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. Author manuscript; available in PMC: 2015 Sep 1.
Published in final edited form as: Magn Reson Med. 2013 Oct 21;72(3):864–875. doi: 10.1002/mrm.24984

Table 1.

Parameters used in CBV model fitting

Parameter Description Value
HctMALE Microvascular hematocrit in males (%) 45%×85% (8,56)
HctFEMALE Microvascular hematocrit in females (%) 40%×85% (8,56)
CBLOOD Blood water proton density (mL water / mL blood) 0.95–0.22×Hct (42)
CCSF CSF water proton density (mL water / mL CSF) 1 (42)
CGM GM water proton density (mL water / mL GM) 0.89 (42)
Δx Susceptibility difference between oxygenated and deoxygenated blood (ppm) 0.2 (43)
CSF T2* CSF effective transverse relaxation time constant (ms) 1442 (66)
GM T2 GM transverse relaxation time constant (ms) 71.1 (40,49)
(OBV/CBV)REST Oxygenated blood volume fraction at rest (%) 21% (57,61)
YOBV OBV oxygenation fraction (%) 98% (89)
YDBV,REST DBV oxygenation fraction at rest (%) 68.78% (49,57,61,62)