A low point and {HEAD ~ an edge point} are identified from {TAIL ~ the histogram} and integral, and based on the type of radiographic examination selected, are used with appropriate constants and algorithms to calculate a maximum and minimum value 
A low point and { HEAD ~ an edge point } are identified from { TAIL ~ the histogram } and integral , and based on the type of radiographic examination selected , are used with appropriate constants and algorithms to calculate a maximum and minimum value
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH