Bolus characteristics based on Magnetic Resonance Angiography.
Biomed Eng Online
; 5: 53, 2006 Oct 17.
Article
em En
| MEDLINE
| ID: mdl-17044929
ABSTRACT
BACKGROUND:
A detailed contrast bolus propagation model is essential for optimizing bolus-chasing Computed Tomography Angiography (CTA). Bolus characteristics were studied using bolus-timing datasets from Magnetic Resonance Angiography (MRA) for adaptive controller design and validation.METHODS:
MRA bolus-timing datasets of the aorta in thirty patients were analyzed by a program developed with MATLAB. Bolus characteristics, such as peak position, dispersion and bolus velocity, were studied. The bolus profile was fit to a convolution function, which would serve as a mathematical model of bolus propagation in future controller design.RESULTS:
The maximum speed of the bolus in the aorta ranged from 5-13 cm/s and the dwell time ranged from 7-13 seconds. Bolus characteristics were well described by the proposed propagation model, which included the exact functional relationships between the parameters and aortic location.CONCLUSION:
The convolution function describes bolus dynamics reasonably well and could be used to implement the adaptive controller design.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Interpretação de Imagem Assistida por Computador
/
Angiografia por Ressonância Magnética
/
Meios de Contraste
/
Doenças das Valvas Cardíacas
/
Modelos Cardiovasculares
Tipo de estudo:
Evaluation_studies
/
Observational_studies
/
Prognostic_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2006
Tipo de documento:
Article