Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Salma Ajraoui"'
Publikováno v:
NMR in Biomedicine. 25:389-399
In hyperpolarised 3He lung MRI with constant flip angles, the transverse magnetisation decays with each RF excitation imposing a k-space filter on the acquired data. For radial data acquired in an angularly-sequential order, this filter causes streak
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6653c1963a3ad904996dd25e7588935d
https://doi.org/10.1002/nbm.1766
https://doi.org/10.1002/nbm.1766
Autor:
Helen Marshall, Jim M. Wild, Salma Ajraoui, Juan Parra-Robles, Martin H. Deppe, Matthew Clemence
Publikováno v:
NMR in Biomedicine. 25:44-51
In imaging of human lungs with hyperpolarised noble gases, measurements of apparent diffusion coefficient (ADC) and relaxation time provide valuable information for the assessment of lung microstructure. In this work, a sequence was developed for int
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d408aa7e93b0734e3208630d55f0571
https://doi.org/10.1002/nbm.1710
https://doi.org/10.1002/nbm.1710
Publikováno v:
Magnetic Resonance in Medicine. 65:1075-1083
Washout of inert gases is a measure of pulmonary function well-known in lung physiology. This work presents a method combining inert gas washout and spatially resolved imaging using hyperpolarized 3He, thus providing complementary information on lung
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d14dbd472960efb3beacfb41df921c28
https://doi.org/10.1002/mrm.22709
https://doi.org/10.1002/mrm.22709
Autor:
Salma Ajraoui, Helen Marshall, Jim M. Wild, Martin H. Deppe, Juan Parra-Robles, Rob H. Ireland, S. R. Parnell
Publikováno v:
NMR in Biomedicine. 24:130-134
The development of hybrid medical imaging scanners has allowed imaging with different detection modalities at the same time, providing different anatomical and functional information within the same physiological time course with the patient in the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c14f97ef2f71cc3268be371ffca77608
https://doi.org/10.1002/nbm.1565
https://doi.org/10.1002/nbm.1565
Publikováno v:
Journal of Magnetic Resonance. 204:228-238
Models of lung acinar geometry have been proposed to analytically describe the diffusion of (3)He in the lung (as measured with pulsed gradient spin echo (PGSE) methods) as a possible means of characterizing lung microstructure from measurement of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e385aed33b7406bb6548d6ec5a280f2
https://doi.org/10.1016/j.jmr.2010.02.023
https://doi.org/10.1016/j.jmr.2010.02.023
Publikováno v:
Magnetic Resonance in Medicine. 63:1059-1069
In this work, the application of compressed sensing techniques to the acquisition and reconstruction of hyperpolarized (3)He lung MR images was investigated. The sparsity of (3)He lung images in the wavelet domain was investigated through simulations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8bf1ac064ba12a709eac00efb12bacb
https://doi.org/10.1002/mrm.22302
https://doi.org/10.1002/mrm.22302
Autor:
Ralph Hashoian, Xiaojun Xu, Martin H. Deppe, Juan Parra-Robles, S. R. Parnell, Graham Norquay, Helen Marshall, Salma Ajraoui, Paul D. Griffiths, Jim M. Wild
Publikováno v:
Magnetic resonance in medicine. 68(6)
In this study, the signal-to-noise ratio of hyperpolarized (129)Xe human lung magnetic resonance imaging was compared at 1.5 T and 3 T. Experiments were performed at both B(0) fields with quadrature double Helmholtz transmit-receive chest coils of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::25a399eb3927fbe73b2673170618ca27
https://pubmed.ncbi.nlm.nih.gov/22294386
https://pubmed.ncbi.nlm.nih.gov/22294386
Publikováno v:
Magnetic resonance in medicine. 69(2)
Adding prior knowledge to compressed sensing reconstruction can improve image reconstruction. In this work, two approaches are investigated to improve reconstruction of two-dimensional hyperpolarized 3He lung ventilation images using prior knowledge.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2674ecaa92f01aadf250d945ea3ea1a
https://pubmed.ncbi.nlm.nih.gov/22473679
https://pubmed.ncbi.nlm.nih.gov/22473679
Publikováno v:
Magnetic resonance in medicine. 67(2)
The (3)He MR diffusion signal is sensitive to lung microstructure, but it is also affected by the presence of background field inhomogeneities induced by the magnetic susceptibility difference at the air-tissue interface. These susceptibility-induced
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d44b381240cc0d74411cc9b6093852d
https://pubmed.ncbi.nlm.nih.gov/22083758
https://pubmed.ncbi.nlm.nih.gov/22083758
Publikováno v:
NMR in biomedicine. 25(2)
In hyperpolarised (3)He lung MRI with constant flip angles, the transverse magnetisation decays with each RF excitation imposing a k-space filter on the acquired data. For radial data acquired in an angularly-sequential order, this filter causes stre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::77de2a23be3b19ba99361efc2a96b2da
https://pubmed.ncbi.nlm.nih.gov/21837646
https://pubmed.ncbi.nlm.nih.gov/21837646