Carotid plaque: comparison between visual and grey-scale median analysis

Mayor, I; Momjian, Shahan; Lalive, Patrice H.; Sztajzel, Roman

doi:10.1016/s0301-5629(03)00905-0

Cited by 47 publications

(28 citation statements)

References 25 publications

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“…The concept of quantitative evaluation of the echogenicity has actually been applied in many areas, such as thyroid glands, 13 carotid plaques, 14,15 and perianal Crohn's disease. 16 In an obstetric study in the evaluation of the placenta, MGV was similar in placentas of all women regardless of maternal age and parity.…”

Section: Discussionmentioning

confidence: 99%

Mean grey value is lower in endometriomas: Differentiating a hypoechogenic adnexal cyst by 3-dimensional power Doppler ultrasound—A preliminary study

Huang

Wang

et al. 2011

Journal of the Chinese Medical Association

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Section: Discussionmentioning

confidence: 99%

Mean grey value is lower in endometriomas: Differentiating a hypoechogenic adnexal cyst by 3-dimensional power Doppler ultrasound—A preliminary study

Huang

Wang

et al. 2011

Journal of the Chinese Medical Association

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“…gray-scale median analysis – GSM) has been used as an objective evaluation [6]; however, this method requires a sophisticated setup including computers and software. Good concordance between visual analysis and computerized measurement of GSM was reported, and it was suggested as a valuable method in daily clinical practice [22]. Secondly, we evaluated plaque morphology, but other determinants of severity of carotid atherosclerosis, such as the degree of stenosis, were not investigated.…”

Section: Discussionmentioning

confidence: 99%

Clustering of Risk Factors Increases the Incidence of Echolucent Carotid Plaque in Stroke Patients

Yamashiro¹,

Watanabe²,

Tanaka³

et al. 2006

Cerebrovasc Dis

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Background: The purpose of this study was to assess the influence of clusters of risk factors on the incidence of echolucent carotid plaque in stroke patients. Methods: A retrospective analysis of 413 stroke patients who had undergone carotid ultrasonography was performed. High-resolution B-mode ultrasonography was used to evaluate the characteristics of carotid plaque. We investigated the relationships between the incidence of echolucent carotid plaque and clustering of risk factors (hypertension, diabetes mellitus and hyperlipidemia) and stroke subtypes and transient ischemic attack (TIA). Results: Echolucent plaques were present in 10.5% of patients free of risk factors, in 18.8% with a single risk factor (NS), in 27.7% with two risk factors (p <0.01) and in 50.0% with three risk factors (p <0.001), and were significantly more common in patients with multiple risk factors (odds ratio 1.79; 95% CI, 1.05–3.06; p = 0.045). Echolucent plaques were observed in 41.2% of patients with atherothrombotic infarction, in 17.6% with lacunar infarction, in 11.5% with cardioembolic stroke, and in 25.0% with TIA, and were significantly more common in patients with atherothrombotic infarction than in those with lacunar infarction or cardioembolic stroke (p<0.001), or in those with TIA (p <0.05). Conclusions: The clustering of risk factors increased the incidence of echolucent carotid plaque. Patients with multiple risk factors were at increased risk of echolucent plaque, and these had a significant relationship with atherothrombotic infarction compared with other stroke subtypes and TIA.

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“…21 To provide more objective descriptions, more detailed classifications were developed; 22,23 however, with a weak interobserver agreement and only little correlation with the histopathological findings. [22][23][24][25][26][27][28][29][30] An alternative approach was quantification of the echogenicity of the plaque by means of a computer-assisted analysis. As mentioned previously, the GSM is a global measure of total plaque brightness and, as such, does not reflect regional variations within the plaque.…”

Section: Discussionmentioning

confidence: 99%

Stratified Gray-Scale Median Analysis and Color Mapping of the Carotid Plaque

Sztajzel

Momjian

Momjian-Mayor

et al. 2005

Stroke

111

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Background and Purpose-To determine whether a stratified gray-scale median (GSM) analysis of the carotid plaque combined with color mapping could predict plaque histology better than an overall GSM measurement. Methods-Thirty-one carotid plaques derived from 28 patients undergoing carotid endarterectomy were investigated by ultrasound. GSMs of the whole plaque were used as measurement of echogenicity. A profile of the regional GSM as a function of distance from the plaque surface could be generated. Plaque pixels were further mapped into 3 different colors depending on their GSM value. Results-Plaques with large calcifications presented the highest GSM values, and those with large hemorrhagic areas or with a predominant necrotic core exhibited the lowest. Fibrous plaques had intermediate GSM values. A necrotic core located in a juxtalumenal position was associated with significantly lower GSM values (Pϭ0.009) and with a predominant red color (GSM Ͻ50) at the surface (Pϭ0.0019). With respect to the thickness of the fibrous cap and the position of the necrotic core, the sensitivity and specificity of the predominant red color of the whole plaque was respectively 45% and 67% and 53% and 75%; considering the predominant red color of the surface, the sensitivity and specificity increased to 73% and 67% and 84% and 75%, respectively. Conclusions-The stratified GSM measurement combined with color mapping showed a good correlation with the different histopathological components and further allowed identification with good accuracy of determinants of plaque instability. This approach should be investigated in a prospective, natural history study.

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Carotid plaque: comparison between visual and grey-scale median analysis

Cited by 47 publications

References 25 publications

Mean grey value is lower in endometriomas: Differentiating a hypoechogenic adnexal cyst by 3-dimensional power Doppler ultrasound—A preliminary study

Mean grey value is lower in endometriomas: Differentiating a hypoechogenic adnexal cyst by 3-dimensional power Doppler ultrasound—A preliminary study

Clustering of Risk Factors Increases the Incidence of Echolucent Carotid Plaque in Stroke Patients

Stratified Gray-Scale Median Analysis and Color Mapping of the Carotid Plaque

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