Patent ID: 6873682
Filing Date: 2005-03-29
Classification: A61B

Abstract:
1. A scanning-based radiation detector apparatus for recording a two dimensional image of an object comprising a plurality of one-dimensional detector units, each exposed to ionizing radiation, as transmitted through or scattered off said object, and being arranged for one-dimensional imaging of the respective ionizing radiation, to which it is exposed, wherein said plurality of one-dimensional detector units are distributed in an array such that the one-dimensional images of the ionizing radiation from said plurality of one-dimensional detector units are distributed over a substantial portion of said two-dimensional image of an object to be recorded; and said scanning-based detector apparatus further includes: a device for moving said array of one-dimensional detector units relative said object while the plurality of one-dimensional detector units are arranged to repeatedly detect to thereby create a two-dimensional image of the object; and a control device for controlling the movement of and the repeated detections by said array of one-dimensional detector units, said control device being adapted to control said array of one-dimensional detector units to detect ionizing radiation during a short period of time before or during an initial part of the movement, to calculate an optimum exposure time for each one of the repeated detections based on said detection of ionizing radiation before or during an initial part of the movement and said short period of time, and to control the repeated detections by said array of one-dimensional detector units to automatically obtain said optimum exposure time for each one of the repeated detections to thereby achieve optimum image quality.