1
|
Molway MJ, Bales-Shaffer L, Ranta K, Ball J, Sparling E, Prince M, Cocking D, Basler D, Murphy M, Kidd BE, Gafar AT, Porter J, Albin K, Rosen MS, Chekmenev EY, Michael Snow W, Barlow MJ, Goodson BM. Dramatic improvement in the "Bulk" hyperpolarization of 131Xe via spin exchange optical pumping probed using in situ low-field NMR. J Magn Reson 2023; 354:107521. [PMID: 37487304 DOI: 10.1016/j.jmr.2023.107521] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/26/2023]
Abstract
We report on hyperpolarization of quadrupolar (I=3/2) 131Xe via spin-exchange optical pumping. Observations of the 131Xe polarization dynamics via in situ low-field NMR show that the estimated alkali-metal/131Xe spin-exchange rates can be large enough to compete with 131Xe spin relaxation. 131Xe polarization up to 7.6±1.5% was achieved in ∼8.5×1020 spins-a ∼100-fold improvement in the total spin angular momentum-potentially enabling various applications, including: measurement of spin-dependent neutron-131Xe s-wave scattering; sensitive searches for time-reversal violation in neutron-131Xe interactions beyond the Standard Model; and surface-sensitive pulmonary MRI.
Collapse
Affiliation(s)
- Michael J Molway
- School of Chemical and Biomolecular Sciences, Southern Illinois University, Carbondale 62901, IL, USA
| | - Liana Bales-Shaffer
- School of Chemical and Biomolecular Sciences, Southern Illinois University, Carbondale 62901, IL, USA
| | - Kaili Ranta
- School of Chemical and Biomolecular Sciences, Southern Illinois University, Carbondale 62901, IL, USA
| | - James Ball
- School of Medicine, University of Nottingham, Queens Medical Centre, Nottingham, UK
| | - Eleanor Sparling
- School of Medicine, University of Nottingham, Queens Medical Centre, Nottingham, UK
| | - Mia Prince
- School of Medicine, University of Nottingham, Queens Medical Centre, Nottingham, UK
| | - Daniel Cocking
- School of Medicine, University of Nottingham, Queens Medical Centre, Nottingham, UK
| | - Dustin Basler
- School of Chemical and Biomolecular Sciences, Southern Illinois University, Carbondale 62901, IL, USA
| | - Megan Murphy
- School of Chemical and Biomolecular Sciences, Southern Illinois University, Carbondale 62901, IL, USA
| | - Bryce E Kidd
- School of Chemical and Biomolecular Sciences, Southern Illinois University, Carbondale 62901, IL, USA
| | - Abdulbasit Tobi Gafar
- School of Chemical and Biomolecular Sciences, Southern Illinois University, Carbondale 62901, IL, USA
| | - Justin Porter
- School of Chemical and Biomolecular Sciences, Southern Illinois University, Carbondale 62901, IL, USA
| | - Kierstyn Albin
- School of Chemical and Biomolecular Sciences, Southern Illinois University, Carbondale 62901, IL, USA
| | - Matthew S Rosen
- A.A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School, Boston 02129, MA, USA; Department of Physics, Harvard University, Cambridge 02138, MA, USA
| | - Eduard Y Chekmenev
- Department of Chemistry, Integrative Biosciences (Ibio), Karmanos Cancer Institute (KCI), Wayne State University, Detroit 48202, MI, USA; Russian Academy of Sciences, Leninskiy Prospekt 14, 119991 Moscow, Russia
| | - W Michael Snow
- Department of Physics, Indiana University, Bloomington, IN, USA
| | - Michael J Barlow
- School of Medicine, University of Nottingham, Queens Medical Centre, Nottingham, UK
| | - Boyd M Goodson
- School of Chemical and Biomolecular Sciences, Southern Illinois University, Carbondale 62901, IL, USA.
| |
Collapse
|
2
|
Cocking D, Damion RA, Franks H, Jaconelli M, Wilkinson D, Brook M, Auer DP, Bowtell R. Deuterium brain imaging at 7T during D 2 O dosing. Magn Reson Med 2023; 89:1514-1521. [PMID: 36426762 PMCID: PMC10099797 DOI: 10.1002/mrm.29539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/01/2022] [Accepted: 11/06/2022] [Indexed: 11/27/2022]
Abstract
PURPOSE To characterize the (2 H) deuterium MR signal measured from human brain at 7T in participants loading with D2 O to ˜1.5% enrichment over a six-week period. METHODS 2 H spectroscopy and imaging measurements were used to track the time-course of 2 H enrichment within the brain during the initial eight-hour loading period in two participants. Multi-echo gradient echo (MEGE) images were acquired at a range of TR values from four participants during the steady-state loading period and used for mapping 2 H T1 and T2 * relaxation times. Co-registration to higher resolution 1 H images allowed T1 and T2 * relaxation times of deuterium in HDO in cerebrospinal fluid (CSF), gray matter (GM), and white matter (WM) to be estimated. RESULTS 2 H concentrations measured during the eight-hour loading were consistent with values estimated from cumulative D2 O dose and body mass. Signal changes measured from three different regions of the brain during loading showed similar time-courses. After summing over echoes, gradient echo brain images acquired in 7.5 minutes with a voxel volume of 0.36 ml showed an SNR of ˜16 in subjects loaded to 1.5%. T1 -values for deuterium in HDO were significantly shorter than corresponding values for 1 H in H2 O, while T2 * values were similar. 2 H relaxation times in CSF were significantly longer than in GM or WM. CONCLUSION Deuterium MR Measurements at 7T were used to track the increase in concentration of 2 H in brain during heavy water loading. 2 H T1 and T2 * relaxation times from water in GM, WM, and CSF are reported.
Collapse
Affiliation(s)
- Daniel Cocking
- School of Physics and AstronomyUniversity of NottinghamNottinghamUK
- Sir Peter Mansfield Imaging CentreUniversity of NottinghamNottinghamUK
| | - Robin A. Damion
- Sir Peter Mansfield Imaging CentreUniversity of NottinghamNottinghamUK
- Mental Health and Clinical Neuroscience, School of MedicineUniversity of NottinghamNottinghamUK
- NIHR Nottingham Biomedical Research Centre/Nottingham Clinical Research FacilitiesQueen's Medical CentreNottinghamUK
| | - Hester Franks
- Centre for Cancer Sciences Biodiscovery Institute, School of MedicineUniversity of NottinghamNottinghamUK
- Department of OncologyNottingham University Hospitals NHS TrustNottinghamUK
| | - Matthew Jaconelli
- MRC‐Versus Arthritis Centre for Musculoskeletal Ageing ResearchUniversity of NottinghamNottinghamUK
- School of Life SciencesUniversity of NottinghamNottinghamUK
| | - Daniel Wilkinson
- MRC‐Versus Arthritis Centre for Musculoskeletal Ageing ResearchUniversity of NottinghamNottinghamUK
- Division of Medical Sciences and Graduate Entry MedicineSchool of Medicine, University of NottinghamNottinghamUK
| | - Matthew Brook
- NIHR Nottingham Biomedical Research Centre/Nottingham Clinical Research FacilitiesQueen's Medical CentreNottinghamUK
- MRC‐Versus Arthritis Centre for Musculoskeletal Ageing ResearchUniversity of NottinghamNottinghamUK
- School of Life SciencesUniversity of NottinghamNottinghamUK
| | - Dorothee P. Auer
- Sir Peter Mansfield Imaging CentreUniversity of NottinghamNottinghamUK
- Mental Health and Clinical Neuroscience, School of MedicineUniversity of NottinghamNottinghamUK
- NIHR Nottingham Biomedical Research Centre/Nottingham Clinical Research FacilitiesQueen's Medical CentreNottinghamUK
| | - Richard Bowtell
- School of Physics and AstronomyUniversity of NottinghamNottinghamUK
- Sir Peter Mansfield Imaging CentreUniversity of NottinghamNottinghamUK
- NIHR Nottingham Biomedical Research Centre/Nottingham Clinical Research FacilitiesQueen's Medical CentreNottinghamUK
| |
Collapse
|