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- W2077307303 abstract "Abstract We discuss a contrast method for nuclear magnetic resonance imaging (MRI) based on the nutation frequency dispersion of the NMR signal amplitude in the rotating frame. As a practical matter, we test the concept using a specially designed phantom with independent compartments containing doped water (with copper sulfate) and a liposome suspension prepared with dimyristoylphosphatidylcholine. This last was chosen due to the strong nutation frequency dispersion the sample shows as a consequence of the particular molecular order and dynamics of the lipids within the unilamellar membrane, a key factor for the proposed experiment. The used sequence for 1D imaging is a combination of a previously reported fixed lock-time relaxation experiment in the rotating frame and a simple gradient spin-eco. Gross differences exist between T 1 -weighted images in the rotating frame and the approach here presented. Resumen Se discute un metodo de contraste para imagenes por resonancia magnetica (IRM) basada en la dispersion de la frecuencia de nutacion en el sistema rotante de la senal magnetica nuclear. El concepto se somete a prueba utilizando un fantoma especialmente disenado con compartimentos independientes, uno de ellos conteniendo agua dopada (con sulfato de cobre) y el otro una suspension de liposomas en agua deuterada, preparada con DMPC. Esta ultima eleccion se debe a la importante dispersion que muestra la frecuencia de nutacion en este sistema debido a las propiedades de orden y dinamica molecular de los lipidos en las membranas, un factor clave para el experimento propuesto. La secuencia 1D utilizada para construir la imagen consiste en una combinacion de un experimento de relajacion a tiempo de lock fijo y un simple eco de espin obtenido aplicando un gradiente." @default.
- W2077307303 created "2016-06-24" @default.
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- W2077307303 date "2014-06-01" @default.
- W2077307303 modified "2023-10-04" @default.
- W2077307303 title "Molecular order sensitive MRI" @default.
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- W2077307303 doi "https://doi.org/10.1109/argencon.2014.6868580" @default.
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