Mathematical Modeling and Numerical Simulation of Magnetic Susceptibility Artifacts in Magnetic Resonance Imaging.
Comput Methods Biomech Biomed Engin
; 3(4): 335-349, 2000.
Article
em En
| MEDLINE
| ID: mdl-11264858
ABSTRACT
The technique used to recognise information in Magnetic Resonance Imaging (MRI) is based on electromagnetic fields. A linearly varying field (around 10(-2) Tesla per meter) is added to a strong homogeneous magnetic field (order of magnitude of approximately one Tesla). When these fields are disturbed by the presence of a paramagnetic material, in the sample for instance, the resulting image is usually distorted, these distortions being termed artifacts. Our goal is to present a method, assuming the field disturbances are known, to construct the resulting images. A mathematical model of the MRI process is developed. The way the images are distorted in intensity and shape is explained and an algorithm to simulate magnetic susceptibility artifacts is deduced.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Comput Methods Biomech Biomed Engin
Assunto da revista:
ENGENHARIA BIOMEDICA
/
FISIOLOGIA
Ano de publicação:
2000
Tipo de documento:
Article
País de afiliação:
França