A certain region of interest (ROI) can be traced by the user and a histogram i.e., graph showing the distribution of the pixel values and frequency inside this area can be shown.  This shows the characteristics of a certain area in the images, and is especially helpful for CT or MRI images to measure let's say the characteristics of a tumor or mass.

These signals are relayed buying clomid online safe which then is by a number of such as medial preoptic and paraventricular nulcei.