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A fast field-cycling MRI relaxometer for physical contrasts design and pre-clinical studies in small animals

Romero, Javier Agustin et al · Academic Press Inc Elsevier Science · 2020

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Autore / responsabile
Romero, Javier Agustin et al
Editore
Academic Press Inc Elsevier Science
Anno
2020
ISSN
1090-7807
ISSN
1090-7807
Lingua
Inglés

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We present a fast field-cycling NMR relaxometer with added magnetic resonance imaging capabilities. The instrument operates at a maximum proton Larmor frequency of 5 MHz for a sample volume of 35 mL. The magnetic field homogeneity across the sample is 1400 ppm. The main field is generated with a notch-coil electromagnet of own design, fed with a current whose stability is 220 ppm. We show that images of reasonable quality can still be produced under such conditions. The machine is being designed for concept testing of the involved instrumentation and specific contrast agents aimed for field-cycling magnetic resonance imaging applications. The general performance of the prototype was tested through localized relaxometry experiments, T1-dispersion weighted images, temperature maps and T1-weighted images at different magnetic field intensities. We introduce the concept of positive and negative contrast depending on the use of pre-polarized or non-polarized sequences. The system is being improved for pre-clinical studies in small animals. Fil: Romero, Javier Agustin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Universidad Nacional de Córdoba; Grupo de Resonancia Magnética Nuclear; Laboratorio de Relaxometría y Técnicas Especiales (LaRTE); Argentina Fil: Rodriguez, Gonzalo Gabriel. Universidad Nacional de Córdoba; Grupo de Resonancia Magnética Nuclear; Laboratorio de Relaxometría y Técnicas Especiales (LaRTE); Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina

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APA 7

Romero, J. A. E. A. (2020). A fast field-cycling MRI relaxometer for physical contrasts design and pre-clinical studies in small animals. http://hdl.handle.net/11336/124283

MLA

Romero, Javier Agustin et al. "A fast field-cycling MRI relaxometer for physical contrasts design and pre-clinical studies in small animals." 2020. http://hdl.handle.net/11336/124283.

Chicago

Romero, Javier Agustin et al. 2020. "A fast field-cycling MRI relaxometer for physical contrasts design and pre-clinical studies in small animals.". http://hdl.handle.net/11336/124283.

Harvard

Romero, J. A. E. A. 2020, A fast field-cycling MRI relaxometer for physical contrasts design and pre-clinical studies in small animals, Academic Press Inc Elsevier Science, available at: http://hdl.handle.net/11336/124283 [Accessed 9 Aug. 2026].

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Titolo
A fast field-cycling MRI relaxometer for physical contrasts design and pre-clinical studies in small animals
Autore / collaboratori
Romero, Javier Agustin et al
Editore
Academic Press Inc Elsevier Science
Anno di pubblicazione
2020
ISSN
1090-7807
ISSN
1090-7807
Lingua
Inglés

Soggetti

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CONTRAST; FIELD-CYCLING; MRI; NMR; RELAXOMETRY; https://purl.org/becyt/ford/1.3; https://purl.org/becyt/ford/1
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