MRI of the Small Bowel
For decades, barium fluoroscopy studies have been the standard of reference to investigate small-bowel diseases. As the small bowel was not accessible to endoscopic techniques, these studies represented the only noninvasive diagnostic approach to the intestine. Both small-bowel follow- through and small-bowel enteroclysis yielded fairly good results, with sensitivities and specificities, respectively, of 98.3% and 99.3% for Crohn’s disease  and between 61% and 95% for neoplastic disease , notably in assessing the intestinal mucosa due to high spatial resolution. Limitations of this technique are the almost exclusively intraluminal information, and the considerably high radiation exposure of up to 10–18 mSv. Technical advances in cross-sectional imaging by both computed tomography (CT) and magnetic resonance imaging (MRI) in the past 10 years brought about tremendous improvement of image quality in the abdomen, encouraging small-bowel imaging.
KeywordsBowel Loop Internal Fistula Compute Tomography Enterography Submucosal Edema Compute Tomography Enteroclysis
- 12.Ordá I, Rimola J, Rodríguez S et al (2013) Accuracy of magnetic resonance enterography in assessing response to therapy and mucosal healing in patients with Crohn’s disease. Gastroenterology doi: 10.1053/j.gastro.2013.10.055 [Epub ahead of print]Google Scholar
- 15.Hordonneau C, Buisson A, Scanzi J (2013) Diffusion-weighted magnetic resonance imaging in ileocolonic Crohn’s disease: validation of quantitative index of activity. Am J Gastroenterol doi: 10.1038/ajg.2013.385. [Epub ahead of print]Google Scholar
- 24.Schlemmer M, Sourbron SP, Schinwald N et al (2009) Perfusion patterns of metastatic gastrointestinal stromal tumor lesions under specific molecular therapy. Eur J Radiol 27:278–284.Google Scholar