Patent ID: 6402373
Filing Date: 2002-06-11
Classification: G01D

Abstract:
A method for determining a separation distance between a radiation source and a digital detector, the radiation source having a collimator opening through which a radiation beam generated by the source is directed, the method comprising the steps of:detecting a first impact region on the digital detector of a first radiation beam generated by the radiation source while at a first source position; determining a first size of the first impact region; varying a size of the collimator opening; detecting a second impact region on the digital detector of a second radiation beam generated by the radiation source while at the first source position, the second radiation beam being directed through the varied size of the collimator opening such that the second impact region has a second size different than the first size; determining the second size; and determining a first separation distance between the radiation source and the digital detector based on the variation of the size of the collimator opening and the determined first and second sizes of the first and second impact regions.