Two-dimensional phase correction method for single and multi-shot echo planar imaging.
Magn Reson Med
; 66(6): 1616-26, 2011 Dec.
Article
en En
| MEDLINE
| ID: mdl-21574178
ABSTRACT
Ghost artifacts are a serious issue in single and multi-shot echo planar imaging. Because of these coherent artifacts, it is essential to consistently suppress the ghosts. In this article, we present a phase correction algorithm that achieves excellent ghost suppression for single and multi-shot echo planar imaging. The phase correction is performed along both the x (read) direction and y (phase) direction. To this end, we apply a double field of view prescan and compute the phase required for ghost suppression. This phase is fitted to a 2D polynomial. The fitted phase is used to correct the echo planar imaging images. The correction algorithm can be used with any readout gradient polarities and any number of shots. A flow chart of the correction method is provided to better clarify the full process. Finally, phantom and volunteer images demonstrate the improvement of artifact suppression obtained with this algorithm over conventional phase correction methods.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Algoritmos
/
Encéfalo
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Reconocimiento de Normas Patrones Automatizadas
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Interpretación de Imagen Asistida por Computador
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Aumento de la Imagen
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Artefactos
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Imagen Eco-Planar
Tipo de estudio:
Diagnostic_studies
Límite:
Humans
Idioma:
En
Revista:
Magn Reson Med
Asunto de la revista:
DIAGNOSTICO POR IMAGEM
Año:
2011
Tipo del documento:
Article
País de afiliación:
Israel