Then regions of interest depicted in the image are determined using {HEAD ~ a detection scheme} adapted for {TAIL ~ the assigned image group} 
Then regions of interest depicted in the image are determined using { HEAD ~ a detection scheme } adapted for { TAIL ~ the assigned image group }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL