Ability of a phase shift US contrast agent to improve imaging of the main renal arteries
| Autor: | T M Watts, André J. Duerinckx, Edward Grant, B S Levine, M L Melany |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Adult
Male medicine.medical_specialty medicine.medical_treatment media_common.quotation_subject Contrast Media Renal Artery Obstruction Renal artery stenosis Placebo Sensitivity and Specificity Magnetic resonance angiography Renal Artery medicine.artery Humans Medicine Contrast (vision) Radiology Nuclear Medicine and imaging Renal artery Saline Aged media_common Fluorocarbons Kidney medicine.diagnostic_test business.industry Ultrasonography Doppler Middle Aged medicine.disease Stenosis medicine.anatomical_structure Radiology business Magnetic Resonance Angiography |
| Zdroj: | Radiology. 205:147-152 |
| ISSN: | 1527-1315 0033-8419 |
| DOI: | 10.1148/radiology.205.1.9314976 |
| Popis: | To evaluate the ability of a phase shift contrast agent to improve Doppler sonographic imaging of the main renal arteries in cases of suspected renal artery stenosis.In 25 patients in whom renal artery stenosis was suspected, baseline Doppler sonography was performed followed by two studies performed after blinded administration of contrast material or placebo (saline). Each kidney (n = 45) was evaluated for (a) visualization of the main renal artery on a scale of 0-4, (b) presence of accessory renal arteries, and (c) direct Doppler sonographic findings suggestive of renal artery stenosis. Correlative magnetic resonance angiography was performed in 24 patients, and angiograms were obtained in eight kidneys with stenosis at one or both imaging studies.Contrast enhancement was observed in 23 patients. Enhancement was 8-20 minutes. Renal artery visualization scores improved from a mean of 2.56 and 2.71 on baseline and noncontrast scans, respectively, to 3.69 after administration of contrast material. Contrast-enhanced images depicted seven kidneys with accessory renal arteries not seen at other studies. Two of eight cases of stenosis were seen only with contrast-enhanced sonography.Use of the phase shift contrast agent appears to enable a reduction in the number of equivocal findings of renal artery stenosis. |
| Databáze: | OpenAIRE |
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