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Case report: inverted contrast medium--urine level in the bladder on computed tomography.
1Department of Diagnostic Radiology, Christie Hospital and Holt Radium Institute, Manchester.
Clinical Radiology
|September 1, 1992
Summary
Computed tomography (CT) typically shows contrast-enhanced urine layering posteriorly in the bladder. A case study revealed an inverted fluid-fluid level due to bladder sediment.
Area of Science:
- Radiology
- Urology
- Medical Imaging
Background:
- Fluid-fluid levels in anatomical structures arise from specific gravity differences.
- Computed tomography (CT) imaging demonstrates characteristic appearances based on these density variations.
Observation:
- Normally, contrast-enhanced urine (high specific gravity) layers dependently in the bladder.
- Non-opacified urine (lower specific gravity) is typically visualized superiorly.
Findings:
- A patient presented with an inverted contrast medium-urine level on CT.
- This inversion was attributed to the presence of sediment in the dependent portion of the bladder.
Implications:
- Sediment can alter the expected layering of fluids within the bladder.
- Radiologists should consider sediment as a cause for atypical fluid-fluid levels in CT imaging.