MR enterography
Updates to Article Attributes
Body
was changed:
MR enterography is a new non-invasive technique for diagnosis of small bowel disorders.
Indications
The most common indication is to evaluate patients with Crohn's disease (CD).
Technique
Actual procedure will vary depending on institutional protocol/guidelines but below is a typical description 1, 2:
- patients should abstain from all food and drinks for 4-6 h prior to the study
- patients drink about 1-1.5 L of a 2.5% mannitol solution at regular intervals over a period of approximately 40 min prior to the study
- this solution acts as a hyperosmolar agent which draw fluid into the bowel & (biphasic) appears as low signal intensity on T1-weighted images and high signal intensity on T2-weighted images
- scanning is ideally performed on a 1.5-T MRI scanner, using a phased array surface coil, either in the supine or prone position
MR protocol
- comprehensive MR examination of the small bowel usually requires axial and coronal both T1 and T2 weighted images
- high-resolution ultra-fast sequences such as true fast imaging with steady-state precession (true FISP) and HASTE sequences with and without fat suppression are usually used
- fat-suppressed three-dimensional (3D) T1-weighted breath-hold gradient-echo images of the abdomen and pelvis before and after intravenous gadolinium-based contrast material administration
Advantages
- no ionizing radiation
- high contrast resolution and multiplanar capability
- it can detect mural small bowel disorders with possible extramural complications and also allows the detection of the extra-intestinal solid organ pathologies
See also
-<!--[endif]-->comprehensive MR examination of the small bowel usually requires axial and coronal both <a title="T1 weighted image" href="/articles/t1-weighted-image">T1</a> and <a title="T2 weighted image" href="/articles/t2-weighted-image">T2 weighted images</a>- +<!--[endif]-->comprehensive MR examination of the small bowel usually requires axial and coronal both <a href="/articles/t1-weighted-image">T1</a> and <a href="/articles/t2-weighted-image">T2 weighted images</a>
Tags changed:
- small bowel
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