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Fig. 4 69-year-old woman with cerebral B-cell lymphoma. On
T1-weighted images (top row), gadolinium (Gd) series shows enhancing
tumor in fornix and in ependyma at level of left foramen of Monroe. On
T1-weighted ultrasmall superparamagnetic iron oxides (USPIO) image, reduced
enhancement is present (arrowhead). No enhancement appears on
T2*-weighted USPIO images (bottom row). Note improved
delineation of sulcal veins, choroid plexus in occipital horns of lateral
ventricles, and internal cerebral vein in third ventricle on USPIO-enhanced
T2*-weighted images (bottom right).