The hand-labeling was done by Dr. Michael Goldbaum.
The following convention is followed for the labeling:
A blood vessel is labeled as,
1.   ' A '    if the vessel is artery.
2.   ' V '    if the vessel is vein.
3.   ' ??'    if  the labeling was questionable.
The following ten images are presented. To view the hand-labeled image click on the image name.
 im0001
 im0002
 im0003
 im0004
 im0005
 im0044
 im0077
 im0081
 im0082
 im0139