منابع مشابه
Barbara Duncum
Barbara Mary Pycraft was born on 22 February 1910. Her father, William Pycraft, was an ornithologist on the staff of the Natural History Museum, South Kensington, and the author of several books. After reading history at London University she was appointed research assistant at the Wellcome Medical History Museum, still in Wigmore Street, in the spring of 1931. Her first work involved the class...
متن کامل3. Dixon
NATURE | VOL 411 | 14 JUNE 2001 | www.nature.com 843 Collectively, plants produce a remarkably diverse array of over 100,000 low-molecular-mass natural products, also known as secondary metabolites. Secondary metabolites are distinct from the components of intermediary (primary) metabolism in that they are generally nonessential for the basic metabolic processes of the plant. Most are derived f...
متن کاملDixon Reconstruction
This approach is particularly important at lower field strengths, where it is the preferred method of lipid suppression. At 0.5T and below, chemically selective excitation or saturation is impractical since the small fat/water spectral shift would require a very long RF pulse. For example, the minimum time for a spectral-spatial pulse at 0.5T is about 24 ms. Inversion recovery methods become le...
متن کاملCS-Dixon: Compressed Sensing for Water-Fat Dixon Reconstruction
Introduction: Water-fat separation is of interest in several MRI applications including fat suppression and fat quantification. Chemical shift imaging allows robust water-fat separation [1, 2], however the acquisition of multiple images results in prolonged scan time. Accelerated water-fat separation using compressed sensing (CS) was partly addressed in [3] by considering the separation as a sp...
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ژورنال
عنوان ژورنال: British Dental Journal
سال: 2021
ISSN: ['0007-0610', '1476-5373']
DOI: https://doi.org/10.1038/s41415-021-2661-4