| Effect of ultrasound contrast medium in color Doppler and power Doppler visualization of blood flow in canine kidneys. | |
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MedLine Citation:
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PMID: 9191438 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To examine the effect of an ultrasound contrast medium (UCM) in the visualization of parenchymal blood flow by means of color Doppler and power Doppler sonography. MATERIAL AND METHODS: Nonenhanced and UCM-enhanced Doppler images of canine kidneys were obtained in a transversal plane during various states of flow reduction in the anterior branch of the renal artery. The UCM consisted of air-filled shell-stabilized microballoons (half-life approximately 2 min). The images were evaluated blindly by 4 observers who rated the amount of flow signal in the cortex and medulla, and categorized the flow state (normal, reduced or no flow) in the anterior part of the kidney. RESULTS: The UCM increased the area of Doppler signals in the cortex and outer medulla during normal or reduced blood flow. The border between nonperfused and normally perfused parenchyma was more distinct with the UCM. The categorization of the regional flow state was more correct with the UCM. Improvement with the UCM was greatest when the nonenhanced Doppler images had suboptimal intensity, but positive effects with the UCM were also seen in recordings with adequate precontrast intensity. Color blooming artifacts sometimes occurred on the side of the kidney facing away from the transducer. CONCLUSION: The UCM improved the color Doppler and power Doppler visualization of the parenchymal blood flow in the canine kidney, and allowed a more correct categorization to be made of the regional blood flow state. |
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Authors:
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A Abildgaard; N E Kløw; J A Jakobsen; T S Egge; M Eriksen |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Acta radiologica (Stockholm, Sweden : 1987) Volume: 38 ISSN: 0284-1851 ISO Abbreviation: Acta Radiol Publication Date: 1997 May |
Date Detail:
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Created Date: 1997-07-14 Completed Date: 1997-07-14 Revised Date: 2003-11-14 |
Medline Journal Info:
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Nlm Unique ID: 8706123 Medline TA: Acta Radiol Country: DENMARK |
Other Details:
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Languages: eng Pagination: 445-53 Citation Subset: IM |
Affiliation:
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Department of Radiology, National Hospital, Oslo, Norway. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Air Animals Artifacts Contrast Media* Dogs Half-Life Image Enhancement Kidney / blood supply*, ultrasonography Kidney Cortex / blood supply Kidney Medulla / blood supply Microspheres Observer Variation Regional Blood Flow Renal Artery Renal Artery Obstruction / physiopathology, ultrasonography Renal Circulation* Single-Blind Method Transducers Ultrasonography, Doppler / methods* Ultrasonography, Doppler, Color* |
| Chemical | |
Reg. No./Substance:
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0/Contrast Media |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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