U.S. Philips Corporation

Otto E Scheltema

Leonardus A Verhoeven

Walter E Carels

The method and the device in accordance with the present invention utilizes a recursive filter for forming a composite image from a short series of X-ray images with the weighting factor .alpha. used in the filter being a function of the number of X-ray images processed and to be processed. When .alpha. is suitably chosen, the amplitude of the composite image is always constant, such as a constant image brightness, and each X-ray image makes an equally large contribution to the composite image. The noise level in the composite image decreases as the number of processed X-ray images is larger.

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Eindhoven, Netherlands

Otto E Scheltema