3D dynamic model of healthy and pathologic arteries for ultrasound technique evaluation

A 3D model reproducing the biomechanical behavior of human blood vessels is presented. The model, based on a multilayer geometry composed of right generalized cylinders, enables the representation of different vessel morphologies, including bifurcations, either healthy or affected by stenoses. Using...

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Vydáno v:	Medical physics (Lancaster) Ročník 35; číslo 12; s. 5440 - 5450
Hlavní autoři:	Balocco, Simone, Basset, Olivier, Azencot, Jacques, Tortoli, Piero, Cachard, Christian
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	United States American Association of Physicists in Medicine 01.12.2008
Témata:	3D model acoustic Acoustics Algorithms arterial mechanics Arteries - diagnostic imaging Arteries - pathology Arteries - physiopathology bifurcation Bioengineering Biomechanics biomedical ultrasonics Blood Flow Velocity blood vessels Blood Vessels - diagnostic imaging Blood Vessels - pathology Computer Science Doppler effect Doppler ultrasonography Echocardiography - methods elasticity Engineering Sciences Erythrocytes - metabolism Finite Element Analysis Finite element calculations Finite element methods Flow visualization fluid dynamics Fluid mechanics Fluid mechanics and rheology Fluids mechanics Fourier Analysis General theory and mathematical aspects haemodynamics Hemodynamics Humans Image Processing image segmentation Imaging Imaging, Three-Dimensional - methods Life Sciences Mechanics Mechanics of materials medical image processing Medical Imaging Models, Theoretical phantoms Phantoms, Imaging Physics physiological models Pressure Segmentation Signal and Image Processing Software Tissues Ultrasonics Ultrasonography Ultrasonography - methods ultrasound measurements Vascular system 3D model acoustic fluid dynamics arterial mechanics ultrasound measurements
ISSN:	0094-2405, 2473-4209
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Popis
Shrnutí:	A 3D model reproducing the biomechanical behavior of human blood vessels is presented. The model, based on a multilayer geometry composed of right generalized cylinders, enables the representation of different vessel morphologies, including bifurcations, either healthy or affected by stenoses. Using a finite element approach, blood flow is simulated by considering a dynamic displacement of the scatterers (erythrocytes), while arterial pulsation due to the hydraulic pressure is taken into account through a fluid-structure interaction based on a wall model. Each region is acoustically characterized using FIELD II software, which produces the radio frequency echo signals corresponding to echographic scans. Three acoustic physiological phantoms of carotid arteries surrounded by elastic tissue are presented to illustrate the model’s capability. The first corresponds to a healthy blood vessel, the second includes a 50% stenosis, and the third represents a carotid bifurcation. Examples of M mode, B mode and color Doppler images derived from these phantoms are shown. Two examples of M -mode image segmentation and the identification of the atherosclerotic plaque boundaries on Doppler color images are reported. The model could be used as a tool for the preliminary evaluation of ultrasound signal processing and visualization techniques.
Bibliografie:	balocco.simone@gmail.com Electronic mail ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0094-2405 2473-4209
DOI:	10.1118/1.3006948