CORRECTION OF EXPOSURE FACTOR BY USE OF PHOTOGRAPHIC DENSITY CHANGE

Abstract

In is troublesome to calculate the exposure factor for each equipment, in case when lots of X-ray equipment are used. We made a test piece, and obtained the difference of the X-ray output of each equipment from the deinsity of the test piece image. Using this output difference, the exposure factor of one piece of equipment can be calculated from the data obtained in the test equipment. Furthermore, if the X-ray output changes, the exposure factor can be easily corrected using this method. As a result of the dispersion analysis, this method was found to be satisfactorily reliable in general use.