A collimator arrangement for varying the exposed surface of an x-ray detector in an x-ray imaging system includes an arrangement of two relatively displaceable parts having overlapping slots producing an adjustable slot width

摘要

In an x-ray imaging system, a variable exposure of a semiconductor, gas or sensitive film x-ray detector (43) to x-rays from a source is provided by a collimator (42). The collimator is arranged as two parts (42a, 42b) that are displaceable relative to each other, each having several identical slots in different planes that overlap. Relative displacement by a motor/actuator produces a variable width slot (45) that is adjustable between fully closed and open positions.