ELEANOR COX ELEANOR.COX@NOTTINGHAM.AC.UK
Senior Research Fellow
Using MRI to study the alterations in liver blood flow, perfusion and oxygenation in response to physiological stress challenges: meal, hyperoxia and hypercapnia
Cox, Eleanor F.; Palaniyappan, Naveen; Aithal, Guruprasad P.; Guha, I. Neil; Francis, Susan T.
Authors
NAAVENTHAN PALANIYAPPAN Naaventhan.Palaniyappan@nottingham.ac.uk
Clinical Associate Professor in Hepatology
GURUPRASAD AITHAL Guru.Aithal@nottingham.ac.uk
Professor of Hepatology
NEIL GUHA neil.guha@nottingham.ac.uk
Professor of Hepatology
Professor SUSAN FRANCIS susan.francis@nottingham.ac.uk
Professor of Physics
Abstract
Background: Non-invasive assessment of dynamic changes in liver blood flow, perfusion and oxygenation using magnetic resonance imaging (MRI) may allow detection of subtle haemodynamic alterations in cirrhosis.
Purpose: To assess the feasibility of measuring dynamic liver blood flow, perfusion and T2* alterations in response to meal, hypercapnia and hyperoxia challenges.
Study Type: Prospective.
Subjects: 10 Healthy participants (HV) and 10 patients with compensated cirrhosis (CC).
Field Strength/Sequence: 3T. Phase contrast, Arterial Spin Labelling and T2* mapping.
Assessment: Dynamic changes in portal vein and hepatic artery blood flow (using phase contrast MRI), liver perfusion (using Arterial Spin Labelling) and blood oxygenation (T2* mapping) following a meal challenge (660 kcal), hyperoxia (Target PETO2 of 500mmHg) and hypercapnia (Target increase PETCO2 of ~6mmHg).
Statistical tests: Tests between baseline and each challenge were performed using a paired two-tailed t-test (parametric) or Wilcoxon-signed-ranks test (non-parametric). Repeatability and reproducibility were determined by the Coefficient of Variation (CoV).
Portal vein velocity increased following the meal (70±9%, p
Citation
Cox, E. F., Palaniyappan, N., Aithal, G. P., Guha, I. N., & Francis, S. T. (in press). Using MRI to study the alterations in liver blood flow, perfusion and oxygenation in response to physiological stress challenges: meal, hyperoxia and hypercapnia. Journal of Magnetic Resonance Imaging, ISSN 1053-1807
Journal Article Type | Article |
---|---|
Acceptance Date | Aug 29, 2018 |
Deposit Date | Sep 4, 2018 |
Publicly Available Date | Mar 29, 2024 |
Print ISSN | 1053-1807 |
Publisher | Wiley |
Peer Reviewed | Peer Reviewed |
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