… evaluate the contribution ratio of the partial mean pathlength of cerebral tissue to the … ,
then, we could estimate the contribution ratio of the cerebral tissue to optical signals at the …

… in arterial/venous ratios and that the ratio does not change … calculation of the cerebral
arterial/venous ratio. Biologic factors … tissue is minimal, 24with the result that our calculation of the …

… oxygenation index (TOI, %) which reflects mixed cerebral arterial and venous oxygenations.
… cerebral arterial to venous volume ratio [A:V ratio]) in the newborn lamb brain using cerebral …

… While we showed evidence of the non-structural contribution to the short-term sMRI-derived
apparent tissue changes, our data can not be over-explained to exclude the existence of …

… Thus, cerebral NIRS oximetry responded poorly to changes in tissue oxygenation during
hypotension induced by decreased preload. An increase in the AV-ratio during hypotension …

… , although optical signal from cerebral tissue could be caught … contribution ratios of
intracerebral tissue to observed absorption change based on diffusion theory. The contribution ratios …

… To quantify the effect of absorption changes in the deep tissue (cerebral) and shallow tissue
(scalp, skin) layers on functional near-infrared spectroscopy (fNIRS) signals, a method using …

… contribution to rcStO2 is commonly rounded to the 25:75 ratio, the largest in vivo study
conducted in neonates and young children showed an average, relatively constant ratio … A:V ratio …

… Conclusions: These results indicate that tissue factor-mediated events may also contribute
to no-reflow in noncapillary microvessels after focal cerebral ischemia. (Stroke 1993;24:847-…

… brain tissue … contribution from the anterior cerebral artery with crossflow through the anterior
communicating artery has already been shown to influence the chances of severe cerebral …