Patent ID: 7245698

Claim:
A 4-dimensional digital tomosynthesis system, comprising; an x-ray source for emitting x-ray beams to an object, the object having a periodic motion being divided into (n+1) time intervals, n being a positive integer, each of the (n+1) time intervals being associated with a time instance t i , i=0, 1, 2, . . . , n; an x-ray detector, coupled to the x-ray source, for acquiring projection radiographs of the object at each time instance t i , for each scan angle based on the x-ray beams; and a processor communicatively coupled to the x-ray source and the x-ray detector, the processor configured to control the x-ray source and process data received from the x-ray detector such that all projection radiographs acquired from all scan angles for each time instance t i through digital tomosynthesis are reconstructed and (n+1) sets of cross sections of the object are obtained, each of the (n+1) sets of cross sections being for a different time instance t i .