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Perianal infections: reader agreement and diagnostic performance of fat-suppressed contrast-enhanced MRI

Ayşe Erden1, Ethem Geçim, Suat Fitoz

  • 1Department of Radiology, Ankara University, Medical School, Ankara, Turkey. ayse.erden@medicine.ankara.edu.tr

Australasian Radiology
|December 4, 2003
PubMed

Insights

Contrast-enhanced fat-suppression MRI techniques show comparable diagnostic performance for perianal infections. No single magnetic resonance imaging (MRI) sequence significantly outperformed others in detecting these infections.

Area of Science:

  • Radiology
  • Medical Imaging
  • Gastroenterology

Background:

  • Perianal infections require accurate diagnostic imaging.
  • Magnetic resonance imaging (MRI) is utilized for evaluating anorectal conditions.
  • Optimizing MRI sequences for infection detection is crucial for patient management.

Purpose of the Study:

  • To assess the diagnostic performance of contrast-enhanced fat-suppression MRI for perianal infections.
  • To compare this technique against other standard MRI sequences.
  • To evaluate the detectability of perianal infections using various MRI protocols.

Main Methods:

  • Thirty patients with suspected anorectal infections underwent MRI.
  • Sequences included fast spin-echo (FSE) T2-weighted, short-inversion-time inversion recovery (STIR), and fat-suppressed/non-fat-suppressed T1-weighted spoiled gradient-echo (SGE) dynamic contrast-enhanced MRI.
  • MRI findings were correlated with surgical outcomes (gold standard); receiver-operating-characteristic curves and kappa values were used for analysis.

Main Results:

  • No statistically significant differences in diagnostic performance were observed among STIR, FSE T2-weighted, and contrast-enhanced SGE T1-weighted (fat-suppressed and non-fat-suppressed) techniques for perianal infection detection.
  • Fat-suppressed, contrast-enhanced SGE T1-weighted MRI demonstrated adequate diagnostic performance.
  • High interobserver agreement was noted for lesion detection across all evaluated MRI techniques.

Conclusions:

  • Contrast-enhanced fat-suppressed MRI is adequate for detecting perianal infections.
  • Its diagnostic significance is comparable to other MRI sequences evaluated in this study.
  • The choice of MRI sequence may not critically impact the detection of perianal infections.

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