CT and MR enterography in evaluating small bowel diseases: when to use which modality?

Area of Science:

• Radiology
• Gastroenterology
• Medical Imaging

Background:

• Magnetic resonance (MR) and computed tomography (CT) are increasingly utilized for small bowel imaging, surpassing traditional barium fluoroscopic examinations.
• Technological advancements in spatial and temporal resolution, along with improved bowel distending agents, enhance the diagnostic capabilities of MR and CT.
• Growing concerns regarding radiation exposure are driving interest in non-ionizing imaging techniques for conditions requiring repeated assessments.

Purpose of the Study:

• To highlight the advantages of MR and CT techniques in evaluating small bowel disorders.
• To emphasize the benefits of MR imaging, particularly its non-ionizing nature and advanced functional imaging capabilities.
• To discuss the role of MR in characterizing intra- and extraluminal abnormalities for accurate diagnosis.

Main Methods:

• Review of MR and CT techniques optimized for small bowel imaging.
• Comparison of MR and CT with traditional barium fluoroscopic examinations.
• Discussion of MR's properties, including lack of ionizing radiation, improved tissue contrast, and real-time functional imaging.

Main Results:

• MR and CT demonstrate improved spatial and temporal resolution over barium fluoroscopy.
• MR offers advantages such as no ionizing radiation, superior tissue contrast, and real-time functional imaging.
• MR modalities enable visualization of the entire bowel, detecting both intra- and extraluminal abnormalities.

Conclusions:

• MR and CT techniques are valuable tools for diagnosing and characterizing small bowel diseases.
• MR imaging is particularly well-suited for small bowel evaluation, especially in patients requiring frequent monitoring, due to its safety profile and comprehensive imaging features.
• The combination of MR findings, contrast enhancement, and functional information facilitates accurate diagnosis of small bowel disorders.