Imaging of the small intestine

Area of Science:

• Gastroenterology
• Diagnostic Imaging
• Radiology

Background:

• Endoscopic examination of the small intestine remains challenging and impractical for routine diagnosis.
• A range of radiological imaging modalities are available for investigating suspected small intestinal disorders.
• The choice of imaging technique often depends on the patient's clinical presentation and suspected pathology.

Purpose of the Study:

• To review the current radiological techniques for investigating small intestinal disorders.
• To highlight the utility and limitations of various imaging modalities in diagnosing small bowel conditions.
• To provide guidance on selecting appropriate imaging methods based on clinical scenarios.

Main Methods:

• Review of established radiological techniques for small bowel investigation.
• Discussion of the applications of plain radiographs, barium studies (including enteroclysis), computed tomography (CT), angiography, and radionuclide studies.
• Evaluation of the role of ultrasound in small intestinal imaging.

Main Results:

• Plain radiographs are the first-line imaging for acute presentations.
• Barium studies, particularly enteroclysis, are accurate for less acute presentations.
• CT is valuable for intestinal obstruction; angiography and radionuclide studies are key for suspected bleeding.
• Ultrasound demonstrates limited utility in evaluating small intestinal disorders.

Conclusions:

• Radiological imaging is essential for diagnosing small intestinal disorders when endoscopy is not feasible.
• Enteroclysis represents an accurate barium technique for small bowel evaluation.
• Specific radiological methods are highly effective for diagnosing conditions like obstruction, bleeding, and general small bowel pathology.