Description  Claims  Drawing  Cited references 

US8172633B   [0005] 
US20110003109   [0005] 
US7505562B   [0005] 
US2010091939A1   [0005] 
WO2014116665A2   [0006] 
US62135289   [0013] 
US2014012493W   [0014] 
US05449316   [0014] 

Carbon Nanotube Electron Emitter for X-ray Imaging   [0005] 
Fixed gantry tomosynthesis system for radiation therapy image guidance based on a multiple source x-ray tube with carbon nanotube cathodes   [0005]