Viagra-like drugs may play role in treating dementia

Viagra-like drugs may play role in treating dementia
Example of anatomical and cerebral blood flow (CBF) mapping, with tissue segmentation. A, Fluid-attenuated inversion recovery (FLAIR) image at full resolution. B, FLAIR image co-registered to the CBF map, with voxels re-sized to be equivalent to the pseudo-continuous arterial spin labeling (pCASL) map. C, CBF map, derived from pCASL. Calibration bar shows 0.0–80.0 mL/min/100 g. D, Tissue segmentation map for CBF computation. Each voxel has been defined as either: cerebrospinal fluid (CSF), gray matter (GM), normal-appearing white matter (WM), or white matter hyperintensity (WMH). E, F, Probability density functions of CBF values in voxels assigned as gray matter (E) or normal-appearing white matter (F). For this participant, median CBF was 51.3 mL/min/100 g in gray matter and 21.8 mL/min/100 g in…

Read more…