The tracer travels through your blood and collects in organs and tissues.
Detailed explanation-4: -An MRI scanner can create clear, detailed pictures of the structure of the brain and can detect any abnormalities or tumours. Sometimes a dye, or tracer, such as gadolinium may be introduced via a vein in the arm, to improve contrast in the image.
Detailed explanation-5: -Magnetic resonance imaging is the structural imaging tool of choice. It is superior to radiographic CT in terms of both sensitivity and specificity for the identification of small lesions and abnormalities of the cerebral cortex.