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Title

High time-resolved cardiac functional imaging using temporal regularization for small animal on a clinical 3T scanner
Authors
Delattre, Bénédicte
Van De Ville, Dimitri
Braunersreuther, Vincent
Pellieux, Corinne
Hyacinthe, Jean-Noël
Lerch, René
Mach, François
Vallée, Jean-Paul
Published in IEEE Transactions on Biomedical Engineering. 2012, vol. 59, no. 4, p. 929-35
Abstract Accurate assessment of mice cardiac function with magnetic resonance imaging is essential for longitudinal studies and for drug development related to cardiovascular diseases. Whereas dedicated small animal MR scanners are not readily available, it would be a great advantage to be able to perform cardiac assessment on clinical systems, in particular, in the context of translational research. However, mouse imaging remains challenging since it requires both high spatial and temporal resolutions, while gradient performances of clinical scanners often limit the reachable parameters. In this study, we propose a new cine sequence, named "interleaved cine," which combines two repetitions of a standard cine sequence shifted in time in order to reach resolution parameters compatible with mice imaging. More precisely, this sequence allows temporal resolution to be reduced to 6.8 ms instead of 13.5 ms initially imposed by the system's hardware. We also propose a two-step denoising algorithm to suppress some artifacts inherent to the new interleaved cine thus allowing an efficient enhancement of the image quality. In particular, we model and suppress the periodic intensity pattern and further denoise the sequence by soft thresholding of the temporal Fourier coefficients. This sequence was successfully validated with mass and function measurements on relevant mice models of cardiovascular diseases.
Keywords Algorithms — Animals — Hypertrophy, Left Ventricular/pathology/physiopathology — Image Enhancement/instrumentation/methods — Magnetic Resonance Imaging, Cine/instrumentation/methods/veterinary — Male — Mice — Mice, Inbred C57BL — Reproducibility of Results — Sensitivity and Specificity
Identifiers
PMID: 22057042
Full text
Article (Published version) (819 Kb) - document accessible for UNIGE members only Limited access to UNIGE
Structures
Faculté de médecine / Section de médecine clinique / Département de médecine interne des spécialités
Faculté de médecine / Section de médecine clinique / Département de radiologie et informatique médicale
Research groups Imagerie cardiaque fonctionnelle (541)
L'athérosclérose et ses complications cliniques (591)
Traitement d'images médicales (893)
Biologie du myocarde (22)
Citation
(ISO format) 		DELATTRE, Bénédicte et al. High time-resolved cardiac functional imaging using temporal regularization for small animal on a clinical 3T scanner. In: IEEE Transactions on Biomedical Engineering, 2012, vol. 59, n° 4, p. 929-35. https://archive-ouverte.unige.ch/unige:24418

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Deposited on : 2012-12-11

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