| ENCYCLOPEDIA INDEX |
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Injury Disease Nutrition Poison Symptoms Surgery Test |
| 1 2 5 A B C D E F G H I J K L M N O P Q R S T U V W X |
Abdominal MRI |
| Overview Risks Results |
| Alternative Names: |
| Nuclear magnetic resonance - abdomen; NMR - abdomen; Magnetic resonance imaging - abdomen; MRI of the abdomen |
| What the risks are: |
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There is no ionizing radiation involved in MRI, and there have been no documented significant side effects of the magnetic fields and radio waves used on the human body to date. The most common MR intravenous contrast agent, gadolinium, is very safe, and although there have been documented allergic reactions to it, this is extremely rare. If sedation is used, there are associated risks of over-sedation. The technologist monitors the patient's vital signs, including heart rate and respiration as needed. However, because the effects of strong magnetic fields on a fetus are not well documented at this time, pregnant women are usually advised to avoid MRI scans. MRI is usually not recommended for acute trauma situations, because traction and |
| Special considerations: |
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MRI is more accurate than a CT scan or other tests for certain conditions but less accurate for others. The function of the small and large bowel (intestines) is not readily visible. Disadvantages include the high cost, long duration of the scan, and sensitivity to movement. People with claustrophobia or who are confused or anxious may have difficulty lying still for the relatively long scan times. MRI is not portable (it cannot be taken to the patient, the patient must come to the scanner) and is incompatible with metallic implants, life-support devices, traction apparatus, and similar equipment. MRI is superior in most cases in which differentiation of soft tissues is necessary. It can view organs that may be obscured by bone or foreign bodies on conventional X-rays or CT scans. It is capable of showing the tissues from multiple viewpoints and is a noninvasive way to evaluate blood flow. |
Digestive system |
MRI scans |
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