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2 results on '"rat cartilage morphology"'

1. A Dedicated Two-Channel Phased-Array Receiver Coil for High-Resolution MRI of the Rat Knee Cartilage at 7 T.

Author

Rengle, Adrian, Armenean, Mircea, Bolbos, Radu, Goebel, Jean-Christophe, Pinzano-Watrin, Astrid, Saint-Jalmes, Hervé, Gillet, Pierre, and Beuf, Olivier

Subjects
*MAGNETIC resonance imaging, *KNEE, *CARTILAGE, *ANIMAL experimentation, *SIGNAL-to-noise ratio, *EQUIPMENT & supplies
Abstract

In the field of small animal studies, the array coil imaging has become increasingly important. In this paper, a dedicated two-channel array coil operating at 300 MHz (7 T) for high-resolution MRI (HR-MRI) of the rat knee cartilage is presented. The average gain in signal-to-noise ratio (SNR) compared to a 15-mm multipurpose surface coil was 2.2. This SNR gain was used to improve the spatial resolution of 3-D acquisitions by decreasing the voxel size from 59 × 59 × 156 μm³ to 51 × 51 × 94 μm³ without time penalty. Also, a set of two array coils was used to perform a simultaneous acquisition of both knee joints of a rat, maintaining the same scanning time without SNR or spatial resolution degradation compared to the single knee joint acquisition. This two-channel array coil is a key element to perform HR-MRI and extract cartilage morphological parameters such as thickness and volume. [ABSTRACT FROM AUTHOR]

Published
2009
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2. A dedicated two-channel phased-array receiver coil for high-resolution MRI of the rat knee cartilage at 7 T

Author

A. Rengle, Hervé Saint-Jalmes, Olivier Beuf, J.-C. Goebel, M. Armenean, Pierre Gillet, Astrid Pinzano-Watrin, Radu Bolbos, Centre de Recherche et d'Application en Traitement de l'Image et du Signal (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Supérieure Chimie Physique Électronique de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Physiopathologie, Pharmacologie et Ingénierie articulaires (PPIA), Université Henri Poincaré - Nancy 1 (UHP)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Traitement du Signal et de l'Image (LTSI), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), and Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)

Subjects
Cartilage, Articular, Phased array, [SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging, MESH: Equipment Failure Analysis, 02 engineering and technology, Knee Joint, 030218 nuclear medicine & medical imaging, MESH: Magnetic Resonance Imaging, 0302 clinical medicine, Data acquisition, rat cartilage morphology, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, MESH: Animals, Image resolution, medicine.diagnostic_test, MESH: Hindlimb, Equipment Design, Magnetic Resonance Imaging, Knee cartilage, Hindlimb, MESH: Reproducibility of Results, high-resolution MRI (HR-MRI), [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, [INFO.INFO-TI]Computer Science [cs]/Image Processing [eess.IV], [PHYS.PHYS.PHYS-MED-PH]Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], Computer-Aided Design, [SDV.IB]Life Sciences [q-bio]/Bioengineering, MESH: Image Enhancement, [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, MESH: Transducers, Materials science, Channel (digital image), MESH: Rats, 0206 medical engineering, Transducers, Biomedical Engineering, Sensitivity and Specificity, multiple acquisitions, 03 medical and health sciences, Magnetics, medicine, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Animals, MESH: Magnetics, phased-array coil, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Reproducibility of Results, MESH: Computer-Aided Design, Magnetic resonance imaging, Image Enhancement, 020601 biomedical engineering, MESH: Sensitivity and Specificity, Rats, Equipment Failure Analysis, High magnetic field strength, Signal-to-noise ratio (imaging), MESH: Cartilage, Articular, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology, Biomedical engineering, MESH: Equipment Design
Abstract

International audience; In the field of small animal studies, the array coil imaging has become increasingly important. In this paper, a dedicated two-channel array coil operating at 300 MHz (7 T) for high-resolution MRI (HR-MRI) of the rat knee cartilage is presented. The average gain in signal-to-noise ratio (SNR) compared to a 15-mm multipurpose surface coil was 2.2. This SNR gain was used to improve the spatial resolution of 3-D acquisitions by decreasing the voxel size from 59 x 59 x 156 microm(3) to 51 x 51 x 94 microm(3) without time penalty. Also, a set of two array coils was used to perform a simultaneous acquisition of both knee joints of a rat, maintaining the same scanning time without SNR or spatial resolution degradation compared to the single knee joint acquisition. This two-channel array coil is a key element to perform HR-MRI and extract cartilage morphological parameters such as thickness and volume.

Published
2009
Full Text
View/download PDF

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