Vector Doppler imaging of a spinning disc ultrasound Doppler phantom.
Ultrasound Med Biol
; 32(7): 1037-46, 2006 Jul.
Article
em En
| MEDLINE
| ID: mdl-16829317
ABSTRACT
Vector Doppler methods are used to obtain angle independent in-plane velocity information. Velocity magnitude as well as direction are reconstructed from regular steered colour flow and from split-aperture Doppler acquisitions. Spatially resolved in-plane velocity was obtained through Doppler colour flow mode and subsequent data triangulation. A depth-invariant constant Doppler angle was achieved by using a depth expanding transmit-receive Doppler aperture. Velocities of up to 50 cm s(-1) and 360 degrees vector velocity directions were measured. This was achieved by creating a spinning solid disc phantom. Such a phantom was built to allow underwater mounting and spinning of a solid disc-shaped ultrasound phantom (maximum velocity of 50 cm s-1). Doppler triangulation was realised by steered Doppler and by a split-aperture approach. Results of both imaging methods are shown. Split-aperture results showed errors of less then 10% for velocity magnitude estimation and less then 2.5 degrees for directional information.
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Base de dados:
MEDLINE
Assunto principal:
Interpretação de Imagem Assistida por Computador
/
Ultrassonografia Doppler em Cores
Limite:
Humans
Idioma:
En
Revista:
Ultrasound Med Biol
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Estados Unidos