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Renal perfusion abnormality. Coded harmonic angio US with contrast agent.
1Department of Radiology, Soonchunhyang University Hospital, Seoul, Korea. junghkim@hosp.sch.ac.kr
Acta Radiologica (Stockholm, Sweden : 1987)
|April 16, 2003
Summary
Coded harmonic angiography (CHA) ultrasound effectively visualizes renal tumors and perfusion defects using microbubble contrast agents. This technique aids in evaluating tumor vascularity and identifying abnormalities compared to dynamic CT.
Area of Science:
- Medical Imaging
- Radiology
- Ultrasound Technology
Background:
- Coded harmonic angiography (CHA) ultrasound is a novel technique for visualizing contrast agent effects.
- Assessing renal perfusion abnormalities and tumor vascularity is crucial in diagnosis.
Purpose of the Study:
- To evaluate the efficacy of CHA ultrasound in characterizing renal perfusion abnormalities.
- To compare CHA ultrasound enhancement patterns with dynamic computed tomography (CT).
Main Methods:
- 12 renal cell carcinomas, 5 transitional cell carcinomas, 5 acute pyelonephritis, and 2 renal trauma cases were studied.
- CHA ultrasound with microbubble contrast agent was used, with imaging before and after contrast administration.
- Contrast enhancement patterns were compared with dynamic CT findings.
Main Results:
- Renal cell carcinomas showed heterogeneous (75%) or homogeneous (25%) enhancement.
- Transitional cell carcinomas exhibited peripheral enhancement.
- Acute pyelonephritis and renal trauma cases revealed focal perfusion defects not seen pre-contrast.
Conclusions:
- CHA ultrasound with microbubble contrast is effective for evaluating tumor vascularity.
- CHA ultrasound is a valuable tool for assessing renal perfusion abnormalities.