MCQ Radiology Answer 23

The Correct Answer is C

Magnetic Resonance Imaging (MRI) is the technique of imaging body tissue properties by using nuclear magnetic resonance.

MRI images provide information about hydrogen nuclei density ("proton density"), and about the interactions of hydrogen containing molecules with their surroundings. In the body water is the most important of these molecules. A few other nuclei may be used for specialised imaging purposes (e.g. 13C, 31P).

MRI is particularly suited to imaging differences between soft tissues, such as in the head, neck and spinal regions of the body.

The technique requires the exposure of the body to steady and time-varying magnetic, and radio-frequency magnetic fields, and to the deposition of electromagnetic power in tissues.

Conventional MRI can produce an image of the bone, but this image is typically only of the specific bone tissue surface because the number of free (not in chemically bound form) water molecules within the specific bone tissue, and consequently the number of free protons, is very small

Category: Radiology MCQs