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Bladder wall morphology: in vitro MR imaging-histopathologic correlation

Y Narumi1, T Kadota, E Inoue

  • 1Department of Diagnostic Radiology, Center for Adult Diseases, Osaka, Japan.

Radiology
|April 1, 1993
PubMed
Summary
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Magnetic resonance imaging (MRI) reveals distinct signal intensities in normal and inflamed bladder walls. These MRI findings correlate with bladder wall morphology and muscle layer composition.

Area of Science:

  • Radiology
  • Urology
  • Histopathology

Background:

  • Understanding bladder wall morphology is crucial for diagnosing inflammatory conditions.
  • Magnetic resonance imaging (MRI) offers non-invasive visualization of soft tissues.

Purpose of the Study:

  • To correlate magnetic resonance imaging (MRI) findings with histopathologic examination of bladder wall morphology.
  • To differentiate between normal and inflamed bladder wall characteristics using MRI.

Main Methods:

  • Correlation of in vitro magnetic resonance imaging (MRI) findings with histopathologic examination.
  • Analysis of T1-weighted and T2-weighted images for signal intensity patterns.
  • Morphometric correlation of MRI-identified bands with muscle bundle percentages.

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Main Results:

  • Normal bladder walls showed specific intermediate and low/intermediate signal intensities on T1/T2-weighted images, respectively.
  • Inflamed bladder walls exhibited additional intermediate/high signal intensities on T1/T2-weighted images.
  • T2-weighted image bands correlated morphometrically with bladder wall muscle layers.

Conclusions:

  • The thickness of T2-weighted image bands in normal bladders correlates with muscle layers.
  • Distinct signal intensities in the muscle layer reflect compact inner and looser outer smooth muscle arrangements.