scholarly journals 4-Dimensionally Guided 3-Dimensional Color-Doppler Ultrasonography Quantifies Carotid Artery Stenosis With High Reproducibility and Accuracy

2018 ◽  
Vol 11 (3) ◽  
pp. 386-396 ◽  
Author(s):  
Roland Richard Macharzina ◽  
Sascha Kocher ◽  
Steven R. Messé ◽  
Thomas Rutkowski ◽  
Fabian Hoffmann ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Carotid Artery Stenosis ◽  
Doppler Ultrasonography ◽  
Color Doppler ◽  
Color Doppler Ultrasonography ◽  
Artery Stenosis ◽  
High Reproducibility ◽  
3 Dimensional

Abstract TP136: Four-dimensionally Guided Three-dimensional Color-doppler Ultrasonography Quantifies Carotid Artery Stenoses With Equally High Reproducibility and Accuracy Compared to Catheter Angiography

Stroke ◽  
2016 ◽  
Vol 47 (suppl_1) ◽  
Author(s):  
Roland Richard Macharzina ◽  
Sascha Kocher ◽  
Steven R Messé ◽  
Fabian Hoffmann ◽  
Thomas Rutkowski ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Doppler Ultrasonography ◽  
Binary Classification ◽  
Color Doppler ◽  
Pearson Correlation ◽  
Three Dimensional ◽  
Catheter Angiography ◽  
High Reproducibility ◽  
Stenosis Quantification ◽  
Stenosis Detection

Introduction: Clinical stratification in patients with ICAS largely depends on symptomatic status and stenosis grading. The purpose was to analyze the agreement and binary accuracy for the degree of internal carotid artery stenoses (ICAS) as determined by four-dimensional (4D) real-time guided three-dimensional color-Doppler (3DC) ultrasonography (4D/3DC-US) compared to catheter angiography (CA). Hypothesis: We hypothesized that 4D/3DC-US is non inferior to CA in grading ICAS in selected patients. Methods: Screening with 4D/3DC-US was performed in 93 patients (122 ICAS) admitted to our vascular center.Main exclusion criteria were insufficient image quality, previous revascularization and contraindications to CA. Eighty patients were prospectively examined in optimal planes with 4D-US assisted static 3DC-US color-Doppler (10MHz) followed by blinded multiplanar off-line rendering to determine %-NASCET stenosis. Multiplane selective CA of the same ICAS were quantified with dedicated software in a blinded fashion. Results: Quantitative CA of 103 stenoses with a mean degree of 65 ± 17% were compared to 4D/3DC-US resulting in a Pearson correlation coefficient of 0.89 and a standard deviation of differences (SDD) of 8.1% at a bias of +1.7%. Binary 50, 60 and 70%-stenosis detection with 3DC-US revealed an accuracy of 96, 89, 85%, a sensitivity of 97, 92, 87% and a specificity of 92, 83 and 84%. Interobserver SDD for CA of 52 stenoses (7.2%) did not differ from SDD between 3DC-US and CA (P = 0.274). Conclusions: 4D/3DC-US allowed good metric stenosis quantification and accurate binary classification with high reproducibility in a selected cohort.

scholarly journals Intrarenal Color Doppler Ultrasonography in the Diagnosis of Accessory Renal Artery Stenosis

2013 ◽  
Vol 2 (2) ◽  
pp. 59-64
Author(s):  
RK Rauniyar ◽  
DN Srivastava ◽  
CS Bal ◽  
SC Dash ◽  
M Berry
Keyword(s):  
Renal Artery ◽  
Renal Artery Stenosis ◽  
Doppler Ultrasonography ◽  
Color Doppler ◽  
Accurate Method ◽  
Color Doppler Ultrasonography ◽  
Artery Stenosis ◽  
Lower Pole ◽  
Accessory Renal Artery ◽  
Acceleration Time

Conventional color Doppler ultrasonography of main renal artery is a valuable non invasive tool in screening and diagnosing patients with renal artery stenosis. However, this technique suffer a set back from many limitations. Color Doppler ultrasonography examination of intrarenal branch arteries using the parameters like, acceleration time, acceleration time ratio, and acceleration index with additional sampling from upper and lower pole of kidney has shown good results in diagnosis of renal artery stenosis. We successfully diagnosed accessory renal artery stenosis in two patients using intrarenal Doppler technique. We conclude, intra renal Color Doppler ultrasonography with additional sampling from upper and lower pole is most accurate method for diagnosis of significant RAS including accessory RAS. Nepalese Journal of Radiology; Vol. 2; Issue 2; July-Dec. 2012; 59-64 DOI: http://dx.doi.org/10.3126/njr.v2i2.7687

Effect of Carotid Endarterectomy on Chronic Ocular Ischemic Syndrome Due to Internal Carotid Artery Stenosis

Neurosurgery ◽  
2001 ◽  
Vol 48 (2) ◽  
pp. 328-333 ◽  
Author(s):  
Shoichiro Kawaguchi ◽  
Shuzo Okuno ◽  
Toshisuke Sakaki ◽  
Norikiyo Nishikawa
Keyword(s):  
Carotid Artery ◽  
Internal Carotid Artery ◽  
Carotid Endarterectomy ◽  
Carotid Artery Stenosis ◽  
Ophthalmic Artery ◽  
Internal Carotid ◽  
Color Doppler ◽  
Internal Carotid Artery Stenosis ◽  
Artery Stenosis ◽  
Artery Flow

Abstract OBJECTIVE We evaluated the effect of carotid endarterectomy on chronic ocular ischemic syndrome due to internal carotid artery stenosis by use of data obtained from ophthalmic artery color Doppler flow imaging. METHODS We examined 11 patients with ocular ischemic syndrome due to internal carotid artery stenosis (>70% stenosis) who were being treated by carotid endarterectomy. Ophthalmic artery color Doppler flow imaging indicated ophthalmic artery flow direction and peak systolic flow velocity and was performed before and at 1 week, 1 month, and 3 months after surgery. RESULTS We assessed the ophthalmic arteries of 11 patients via color Doppler flow imaging. Before undergoing carotid endarterectomy, five patients showed reversed ophthalmic artery flow. In the other six patients who experienced antegrade ophthalmic artery flow, the average peak systolic flow velocity was 0.09 ± 0.05 m/s (mean ± standard deviation). Preoperative reversed flow resolved in each patient 1 week after undergoing surgery. All patients showed antegrade ophthalmic artery flow. The average peak systolic flow velocity in the patients who had preoperative antegrade flow rose significantly, to 0.21 ± 0.14 m/s (P < 0.05). There was no significant change as compared with findings at 1 week after surgery. During the follow-up period (mean, 32.4 mo), no patients complained of recurrent visual symptoms. At the end of the study period, visual acuity had improved in five patients and had not worsened in the other six patients. CONCLUSION Carotid endarterectomy was effective for improving or preventing the progress of chronic ocular ischemia caused by internal carotid artery stenosis.

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