… The hemodynamically driven changes in tissue and blood oxygenation underlying the BOLD
signal … about cerebral hemodynamics that may be of interest, including CVR mechanisms. …

… Gas challenge studies differ from fMRI in that the ‘stimulus’ is slower because of the time
taken for the blood gas … of SMS acquisition in gas challenge experiments by comparing data …

… of a new CVR mapping approach that does not require gas inhalation. This approach … the
“resting CVR map” with the conventional CVR map obtained by hypercapnic gas inhalation in …

… as a physiological challenge while monitoring changes in hemodynamic MRI signals. CO2
… mapping, including gas delivery apparatus, the timing paradigm of the breathing challenge, …

… aid of a vasoactive gas challenge stimuli. To achieve this aim, we used a series of hypercapnic
and hypoxic gas challenges to induce maximal hemodynamic responses so as navigate …

… FC maps obtained with our technique were compared with conventional resting-state fMRI
scans. We hypothesized that the hemodynamic maps … single-gas challenges was randomized …

… challenge (eg inhalation of CO 2 ) has been used in calibrated fMRI as well as in the
mapping … is that CO 2 is a pure vascular challenge but does not alter neural activity. However, …

… analysis method to characterize hemodynamic delays in the … -vasoactive hyperoxic gas
challenges. Longer hypercapnic … TTP map can be used to compare the hemodynamic latency, …

… gas delivery systems can be found in the previous publication. The initiations of the gas
challenge … on the rAT map and convolving it with a set of candidate hemodynamic response …

… wave called the hemodynamic response function (HDRF) (C) … maps from each cycle of
the gas challenge to the map … maps from each of the individual cycles of the gas challenge (…