Streamlined quantitative BOLD for detecting visual stimulus-induced changes in oxygen extraction fraction in healthy participants: toward clinical application in human glioma

作者：Fatemeh Arzanforoosh, Avery Berman, Marion Smits, Esther A. H. Warnert · 发表于：Magnetic Resonance Materials in Physics Biology and Medicine · 年份：2023 · DOI：10.1007/s10334-023-01110-1 · 被引用次数：4 · 研究领域：Advanced MRI Techniques and Applications、Glioma Diagnosis and Treatment、Cancer, Hypoxia, and Metabolism

Abstract Objective Monitoring brain oxygenation is critical in brain tumors, as low oxygenation influences tumor growth, pathological angiogenesis, and treatment resistance. This study examined the ability of the streamlined quantitative (sq)BOLD MRI technique to detect oxygenation changes in healthy individuals, as well as its potential application in a clinical setting. Methods We used the asymmetric spin echo (ASE) technique with FLAIR preparation, along with model-based Bayesian inference to quantify the reversible transverse relaxation rate ( R 2 ' ) and oxygen extraction fraction (OEF) across the brain at baseline and during visual stimulation in eight healthy participants at 3T; and two patients with glioma at rest only. Results Comparing sqBOLD-derived parameters between baseline and visual stimulation revealed a decrease in OEF from 0.56 ± 0.09 at baseline to 0.54 ± 0.07 at the activated state ( p = 0.04, paired t test) within a functional localizer-defined volume of interest, and a decline in R 2 ' from 6.5 ± 1.3s −1 at baseline to 6.2 ± 1.4s −1 at the activated state ( p = 0.006, paired t test) in the visual cortex. Conclusion The sqBOLD technique is sensitive enough to detect and quantify changes in oxygenation in the healthy brain and shows potential for integration into clinical settings to provide valuable information on oxygenation in glioma.