The method includes acquiring the gray tone images, and plotting a histogram of {HEAD ~ the average pixel signal intensities} for {TAIL ~ selected regions} of interest in each image 
for
The method includes acquiring the gray tone images , and plotting a histogram of { HEAD ~ the average pixel signal intensities } for { TAIL ~ selected regions } of interest in each image
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH