MR enteroclysis

MR enteroclysis is an invasive technique for MRI evaluation of the small bowel mostly used in Crohn disease.

Technique

A general technique includes:

  • placement of a nasoduodenal tube under fluoroscopic guidance
  • small bowel distension with 1-3 L of methylcellulose (0.5%) and water solution or isosmotic water solution through an electric infusion pump (located outside the scanner room): infusion rate:  80-200 mL/min 1,8
MR protocol
  • MR fluoroscopy using a thick-slab 50-mm coronal HASTE sequence with fat saturation, starting at the beginning of the infusion and repeated every 8 seconds during normal breathing
  • subsequently, every 5 minutes, depending on the degree of distention observed from the HASTE images, coronal and axial true fast imaging with steady-state precession (FISP) sequences with fat saturation are performed with a slice thickness of 5 mm to study morphologic changes
  • with maximal distention, multislice HASTE images with fat saturation and unenhanced and enhanced (0.1 mmol/kg gadolinium) T1 coronal and axial fast low-angle shot (FLASH) 2D images with fat saturation are obtained 60 seconds after contrast injection
Advantages
  • no ionizing radiation
  • diagnostic images acquired in the coronal plane at MR imaging represent an advantage over the CT enteroclysis technique (axial)
Disadvantages
  • inability to compress bowel in real time (cf. older fluoroscopic technique)

See also

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Article information

rID: 30093
Synonyms or Alternate Spellings:
  • MRI enteroclysis
  • Magnetic resonance enteroclysis
  • MR enteroclysis

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