FIG 6. Quantitation of SE T1-weighted MR images. Normalized mean SE T1 signal intensity values with standard mean error in areas of absent, minimal, and maximal ferumoxtran enhancement in the tumor as well as in brain around tumor (BAT) (n = 15 patients). a indicates P < .05 for gadolinium (Gd) enhancement compared with precontrast images; b, P < .05 for gadolinium enhancement compared with ferumoxtran (Combidex) enhancement; c, P < .001 compared with precontrast image; d, P < .005 compared with precontrast images.