The disclosure also pertains to apparatus, such as {HEAD ~ X ray exposure apparatus}, that include {TAIL ~ one or more X ray generating devices} 
The disclosure also pertains to apparatus , such as { HEAD ~ X ray exposure apparatus } , that include { TAIL ~ one or more X ray generating devices }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL