Showing 50 publications by Thomas Okell
Brain Perfusion Imaging of a Large Population: Arterial Spin Labelling MRI in UK Biobank
Okell TW, Xu X, Craig M, Alfaro-Almagro F, Thomas DL et al. (2025)
Brain Perfusion Imaging of a Large Population: Arterial Spin Labelling MRI in UK Biobank
Okell TW, Xu X, Craig M, Alfaro-Almagro F, Thomas DL et al. (2025)
Few‐shot learning for highly accelerated 3D time‐of‐flight MRA reconstruction
Li H, Chiew M, Dragonu I, Jezzard P & Okell TW (2025), Magnetic Resonance in Medicine
Combined angiography and perfusion using radial imaging and arterial spin labeling with structural contrast
Okell TW, Woods JG & Chiew M (2025), Magnetic Resonance in Medicine
Dynamic pseudo‐continuous arterial spin labeling angiography using a 3D ‐radial multi‐spoke spoiled gradient‐recalled sequence
Petrovic A, Soellradl M, Okell TW, Gauden A, Lai L et al. (2025), Magnetic Resonance in Medicine
BibTeX
@article{dynamicpseudoco-2025/9,
title={Dynamic pseudo‐continuous arterial spin labeling angiography using a 3D ‐radial multi‐spoke spoiled gradient‐recalled sequence},
author={Petrovic A, Soellradl M, Okell TW, Gauden A, Lai L et al.},
journal={Magnetic Resonance in Medicine},
publisher={Wiley},
year = "2025"
}
Achieving robust labeling above the circle of Willis with vessel‐encoded arterial spin labeling
Li H, Ji Y, Wang H, Chen Z, Qian T et al. (2025), Magnetic Resonance in Medicine
SNR ‐efficient whole‐brain pseudo‐continuous arterial spin labeling perfusion imaging at 7 T
Woods JG, Ji Y, Li H, Hess AT & Okell TW (2025), Magnetic Resonance in Medicine
Dynamic B0 field shimming for improving pseudo-continuous arterial spin labeling at 7 Tesla
Ji Y, Woods J, Li H & Okell T (2024), Magnetic Resonance in Medicine, 93(4), 1674-1689
Ultra‐high temporal resolution 4D angiography using arterial spin labeling with subspace reconstruction
Shen Q, Wu W, Chiew M, Ji Y, Woods JG et al. (2024), Magnetic Resonance in Medicine
Trial of the cerebral perfusion response to sodium nitrite infusion in patients with acute subarachnoid haemorrhage using arterial spin labelling MRI.
Ezra M, Franko E, Spronk DB, Lamb C, Okell TW et al. (2024), Nitric oxide : biology and chemistry, 153, 50-60
BibTeX
@article{trialofthecereb-2024/10,
title={Trial of the cerebral perfusion response to sodium nitrite infusion in patients with acute subarachnoid haemorrhage using arterial spin labelling MRI.},
author={Ezra M, Franko E, Spronk DB, Lamb C, Okell TW et al.},
journal={Nitric oxide : biology and chemistry},
volume={153},
pages={50-60},
publisher={Elsevier},
year = "2024"
}
Improved visualization of intracranial distal arteries with multiple 2D slice dynamic ASL ‐ MRA and super‐resolution convolutional neural network
Suzuki Y, Koktzoglou I, Li Z, Jezzard P & Okell T (2024), Magnetic Resonance in Medicine
BibTeX
@article{improvedvisuali-2024/8,
title={Improved visualization of intracranial distal arteries with multiple 2D slice dynamic ASL ‐ MRA and super‐resolution convolutional neural network},
author={Suzuki Y, Koktzoglou I, Li Z, Jezzard P & Okell T},
journal={Magnetic Resonance in Medicine},
publisher={Wiley},
year = "2024"
}
Efficient 3D cone trajectory design for improved combined angiographic and perfusion imaging using arterial spin labeling
Shen Q, Wu W, Chiew M, Ji Y, Woods J et al. (2024), Magnetic Resonance in Medicine, 92(4), 1568-1583
BibTeX
@article{efficientdconet-2024/5,
title={Efficient 3D cone trajectory design for improved combined angiographic and perfusion imaging using arterial spin labeling},
author={Shen Q, Wu W, Chiew M, Ji Y, Woods J et al.},
journal={Magnetic Resonance in Medicine},
volume={92},
pages={1568-1583},
publisher={Wiley},
year = "2024"
}
Recommendations for quantitative cerebral perfusion MRI using multi-timepoint arterial spin labeling: acquisition, quantification, and clinical applications
Woods JG, Achten E, Asllani I, Bolar DS, Dai W et al. (2024), Magnetic Resonance in Medicine, 92(2), 469-495
BibTeX
@article{recommendations-2024/4,
title={Recommendations for quantitative cerebral perfusion MRI using multi-timepoint arterial spin labeling: acquisition, quantification, and clinical applications},
author={Woods JG, Achten E, Asllani I, Bolar DS, Dai W et al.},
journal={Magnetic Resonance in Medicine},
volume={92},
pages={469-495},
publisher={Wiley},
year = "2024"
}
The past, present, and future of the brain imaging data structure (BIDS)
Poldrack RA, Markiewicz CJ, Appelhoff S, Ashar YK, Auer T et al. (2024), Imaging Neuroscience, 2, 1-19
The Past, Present, and Future of the Brain Imaging Data Structure (BIDS)
Poldrack RA, Markiewicz CJ, Appelhoff S, Ashar YK, Auer T et al. (2023)
The Past, Present, and Future of the Brain Imaging Data Structure (BIDS).
Poldrack RA, Markiewicz CJ, Appelhoff S, Ashar YK, Auer T et al. (2023)
BibTeX
@misc{thepastpresenta-2023/9,
title={The Past, Present, and Future of the Brain Imaging Data Structure (BIDS).},
author={Poldrack RA, Markiewicz CJ, Appelhoff S, Ashar YK, Auer T et al.},
year = "2023"
}
Research culture: why every lab needs a handbook
Tendler BC, Welland M & Miller KL (2023), eLife, 12
Highly accelerated intracranial time-of-flight magnetic resonance angiography using wave-encoding
Ji Y, Wu W, De Buck M, Okell T & Jezzard P (2023), Magnetic Resonance in Medicine, 90(2), 432-443
BibTeX
@article{highlyaccelerat-2023/4,
title={Highly accelerated intracranial time-of-flight magnetic resonance angiography using wave-encoding},
author={Ji Y, Wu W, De Buck M, Okell T & Jezzard P},
journal={Magnetic Resonance in Medicine},
volume={90},
pages={432-443},
publisher={Wiley},
year = "2023"
}
Aerobic exercise increases brain vessel lumen size and blood flow in young adults with elevated blood pressure. Secondary analysis of the TEPHRA randomized clinical trial
Lapidaire W, Forkert ND, Williamson W, Huckstep O, Tan CMJ et al. (2023), NeuroImage: Clinical, 37
BibTeX
@article{aerobicexercise-2023/1,
title={Aerobic exercise increases brain vessel lumen size and blood flow in young adults with elevated blood pressure. Secondary analysis of the TEPHRA randomized clinical trial},
author={Lapidaire W, Forkert ND, Williamson W, Huckstep O, Tan CMJ et al.},
journal={NeuroImage: Clinical},
volume={37},
number={103337},
publisher={Elsevier},
year = "2023"
}
Optimization of 4D combined angiography and perfusion using radial imaging and arterial spin labeling
Okell T & Chiew M (2022), Magnetic Resonance in Medicine, 89(5), 1853-1870
Time-encoded pseudo-continuous arterial spin labeling: increasing SNR in ASL dynamic angiography
Woods J, Schauman SS, Chiew M, Chappell M & Okell T (2022), Magnetic Resonance in Medicine, 89(4), 1323-1341
BibTeX
@article{timeencodedpseu-2022/10,
title={Time-encoded pseudo-continuous arterial spin labeling: increasing SNR in ASL dynamic angiography},
author={Woods J, Schauman SS, Chiew M, Chappell M & Okell T},
journal={Magnetic Resonance in Medicine},
volume={89},
pages={1323-1341},
publisher={Wiley},
year = "2022"
}
ASL-BIDS, the brain imaging data structure extension for arterial spin labeling
Clement P, Castellaro M, Okell TW, Thomas DL, Vandemaele P et al. (2022), Scientific Data, 9(1)
BibTeX
@article{aslbidsthebrain-2022/9,
title={ASL-BIDS, the brain imaging data structure extension for arterial spin labeling},
author={Clement P, Castellaro M, Okell TW, Thomas DL, Vandemaele P et al.},
journal={Scientific Data},
volume={9},
number={543},
publisher={Springer Nature},
year = "2022"
}
Reliability of multi-site UK Biobank MRI brain phenotypes for the assessment of neuropsychiatric complications of SARS-CoV-2 infection: the COVID-CNS travelling heads study
Duff E, Zelaya F, Almagro FA, Miller KL, Martin N et al. (2022), PLoS One, 17(9), e0273704
BibTeX
@article{reliabilityofmu-2022/9,
title={Reliability of multi-site UK Biobank MRI brain phenotypes for the assessment of neuropsychiatric complications of SARS-CoV-2 infection: the COVID-CNS travelling heads study},
author={Duff E, Zelaya F, Almagro FA, Miller KL, Martin N et al.},
journal={PLoS One},
volume={17},
pages={e0273704},
publisher={Public Library of Science},
year = "2022"
}
Recent technical developments in ASL: a review of the state of the art
Hernandez-Garcia L, Aramendia V, Bolar D, Dai W, Fernández-Seara M et al. (2022), Magnetic Resonance in Medicine, 88(5), 2021-2042
BibTeX
@article{recenttechnical-2022/8,
title={Recent technical developments in ASL: a review of the state of the art},
author={Hernandez-Garcia L, Aramendia V, Bolar D, Dai W, Fernández-Seara M et al.},
journal={Magnetic Resonance in Medicine},
volume={88},
pages={2021-2042},
publisher={Wiley},
year = "2022"
}
Time-encoded pseudo-continuous arterial spin labeling: increasing SNR in ASL angiography
Woods JG, Schauman SS, Chiew M, Chappell MA & Okell TW (2022)
Combined angiographic, structural and perfusion radial imaging using arterial spin labeling
Okell T, Woods JG & Chiew M (2022), Proceedings of the Joint Annual Meeting ISMRM-ESMRMB & ISMRT 31st Annual Meeting 2022
Quantitative chemical exchange saturation transfer imaging of nuclear overhauser effects in acute ischemic stroke
Msayib Y, Harston GWJ, Ray KJ, Larkin JR, Sutherland BA et al. (2022), Magnetic Resonance in Medicine, 88(1), 341-356
BibTeX
@article{quantitativeche-2022/3,
title={Quantitative chemical exchange saturation transfer imaging of nuclear overhauser effects in acute ischemic stroke},
author={Msayib Y, Harston GWJ, Ray KJ, Larkin JR, Sutherland BA et al.},
journal={Magnetic Resonance in Medicine},
volume={88},
pages={341-356},
publisher={Wiley},
year = "2022"
}
Adapting the UK Biobank brain imaging protocol and analysis pipeline for the C-MORE multi-organ study of COVID-19 survivors
Griffanti L, Raman B, Alfaro-Almagro F, Filippini N, Cassar MP et al. (2021), Frontiers in Neurology, 12
BibTeX
@article{adaptingtheukbi-2021/10,
title={Adapting the UK Biobank brain imaging protocol and analysis pipeline for the C-MORE multi-organ study of COVID-19 survivors},
author={Griffanti L, Raman B, Alfaro-Almagro F, Filippini N, Cassar MP et al.},
journal={Frontiers in Neurology},
volume={12},
number={753284},
publisher={Frontiers Media},
year = "2021"
}
Time-encoded golden angle radial arterial spin labeling: simultaneous acquisition of angiography and perfusion data
van der Plas MCE, Schmid S, Versluis MJ, Okell T & van Osch MJP (2021), NMR in Biomedicine, 34(7)
BibTeX
@article{timeencodedgold-2021/5,
title={Time-encoded golden angle radial arterial spin labeling: simultaneous acquisition of angiography and perfusion data},
author={van der Plas MCE, Schmid S, Versluis MJ, Okell T & van Osch MJP},
journal={NMR in Biomedicine},
volume={34},
number={e4519},
publisher={Wiley},
year = "2021"
}
Examination of optimized protocols for pCASL: Sensitivity to macrovascular contamination, flow dispersion, and prolonged arterial transit time
Woods JG, Okell TW & Chappell MA (2021), Magnetic Resonance in Medicine, 86(4), 2208-2219
BibTeX
@article{examinationofop-2021/5,
title={Examination of optimized protocols for pCASL: Sensitivity to macrovascular contamination, flow dispersion, and prolonged arterial transit time},
author={Woods JG, Okell TW & Chappell MA},
journal={Magnetic Resonance in Medicine},
volume={86},
pages={2208-2219},
publisher={International Society for Magnetic Resonance in Medicine},
year = "2021"
}
Adapting the UK Biobank brain imaging protocol and analysis pipeline for the C-MORE multi-organ study of COVID-19 survivors
Griffanti L, Raman B, Alfaro-Almagro F, Filippini N, Cassar MP et al. (2021)
Study protocol: the Heart and Brain study
Suri S, Bulte D, Chiesa ST, Ebmeier KP, Jezzard P et al. (2021), Frontiers in Physiology, 12(2021)
Single-dose effects of Citalopram on neural responses to affective stimuli in borderline personality disorder: a randomized clinical trial
Paret C, Niedtfeld I, Lotter T, Wunder A, Grimm S et al. (2021), Biological Psychiatry: Cognitive Neuroscience and Neuroimaging, 6(8), 837-845
BibTeX
@article{singledoseeffec-2021/2,
title={Single-dose effects of Citalopram on neural responses to affective stimuli in borderline personality disorder: a randomized clinical trial},
author={Paret C, Niedtfeld I, Lotter T, Wunder A, Grimm S et al.},
journal={Biological Psychiatry: Cognitive Neuroscience and Neuroimaging},
volume={6},
pages={837-845},
publisher={Elsevier},
year = "2021"
}
Medium-term effects of SARS-CoV-2 infection on multiple vital organs, exercise capacity, cognition, quality of life and mental health, post-hospital discharge
Raman B, Cassar MP, Tunnicliffe EM, Filippini N, Griffanti L et al. (2021), EClinicalMedicine, 31(January 2021)
BibTeX
@article{mediumtermeffec-2021/1,
title={Medium-term effects of SARS-CoV-2 infection on multiple vital organs, exercise capacity, cognition, quality of life and mental health, post-hospital discharge},
author={Raman B, Cassar MP, Tunnicliffe EM, Filippini N, Griffanti L et al.},
journal={EClinicalMedicine},
volume={31},
number={100683},
publisher={Elsevier},
year = "2021"
}
Improving PCASL at ultra-high field using a VERSE-guided parallel transmission strategy
Tong Y, Jezzard P, Okell TW & Clarke WT (2020), Magnetic Resonance in Medicine, 84(2), 777-786
Designing and comparing optimized pseudo-continuous Arterial Spin Labeling protocols for measurement of cerebral blood flow
Woods JG, Chappell MA & Okell TW (2020), NeuroImage, 223(December 2020)
BibTeX
@article{designingandcom-2020/8,
title={Designing and comparing optimized pseudo-continuous Arterial Spin Labeling protocols for measurement of cerebral blood flow},
author={Woods JG, Chappell MA & Okell TW},
journal={NeuroImage},
volume={223},
number={117246},
publisher={Elsevier},
year = "2020"
}
Calibration of arterial spin labeling data—potential pitfalls in post-processing
Pinto J, Chappell MA, Okell TW, Mezue M, Segerdahl AR et al. (2020), Magnetic Resonance in Medicine, 83(4), 1222-1234
Robust estimation of quantitative perfusion from multi-phase pseudo-continuous arterial spin labeling
Msayib Y, Craig M, Simard MA, Larkin JR, Shin DD et al. (2020), Magnetic Resonance in Medicine, 83(3), 815-829
BibTeX
@article{robustestimatio-2020/3,
title={Robust estimation of quantitative perfusion from multi-phase pseudo-continuous arterial spin labeling},
author={Msayib Y, Craig M, Simard MA, Larkin JR, Shin DD et al.},
journal={Magnetic Resonance in Medicine},
volume={83},
pages={815-829},
year = "2020"
}
A Frequency-Domain Machine Learning Method for Dual-Calibrated fMRI Mapping of Oxygen Extraction Fraction (OEF) and Cerebral Metabolic Rate of Oxygen Consumption (CMRO2)
Germuska M, Chandler HL, Okell T, Fasano F, Tomassini V et al. (2020), Frontiers in Artificial Intelligence, 3
BibTeX
@article{afrequencydomai-2020/3,
title={A Frequency-Domain Machine Learning Method for Dual-Calibrated fMRI Mapping of Oxygen Extraction Fraction (OEF) and Cerebral Metabolic Rate of Oxygen Consumption (CMRO2)},
author={Germuska M, Chandler HL, Okell T, Fasano F, Tomassini V et al.},
journal={Frontiers in Artificial Intelligence},
volume={3},
publisher={Frontiers Media SA},
year = "2020"
}
Highly accelerated vessel-selective arterial spin labeling angiography using sparsity and smoothness constraints
Schauman SS, Chiew M & Okell TW (2020), Magnetic Resonance in Medicine, 83(3), 892-905
Measurement of collateral perfusion in acute stroke: a vessel-encoded arterial spin labeling study
Okell TW, Harston GWJ, Chappell MA, Sheerin F, Kennedy J et al. (2019), Scientific Reports, 9(1)
The advantages of radial trajectories for vessel-selective dynamic angiography with arterial spin labeling
Berry ESK, Jezzard P & Okell TW (2019), Magnetic Resonance Materials in Physics, Biology and Medicine, 32(6), 643-653
BibTeX
@article{theadvantagesof-2019/12,
title={The advantages of radial trajectories for vessel-selective dynamic angiography with arterial spin labeling},
author={Berry ESK, Jezzard P & Okell TW},
journal={Magnetic Resonance Materials in Physics, Biology and Medicine},
volume={32},
pages={643-653},
year = "2019"
}
Partial volume correction for quantitative CEST imaging of acute ischemic stroke
Msayib Y, Harston GWJ, Sheerin F, Blockley NP, Okell TW et al. (2019), Magnetic Resonance in Medicine, 82(5), 1920-1928
ICA-based denoising for ASL perfusion imaging
Carone D, Harston GWJ, Garrard J, De Angeli F, Griffanti L et al. (2019), NeuroImage, 200, 363-372
Volume-localized measurement of oxygen extraction fraction in the brain using MRI
O'Brien C, Okell TW, Chiew M & Jezzard P (2019), Magnetic Resonance in Medicine, 82(4), 1412-1423
Off-resonance correction for pseudo-continuous arterial spin labeling using the optimized encoding scheme
Berry ESK, Jezzard P & Okell TW (2019), NeuroImage, 199, 304-312
Quantitative blood flow measurement in rat brain with multiphase arterial spin labelling magnetic resonance imaging
Larkin JR, Simard MA, Khrapitchev AA, Meakin JA, Okell TW et al. (2019), Journal of Cerebral Blood Flow and Metabolism, 39(8), 1557-1569
BibTeX
@article{quantitativeblo-2019/8,
title={Quantitative blood flow measurement in rat brain with multiphase arterial spin labelling magnetic resonance imaging},
author={Larkin JR, Simard MA, Khrapitchev AA, Meakin JA, Okell TW et al.},
journal={Journal of Cerebral Blood Flow and Metabolism},
volume={39},
pages={1557-1569},
year = "2019"
}
A methodology for generating four-dimensional arterial spin labeling MR angiography virtual phantoms
Phellan R, Lindner T, Helle M, Falcão AX, Okell TW et al. (2019), Medical Image Analysis, 56, 184-192