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- W2294889627 abstract "Hypercapnia has been utilized as a stimulus to elicit changes in cerebral blood flow (CBF). However, in many instances it has been delivered in a non-controlled method that is often difficult to reproduce. The purpose of this study was to examine the within- and between-visit reproducibility of blood oxygen level-dependent (BOLD) signal changes to an iso-oxic square wave alteration in end-tidal carbon dioxide partial pressure (Pet CO2 ). Two 3-Tesla (3T) MRI scans were performed on the same visit, with two square wave alterations administered per scan. The protocol was repeated on a separate visit with minimum of 3 days between scanning sessions. Pet CO2 was altered to stimulate changes in cerebral vascular reactivity (CVR), while Pet O2 was held constant. Eleven subjects (six females; mean age 26·5 ± 5·7 years) completed the full testing protocol. Excellent within-visit square wave reproducibility (ICC > 0·75) was observed. Similarly, square waves were reproducible between scanning sessions (ICC > 0·7). This study demonstrates BOLD signal changes in response to alterations in Pet CO2 are reproducible both within- and between-visit MRI scans." @default.
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- W2294889627 date "2016-03-02" @default.
- W2294889627 modified "2023-10-16" @default.
- W2294889627 title "Reproducibility of blood oxygen level-dependent signal changes with end-tidal carbon dioxide alterations" @default.
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- W2294889627 doi "https://doi.org/10.1111/cpf.12358" @default.
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