Focal Spot Measurements For Quality Control Purposes Using A Random Object Distribution

J. E. Gray; M. Trefler

doi:10.1117/12.954587

25 March 1976 Focal Spot Measurements For Quality Control Purposes Using A Random Object Distribution

J. E. Gray, M. Trefler

Proceedings Volume 0070, Application of Optical Instrumentation in Medicine IV; (1976) https://doi.org/10.1117/12.954587
Event: Application of Optical Instrumentation in Medicine, IV, 1975, Atlanta, United States

Abstract

The use of a random object distribution for the characterization of x-ray focal spots for quality control purposes is described. This technique, utilizing a coherent optical processor, allows for the direct generation of the two dimensional modulation transfer function (MTF). The distance between the first zeroes of the MTF, in the orientation of interest, are then measured to provide an estimation of the x-ray focal spot size. This technique is compared to the conventional pinhole image measurement technique and the failure of resolution (star measurement) technique and is found to produce similar variability and sensitivity to changes in the focal spot size.

Citation Download Citation

J. E. Gray and M. Trefler "Focal Spot Measurements For Quality Control Purposes Using A Random Object Distribution", Proc. SPIE 0070, Application of Optical Instrumentation in Medicine IV, (25 March 1976); https://doi.org/10.1117/12.954587

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