PVR: Patch-to-Volume Reconstruction for Large Area Motion Correction of Fetal MRI.
IEEE Trans Med Imaging
; 36(10): 2031-2044, 2017 10.
Article
en En
| MEDLINE
| ID: mdl-28880160
ABSTRACT
In this paper, we present a novel method for the correction of motion artifacts that are present in fetal magnetic resonance imaging (MRI) scans of the whole uterus. Contrary to current slice-to-volume registration (SVR) methods, requiring an inflexible anatomical enclosure of a single investigated organ, the proposed patch-to-volume reconstruction (PVR) approach is able to reconstruct a large field of view of non-rigidly deforming structures. It relaxes rigid motion assumptions by introducing a specific amount of redundant information that is exploited with parallelized patchwise optimization, super-resolution, and automatic outlier rejection. We further describe and provide an efficient parallel implementation of PVR allowing its execution within reasonable time on commercially available graphics processing units, enabling its use in the clinical practice. We evaluate PVR's computational overhead compared with standard methods and observe improved reconstruction accuracy in the presence of affine motion artifacts compared with conventional SVR in synthetic experiments. Furthermore, we have evaluated our method qualitatively and quantitatively on real fetal MRI data subject to maternal breathing and sudden fetal movements. We evaluate peak-signal-to-noise ratio, structural similarity index, and cross correlation with respect to the originally acquired data and provide a method for visual inspection of reconstruction uncertainty. We further evaluate the distance error for selected anatomical landmarks in the fetal head, as well as calculating the mean and maximum displacements resulting from automatic non-rigid registration to a motion-free ground truth image. These experiments demonstrate a successful application of PVR motion compensation to the whole fetal body, uterus, and placenta.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Diagnóstico Prenatal
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Procesamiento de Imagen Asistido por Computador
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Imagen por Resonancia Magnética
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Feto
Tipo de estudio:
Diagnostic_studies
Límite:
Female
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Humans
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Pregnancy
Idioma:
En
Año:
2017
Tipo del documento:
Article