Hyperpolarised gas filling station for medical imaging using polarised 129Xe and 3He
نویسندگان
چکیده
منابع مشابه
SSFP imaging of hyperpolarised 3He in the lungs at 3T
Introduction In previous work at 1.5T the magnetisation response of hyperpolarised (HP) He gas to a SSFP sequence was simulated using matrix product operators [1]. SNR gains over SPGR methods were also theoretically and experimentally demonstrated, with off-resonance artifacts observed due to B0 inhomogoneity over the lungs. In recent years there has been a focus on multi-nuclear MRI at higher ...
متن کاملCollisional 3He and 129Xe frequency shifts in Rb-noble-gas mixtures.
The Fermi-contact interaction that characterizes collisional spin exchange of a noble gas with an alkali-metal vapor also gives rise to NMR and EPR frequency shifts of the noble-gas nucleus and the alkali-metal atom, respectively. We have measured the enhancement factor κ0 that characterizes these shifts for Rb-129Xe to be 493±31, making use of the previously measured value of κ0 for Rb-3He. Th...
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BACKGROUND One of the central physiological functions of the lungs is to transfer inhaled gases from the alveoli to pulmonary capillary blood. However, current measures of alveolar gas uptake provide only global information and thus lack the sensitivity and specificity needed to account for regional variations in gas exchange. METHODS AND PRINCIPAL FINDINGS Here we exploit the solubility, hig...
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S. Patz, I. Muradian, M. I. Hrovat, J. P. Butler, G. P. Topulos, S. Ketel, I. C. Ruset, S. Covrig, F. W. Hersman Radiology, Brigham and Women's Hospital, Boston, MA, United States, Physics, University of New Hampshire, Durham, NH, United States, Mirtech, Inc., Brockton, MA, United States, Physiology, Harvard School of Public Health, Boston, MA, United States, Anesthesiology, Brigham and Women's...
متن کاملCompressed Sensing: Applications in Hyperpolarised 3He lung MRI
Introduction The polarisation in hyperpolarised (HP) He MRI is non-renewable and the scan time of both breath-hold and dynamic lung ventilation images is by necessity short. There is thus a demand to reduce the number of RF excitations needed to fully reconstruct an image and to speed up the acquisition. In previous work, parallel RF encoding [1], radial [2] and spiral [3] under-sampling method...
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ژورنال
عنوان ژورنال: Magnetic Resonance Imaging
سال: 2021
ISSN: 0730-725X
DOI: 10.1016/j.mri.2021.02.010