Comparison of color-flow Doppler scanning, power Doppler scanning, and frequency shift for assessment of carotid artery stenosis

Müller, Martin; Ciccotti, Pierra; Reiche, W.; Hagen, Thomas

doi:10.1067/mva.2001.118581

Cited by 46 publications

(30 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Overestimation of the vessel lumen and underestimation of the length of a stenosis as a result of pulsation and reverberation artefacts known from CCDS also occur in PD in preocclusive stenoses. Nevertheless, comparative studies indicate that sonographic diagnostics of high-degree stenoses are improved by using PD [20,22].…”

Section: Discussionmentioning

confidence: 96%

Diagnostics and characterisation of preocclusive stenoses and occlusions of the internal carotid artery with B-flow

et al. 2006

View full text Add to dashboard Cite

The purpose was to evaluate whether B-flow can improve the ultrasonographic diagnosis of preocclusive stenosis and occlusion of the internal carotid artery (ICA) compared with colour-coded Doppler and power Doppler. Ninety patients with occlusions or preocclusive stenoses of the ICA suspected by Doppler sonography were examined with B-flow in comparison with colour-coded Doppler sonography (CCDS), power Doppler (PD) and intra-arterial digital subtraction angiography (DSA). Intrastenotic flow detection and lengths of stenoses were the main criteria. Ulcerated plaques found by surgery in 42/90 patients were compared by ultrasonography (US). Diagnosis of ICA occlusion with CCDS, PD and B-flow was correct in all 42 cases. A preocclusive ICA stenosis in DSA was detected correctly in all 48/48 cases (100%) for B-flow, in 44/48 (92%) for PD and in 39/48 (81%) for CCDS. Surgical findings showed in 17/42 cases ulcerated plaques; 15/17 (89%) of these cases were detected with B-flow, 12/17 (71%) with PD, 10/17 (59%) with CCDS, and 8/17 (47%) with DSA. With B-flow the extent of stenosis was appraised more precisely than with PD and CCDS (P<0.0001). In conclusion, B-flow is a reliable method for preocclusive stenosis of the ICA with less intrastenotic flow artefacts. B-flow facilitates the characterization of plaque morphologies.

show abstract

Section: Discussionmentioning

confidence: 96%

Diagnostics and characterisation of preocclusive stenoses and occlusions of the internal carotid artery with B-flow

et al. 2006

View full text Add to dashboard Cite

show abstract

“…We used planimetry to diagnose carotid restenosis of 50% to 69% because it provides an angiographic-like carotid stenosis measurement, with a good sonographic-angiographic agreement. [12][13][14][15][16][17][18] In addition, although there is a good agreement for severe stenosis between velocity parameters and planimetric data obtained by angiography or carotid ultrasound, 9,19,20 moderate stenoses are quantified less accurately by velocity parameters, 21 particularly in the setting of a multicenter study, which potentially increases variability of velocity measurements between centers. 9 In our study, the observed proportion of positive agreement between velocity and planimetric data were poor for the category of 50% to 69% restenosis (Table 3).…”

Section: Discussionmentioning

confidence: 99%

Restenosis Is More Frequent After Carotid Stenting Than After Endarterectomy

Arquizan

Trinquart

Touboul

et al. 2011

Stroke

174

138

View full text Add to dashboard Cite

for the EVA-3S InvestigatorsBackground and Purpose-Carotid angioplasty and stenting (CAS) may be more often associated with residual or recurrent stenosis than carotid endarterectomy (CEA). We compared the rates of restenosis in patients treated with CAS or CEA in the EVA-3S trial. Methods-Five hundred seven patients (242 treated by CAS and 265 by CEA) had carotid ultrasound follow-up (mean carotid ultrasound follow-up, 2.1 years) according to a predefined protocol. Carotid restenosis of 50% to 69% was diagnosed on planimetry, whereas carotid restenosis of Ն70% or occlusion was diagnosed using either planimetry or velocity criteria. Results-The rate of carotid restenosis of Ն50% or occlusion was significantly higher after CAS (12.5%) than after CEA (5.0%; time ratio, 0.16; 95% CI, 0.03-0.76; Pϭ0.02). The rates of severe restenosis of Ն70% or occlusion were low and did not differ significantly between the 2 groups (3-year rates are 3.3% in the CAS group and 2.8% in the CEA group). Age at baseline was the only vascular risk factor significantly associated with carotid restenosis. Our study could not detect any effect of carotid restenosis on ipsilateral stroke. Conclusions-The short-term rate of carotid restenosis of Ն50% or occlusion is Ϸ2.5-times more common after CAS than after CEA, a difference accounted for by an excess risk in moderate restenosis. More data with longer follow-up are needed to assess the rates of late severe restenosis and to determine the relation between restenosis and recurrent stroke over time.

show abstract

“…Consequently, the diameter measurements, too, depend on the investigator. Our own experience indicates that blooming artifacts do not occur in B-flow and that the color coding of the grey tones mostly anticipates the effect of contrast medium enhancement [32]. When there are circular calcifications, all US modalities encounter constraints: in some cases, areas of residual flow can be detected in the B-flow cross-section that can otherwise be demonstrated only after administering US contrast media with the CCDS and PD.…”

Section: Discussionmentioning

confidence: 97%

Color Doppler, power Doppler and B-flow ultrasound in the assessment of ICA stenosis: Comparison with 64-MD-CT angiography

et al. 2006

View full text Add to dashboard Cite

The purpose of this study is to investigate the diagnostic potential of color-coded Doppler sonography (CCDS), power-Doppler (PD) and B-flow ultrasound in assessing the degree of extracranial internal carotid artery (ICA) stenosis in comparison to CT-angiography (MD-CTA). Thirty-two consecutive patients referred for CTA with 41 ICA-stenoses were included in this prospective study. MD-CTA was performed using a 64 row scanner with a CTDIvol of 13.1 mGy/cm. In CTA, CCDS, PD and B-flow, the degree of stenosis was evaluated by the minimal intrastenotic diameter in comparison to the poststenotic diameter. Two radiologists performed a quantitative evaluation of the stenoses in consensus blinded to the results of ultrasound. These were correlated to CTA, CCDS, PD and B-flow, intraoperative findings and clinical follow-up. Grading of the stenoses in B-flow ultrasound outperformed the other techniques in terms of accuracy with a correlation coefficient to CTA of 0.88, while PD and CCDS measurements yield coefficients of 0.74 and 0.70. Bland-Altman analysis additionally shows a very little bias of the three US methods between 0.5 and 3.2 %. There is excellent correlation (coefficient 0.88, CI 0.77-0.93) with 64-MD-CTA and B-flow ultrasound in terms of accuracy for intrastenotic and poststenotic diameter. Duplex sonography is useful for screening purposes.

show abstract

Comparison of color-flow Doppler scanning, power Doppler scanning, and frequency shift for assessment of carotid artery stenosis

Abstract: CD and PD carotid artery stenosis measurements are highly reproducible, and in our hands provided accuracy equal to PSF.

Cited by 46 publications

References 20 publications

Diagnostics and characterisation of preocclusive stenoses and occlusions of the internal carotid artery with B-flow

Diagnostics and characterisation of preocclusive stenoses and occlusions of the internal carotid artery with B-flow

Restenosis Is More Frequent After Carotid Stenting Than After Endarterectomy

Color Doppler, power Doppler and B-flow ultrasound in the assessment of ICA stenosis: Comparison with 64-MD-CT angiography

Contact Info

Product

Resources

About