An X-ray assembly may include a housing, an anode, and a cathode assembly. The anode may be located at least partially within the housing. The anode may include a target area configured such that X-rays generated at the target area form an area-source X-ray beam. The cathode assembly may be located at least partially within the housing and may be positioned to deliver electrons to the target area of the anode from multiple directions relative to the target area, the multiple directions including at least two substantially opposite directions relative to the target area.
