Patent ID: 7943907
Filing Date: 2011-05-17
Classification: G01T

Abstract:
1. A method for determining radiation intensity using a detector having counting detector elements, comprising: generating, via radiation photons which are either absorbed or absorbed in part in the detector elements, pulse-shaped electrical signals, a number and height of the generated pulse-shaped electrical signals being correlated to a radiation intensity incident on the detector elements; and determining radiation intensity by counting the number of generated pulse-shaped electrical signals, generated pulse-shaped electrical signals incident on at least one detector element being detected simultaneously by at least one continuously operating pulse height discriminator and by at least one pulse height discriminator operating in a clocked fashion, and the number of incident generated pulse-shaped electrical signals being determined using detection information from the at least one continuously operating pulse height discriminator and the at least one pulse height discriminator operating in a clocked fashion, wherein a logical operation between the output of the at least one continuously operating pulse height discriminator and the output of the at least one pulse height discriminator operating in a clocked fashion is used such that after every time the at least one continuously operating pulse height discriminator exceeds a threshold representing a positive count event for the at least one continuously operating pulse height discriminator, and wherein a first count event is not counted in the at least one pulse height discriminator operating in a clocked fashion, whereas all other count signals of both the at least one continuously operating pulse height discriminator and the at least one pulse height discriminator operating in a clocked fashion are counted.