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Cantrell CG, Nguyen V, Vakil P, Jeong Y, Menon R, Ansari SA, Kawaji K, Carroll TJ. Transient susceptibility imaging as a measure of hemodynamic compromise: A pilot study. Magn Reson Imaging 2023; 104:105-114. [PMID: 37820979 DOI: 10.1016/j.mri.2023.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 08/11/2023] [Accepted: 10/07/2023] [Indexed: 10/13/2023]
Abstract
BACKGROUND AND PURPOSE The purpose of this study was to test the hypothesis that hemodynamically compromised brains exhibit transient changes in magnetic susceptibility throughout the cardiac cycle, and to model these changes using Linear System Theory to extract an index that reflects cerebrovascular reserve. MATERIALS AND METHODS Eleven patients with angiographically-confirmed intracranial atherosclerotic disease with >50% stenosis were imaged with susceptibility weighted, cardiac-gated single shot images of cerebral Oxygen Extraction Fraction (OEF) at different timepoints of the cardiac cycle. Cardiac gating of the OEF acquisition allowed interrogation of oxygenated blood and the detection of changes throughout the cardiac cycle. Independent component analysis (ICA) of raw k-space data across the cardiac phase allowed MRI signal decomposition into dynamic and static components for image reconstruction. An asymmetry index score of the resultant parametric images were compared to test the hypothesis that variation in hemoglobin-induced susceptibility across the cardiac cycle indeed reflects pathophysiology of cerebrovascular disease. A mathematical model was derived to parameterize physiologic changes induced by the presence of a hemodynamically significant stenosis in the brain as a tissue impulse response parameter (β). RESULTS OEF was elevated in the affected hemisphere (50.34 ± 12.13% vs 46.93 ± 12.34%), but failed to reach statistical significance (p < .0796). Transient changes in the OEF signal showed significant distinction between healthy and compromised tissue (0.56 ± 0.067 vs 0.44 ± 0.067, p < .019)). The derived tissue impulse response function was found to be significant as well (10.72 ± 3.48 10-3 ms-1, 9.69 ± 3.51 10-3 ms-1; p < .037). CONCLUSION In this pilot study, we found transient OEF and β to be significant predictors of hemispheric compromise.
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Affiliation(s)
- Charles G Cantrell
- University of Chicago, Department of Radiology, Billings Hospital, P220 5841 South Maryland Avenue, MC2026, Chicago, IL 60637, USA
| | - Vivian Nguyen
- University of Chicago, Department of Radiology, Billings Hospital, P220 5841 South Maryland Avenue, MC2026, Chicago, IL 60637, USA; Illinois Institute of Technology, Department of Biomedical Engineering, Wishnick Hall 3255 South Dearborn Street, Suite 314, Chicago, IL 60616, USA
| | - Parmede Vakil
- University of Illinois, College of Medicine, 1853 W Polk St, Chicago, IL 60612, USA; Northwestern University, Department of Radiology, 676 N. St. Clair St. Suite 800, Chicago, IL 60611, USA
| | - Yong Jeong
- McCormick School of Engineering, Northwestern University, Technological Institute, 2145 Sheridan Road, E310, Evanston, IL 60208, USA
| | - Rajiv Menon
- New York University, Langone Medical Center, 424 E 34th St., New York, NY 10016, USA
| | - Sameer Ahmad Ansari
- Northwestern University, Department of Radiology, 676 N. St. Clair St. Suite 800, Chicago, IL 60611, USA; Northwestern University, Departments of Neurology and Neurological Surgery, 676 North St. Clair Street Suite 2210, Chicago, IL 60611, USA
| | - Keigo Kawaji
- University of Chicago, Department of Radiology, Billings Hospital, P220 5841 South Maryland Avenue, MC2026, Chicago, IL 60637, USA; Illinois Institute of Technology, Department of Biomedical Engineering, Wishnick Hall 3255 South Dearborn Street, Suite 314, Chicago, IL 60616, USA
| | - Timothy J Carroll
- University of Chicago, Department of Radiology, Billings Hospital, P220 5841 South Maryland Avenue, MC2026, Chicago, IL 60637, USA.
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Kudo K, Liu T, Murakami T, Goodwin J, Uwano I, Yamashita F, Higuchi S, Wang Y, Ogasawara K, Ogawa A, Sasaki M. Oxygen extraction fraction measurement using quantitative susceptibility mapping: Comparison with positron emission tomography. J Cereb Blood Flow Metab 2016; 36:1424-33. [PMID: 26661168 PMCID: PMC4976745 DOI: 10.1177/0271678x15606713] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 08/03/2015] [Indexed: 11/15/2022]
Abstract
The purposes of this study are to establish oxygen extraction fraction (OEF) measurements using quantitative susceptibility mapping (QSM) of magnetic resonance imaging (MRI), and to compare QSM-OEF data with the gold standard (15)O positron emission tomography (PET). Twenty-six patients with chronic unilateral internal carotid artery or middle cerebral artery stenosis or occlusion, and 15 normal subjects were included. MRI scans were conducted using a 3.0 Tesla scanner with a three-dimensional spoiled gradient recalled sequence. QSM images were created using the morphology-enabled dipole inversion method, and OEF maps were generated from QSM images using extraction of venous susceptibility induced by deoxygenated hemoglobin. Significant correlation of relative OEF ratio to contra-lateral hemisphere between QSM-OEF and PET-OEF was observed (r = 0.62, p < 0.001). The local (intra-section) correlation was also significant (r = 0.52, p < 0.001) in patients with increased PET-OEF. The sensitivity and specificity of OEF increase in QSM was 0.63 (5/8) and 0.89 (16/18), respectively, in comparison with PET. In conclusion, good correlation was achieved between QSM-OEF and PET-OEF in the identification of elevated OEF in affected hemispheres of patients with unilateral chronic steno-occlusive disease.
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Affiliation(s)
- Kohsuke Kudo
- Division of Ultra-High Field MRI, Iwate Medical University, Japan Department of Diagnostic and Interventional Radiology, Hokkaido University Hospital, Japan
| | - Tian Liu
- Departments of Radiology, Weill Cornell Medical College, New York, NY, USA MedImageMetric LLC, New York, NY, USA
| | | | - Jonathan Goodwin
- Division of Ultra-High Field MRI, Iwate Medical University, Japan
| | - Ikuko Uwano
- Division of Ultra-High Field MRI, Iwate Medical University, Japan
| | - Fumio Yamashita
- Division of Ultra-High Field MRI, Iwate Medical University, Japan
| | - Satomi Higuchi
- Division of Ultra-High Field MRI, Iwate Medical University, Japan
| | - Yi Wang
- Departments of Radiology, Weill Cornell Medical College, New York, NY, USA
| | | | - Akira Ogawa
- Department of Neurosurgery, Iwate Medical University, Japan
| | - Makoto Sasaki
- Division of Ultra-High Field MRI, Iwate Medical University, Japan
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Determination of oxygen extraction fraction using magnetic resonance imaging in canine models with internal carotid artery occlusion. Sci Rep 2016; 6:30332. [PMID: 27443195 PMCID: PMC4957224 DOI: 10.1038/srep30332] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 07/04/2016] [Indexed: 01/13/2023] Open
Abstract
Perfusion of the penumbra tissue below the flow threshold for functional disturbance but above that for the maintenance of morphological integrity is the target for therapy in acute ischaemic stroke. The measurement of the oxygen extraction fraction (OEF) may provide a direct assessment of tissue viability, so that irreversible tissue damage and penumbra can be reliably identified. By using an asymmetric spin echo single-shot echo planar imaging (ASE-SSEPI) sequence, the quantitative OEF was obtained in the ischaemic brain tissues of canine models with internal carotid artery occlusion. TTC staining, which delineated the regions of infarct and penumbra, was used for defining the corresponding regions on OEF maps. The threshold of the OEF to discriminate the infarct cores and penumbral tissues was then determined according to the OEF values at different times. With repeated-measures ANOVA, the OEF of the infarcted regions was found to be time dependent. An OEF greater than 0.48 best predicted cortical infarction at 1.5 hr, with an area under the receiving operating characteristic curve of 0.968, a sensitivity of 97.5%, and a specificity of 92.5%. Our results may be helpful in the evaluation of tissue viability during stroke events.
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