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- W2079702562 abstract "Multipoint k-space mapping is a hybrid between constant-time (single-point mapping) and spin-warp imaging, involving sampling of a k-line segment of r points per TR cycle. In this work the method was implemented for NMR imaging of semi-solid materials on a 400 MHz micro-imaging system and two different k-space sampling strategies were investigated to minimize the adverse effects from relaxation-induced k-space signal modulation. Signal attenuation from T(2) decay results in artifacts whose nature depends on the k-space sampling strategy. The artifacts can be minimized by increasing the readout gradient amplitude, by PSF deconvolution or by oversampling in readout direction. Finally, implementation of a T(2) selective RF excitation demonstrates the feasibility of obtaining short-T(2) contrast even in the presence of tissues with long-T(2). The method's potential is illustrated with 3D proton images of short-T(2) materials such as synthetic polymers and bone." @default.
- W2079702562 created "2016-06-24" @default.
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- W2079702562 date "2003-02-01" @default.
- W2079702562 modified "2023-09-27" @default.
- W2079702562 title "Multipoint mapping for imaging of semi-solid materials" @default.
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- W2079702562 doi "https://doi.org/10.1016/s1090-7807(02)00136-2" @default.
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