{TAIL ~ The lead} provides for efficient attenuation of x rays, and the high percentage of open area provides for unrestricted passage of {HEAD ~ the desired imaging x rays} 
{ TAIL ~ The lead } provides for efficient attenuation of x rays , and the high percentage of open area provides for unrestricted passage of { HEAD ~ the desired imaging x rays }
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD