SETT OCH ANORDNING FOR BEHANDLING AV RONTGENSTRALBILDER

摘要

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.