Average and standard deviation of OEF, CMRO2, v, R2, and χnb maps between QQ without and with CAT in cortical gray matter from healthy subjects (N=11). QQ with CAT shows smaller average CMRO2, OEF and v than the one without CAT, but QQ with CAT shows higher average R2 and χnb values. * p<0.01 (paired t-test).