+
+In some images,(where BitsAllocated=16, BitsUsed=8),
+the 'unused bits' are actually ... used for storing 'overlays'.
+(e.g. : Patient / Aquisition / Institution informations, or drawings ...)
+It's up to you to decide whether you want or not to load the overlays.
+(Probabely, if you want to post-process the images, you dont' want!)
+
+ fh->SetKeepOverlays(true); // default is : false
+