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High‐grade stenosis of the internal carotid artery assessed by color and power Doppler imaging
Author(s) -
Schmidt Peter,
Sliwka Ulrich,
Simon StefanGeorg,
Noth Johannes
Publication year - 1998
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/(sici)1097-0096(199802)26:2<85::aid-jcu6>3.0.co;2-e
Subject(s) - medicine , stenosis , power doppler , radiology , carotid arteries , doppler effect , color doppler , cardiology , internal carotid artery , ultrasonography , physics , astronomy
Purpose Visualization of carotid artery stenosis is important to improve our understanding of the etiology of ischemic stroke. Two sonographic methods are available for visualizing carotid stenosis: power Doppler imaging (PDI) and color Doppler imaging (CDI). The purpose of this study was to compare the advantages and limitations of these methods in the evaluation of internal carotid artery (ICA) stenosis. Methods Thirty‐two patients with at least 70% extracranial ICA stenosis were included in this prospective study. All subjects were examined with CDI and PDI. Four criteria were used to evaluate diagnostic accuracy and overall efficacy: identifying the target vessel, determining the causal pathology, evaluating blood flow, and the examiner's confidence in the diagnosis. Results All patients had high‐grade stenosis (17 patients had 70% stenosis, 11 had 80%, 2 had 90%, and 2 had pseudo‐occlusions of the ICA). PDI was significantly ( p < 0.05) superior to CDI in identifying the target vessel and highly significantly ( p < 0.01) superior to CDI in evaluating blood flow. There were no significant differences between CDI and PDI in determining the causal pathology or in the examiner's confidence in the diagnosis. Conclusions This study demonstrates that PDI is a good additional method to CDI and should be used with it to evaluate ICA stenosis. © 1998 John Wiley & Sons, Inc. J Clin Ultrasound 26 : 85–89, 1998.