Título:
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High-resolution dynamic cardiac MRI on small animals using reconstruction based on Split Bregman methodology
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Autor/a:
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Montesinos, P.; Abascal, Juan F.P.J.; Chamorro Servent, Judit; Chavarrías, Cristina; Benito, M.; Vaquero, Juan J.; Desco, Manuel
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Abstract:
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Comunicació presentada a: Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), celebrada del 23 al 29 d'octubre de 2011 a València. |
Abstract:
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Dynamic cardiac magnetic resonance imaging in
small animals is an important tool in the study of
cardiovascular diseases. The reduction of the long acquisition
times required for cardiovascular applications is crucial to
achieve good spatiotemporal resolution and signal-to-noise
ratio. Nowadays there are many acceleration techniques which
can reduce acquisition time, including compressed sensing
technique. Compressed sensing allows image reconstruction
from undersampled data, by means of a non linear
reconstruction which minimizes the total variation of the
image. The recently appeared Split Bregman methodology has
proved to be more computationally efficient to solve this
problem than classic optimization methods. In the case of
dynamic magnetic resonance imaging, compressed sensing can
exploit time sparsity by the minimization of total variation
across both space and time. In this work, we propose and
validate the Split Bregman method to minimize spatial and
time total variation, and apply this method to accelerate
cardiac cine acquisitions in rats. We found that applying a
quasi-random variable density pattern along the phaseencoding
direction, accelerations up to a factor 5 are possible
with low error. In the future, we expect to obtain higher
accelerations using spatiotemporal undersampling. |
Materia(s):
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-Biomedical imaging -Acceleration -Image coding |
Derechos:
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© 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
The final published article can be found at https://ieeexplore.ieee.org/document/6152633/
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Tipo de documento:
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Objeto de conferencia Artículo - Versión aceptada |
Editor:
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Institute of Electrical and Electronics Engineers (IEEE)
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