Standard B-Mode Ultrasound Measures Local Carotid Artery Characteristics as Reliably as Radiofrequency Phase Tracking in Symptomatic Carotid Artery Patients.
Ultrasound Med Biol
; 42(2): 586-95, 2016 Feb.
Article
em En
| MEDLINE
| ID: mdl-26525651
ABSTRACT
Local arterial stiffness can be assessed with high accuracy and precision by measuring arterial distension on the basis of phase tracking of radiofrequency ultrasound signals acquired at a high frame rate. However, in clinical practice, B-mode ultrasound registrations are made at a low frame rate (20-50 Hz). We compared the accuracy and intra-subject precision of edge tracking and phase tracking distension in symptomatic carotid artery patients. B-mode ultrasound recordings (40 mm, 37 fps) and radiofrequency recordings (31 lines covering 29 mm, 300 fps) were acquired from the left common carotid artery of 30 patients (aged 45-88 y) with recent cerebrovascular events. To extract the distension, semi-automatic echo edge and phase tracking algorithms were applied to B-mode and radiofrequency recordings, respectively. Both methods exhibited a similar intra-subject precision for distension (standard deviation = 44 µm and 47 µm, p = 0.66) and mean distension (difference -6 ± 69 µm, p = 0.67). Intra-subject distension inhomogeneity tends to be larger for edge tracking (difference 15 ± 35 µm, p = 0.04). Standard B-mode scanners are suitable for measuring local artery characteristics in symptomatic carotid artery patients with good precision and accuracy.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Interpretação de Imagem Assistida por Computador
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Artérias Carótidas
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Doenças das Artérias Carótidas
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Rigidez Vascular
Tipo de estudo:
Diagnostic_studies
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Evaluation_studies
Limite:
Aged
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Female
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Humans
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Male
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article