Comparison of simultaneous arterial spin labeling MRI and 15O-H2O PET measurements of regional cerebral blood flow in rest and altered perfusion states
| Autor: | Mark B Vestergaard, Egill Rostrup, Ulrich Lindberg, Ian Law, Oriol Puig, Adam E. Hansen, Henrik Larsson, Claes Nøhr Ladefoged, Otto M. Henriksen, Flemming Andersen |
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| Rok vydání: | 2019 |
| Předmět: |
medicine.diagnostic_test
Arterial spin labeling Chemistry cerebral blood flow Spin labelling Magnetic resonance imaging perfusion 030218 nuclear medicine & medical imaging 03 medical and health sciences O-HO-PET PET/MRI 0302 clinical medicine Arterial Spin Labeling MRI Nuclear magnetic resonance Neurology Cerebral blood flow medicine Neurology (clinical) Cardiology and Cardiovascular Medicine Perfusion 030217 neurology & neurosurgery Rest (music) |
| Zdroj: | Puig, O, Henriksen, O M, Vestergaard, M B, Hansen, A E, Andersen, F L, Ladefoged, C N, Rostrup, E, Larsson, H B W, Lindberg, U & Law, I 2020, ' Comparison of simultaneous arterial spin labeling MRI and 15 O-H 2 O PET measurements of regional cerebral blood flow in rest and altered perfusion states ', Journal of Cerebral Blood Flow and Metabolism, vol. 40, no. 8, pp. 1621-1633 . https://doi.org/10.1177/0271678X19874643 |
| ISSN: | 1559-7016 0271-678X |
| Popis: | Arterial spin labelling (ASL) is a non-invasive magnetic resonance imaging (MRI) technique that may provide fully quantitative regional cerebral blood flow (rCBF) images. However, before its application in clinical routine, ASL needs to be validated against the clinical gold standard, 15O-H2O positron emission tomography (PET). We aimed to compare the two techniques by performing simultaneous quantitative ASL-MRI and 15O-H2O-PET examinations in a hybrid PET/MRI scanner. Duplicate rCBF measurements were performed in healthy young subjects ( n = 14) in rest, during hyperventilation, and after acetazolamide (post-ACZ), yielding 63 combined PET/MRI datasets in total. Average global CBF by ASL-MRI and 15O-H2O-PET was not significantly different in any state (40.0 ± 6.5 and 40.6 ± 4.1 mL/100 g/min, respectively in rest, 24.5 ± 5.1 and 23.4 ± 4.8 mL/100 g/min, respectively, during hyperventilation, and 59.1 ± 10.4 and 64.7 ± 10.0 mL/100 g/min, respectively, post-ACZ). Overall, strong correlation between the two methods was found across all states (slope = 1.01, R2 = 0.82), while the correlations within individual states and of reactivity measures were weaker, in particular in rest (R2 = 0.05, p = 0.03). Regional distribution was similar, although ASL yielded higher perfusion and absolute reactivity in highly vascularized areas. In conclusion, ASL-MRI and 15O-H2O-PET measurements of rCBF are highly correlated across different perfusion states, but with variable correlation within and between hemodynamic states, and systematic differences in regional distribution. |
| Databáze: | OpenAIRE |
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