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Delayed CT findings in acute renal infection
L Dalla-Palma1, F Pozzi-Mucelli, R S Pozzi-Mucelli
1Department of Radiology, University of Trieste, Italy.
Clinical Radiology
|June 1, 1995
Summary
Delayed computed tomography (CT) scans reveal distinct patterns in acute renal infections. These findings improve diagnostic confidence and provide a more precise evaluation of infection extent.
Area of Science:
- Radiology
- Medical Imaging
- Nephrology
Background:
- Acute renal infections, such as pyelonephritis, can present with complex imaging findings.
- Early computed tomography (CT) may show areas of reduced density due to ischemia or edema.
- Accurate assessment of infection extent is crucial for effective treatment.
Purpose of the Study:
- To report and analyze computed tomography (CT) findings in patients with acute renal infection.
- To evaluate the utility of delayed CT scans in characterizing renal infections.
- To correlate early and delayed CT findings with potential underlying pathophysiological mechanisms.
Main Methods:
- Retrospective analysis of computed tomography (CT) scans from twelve patients with acute renal infection.
- Scans were performed immediately and 3 hours after intravenous contrast administration.
- Delayed scans at 6 hours were obtained in three patients.
Main Results:
- Delayed scans demonstrated three key features: delayed nephrogram with high-density areas, focal contrast staining or rim enhancement around abscesses, and distant high-density areas.
- These delayed high-density areas corresponded to early low-density areas.
- The observed patterns suggest replacement of ischemic or obstructed areas.
Conclusions:
- Delayed computed tomography (CT) imaging offers valuable insights into acute renal infections.
- It enhances diagnostic confidence by revealing characteristic patterns not evident on early scans.
- Delayed CT provides a more exact evaluation of the infection's extent, aiding clinical management.