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The subject drinks 1.5 litres of oral contrast (3% mannitol) [3] over 30 to 45 minutes before the scan. After that venous access is obtained and Buscopan (hyoscine butylbromide) is given to reduce the gastrointestinal tract movement, thus reducing motion artifact on MRI scan. [4]
Mannitol is a type of sugar alcohol used as a sweetener and medication. [ 5 ] [ 6 ] It is used as a low calorie sweetener as it is poorly absorbed by the intestines . [ 5 ] As a medication, it is used to decrease pressure in the eyes, as in glaucoma , and to lower increased intracranial pressure .
MRI contrast agents may be administered by injection into the blood stream or orally, depending on the subject of interest. Oral administration is well suited to gastrointestinal tract scans, while intravascular administration proves more useful for most other scans. MRI contrast agents can be classified [2] by their: Chemical composition
Barium X-ray examinations are useful tools for the study of appearance and function of the parts of the gastrointestinal tract. They are used to diagnose and monitor esophageal reflux, dysphagia, hiatus hernia, strictures, diverticula, pyloric stenosis, gastritis, enteritis, volvulus, varices, ulcers, tumors, and gastrointestinal dysmotility, as well as to detect foreign bodies.
Mitochondrial neurogastrointestinal encephalopathy syndrome (MNGIE) is a rare autosomal recessive mitochondrial disease. [2] It has been previously referred to as polyneuropathy, ophthalmoplegia, leukoencephalopathy, and intestinal pseudoobstruction (POLIP syndrome). [3]
A minimal acute obstructive series (for the purpose of ruling out small bowel obstruction) includes two views: typically, a supine view and an upright view (which are sufficient to detect air-fluid levels), although a lateral decubitus could be substituted for the upright.
The small bowel is divided longitudinally in the midline, preserving one leaf of mesentery with its blood supply to each half. This results in two vascularized segments of small bowel which can then be rejoined end-to-end to restore continuity of the small bowel. There are also another ways of performing this procedure.
Superior mesenteric artery compressing the duodenum, featuring the superior mesenteric artery syndrome. Superior mesenteric artery (SMA) syndrome is a gastro-vascular disorder in which the third and final portion of the duodenum is compressed between the abdominal aorta (AA) and the overlying superior mesenteric artery.