METHOD AND DEVICE FOR DETERMINING SOURCE-TO-IMAGE DISTANCE IN DIGITAL RADIOGRAPHIC IMAGING SYSTEM

摘要

PROBLEM TO BE SOLVED: To simply determine a radiation source-to-image distance(SID) with enhancing softness and the reliability of a system in the installation and correction of a digital radiographic imaging system. SOLUTION: The present technique involves measuring the radiation source- to-image distance utilizing the X-ray intensity and the inverse square relationship between the intensity and the distance. The present technique can be with a digital detector system using fixed timing, relying on the measuring capability of the digital detector to determine intensity or it can be implemented using a phototiming approach, using either a digital detector or a conventional ion chamber to measure total exposure.