Differential x-ray method and apparatus

Details Differential x-ray method and apparatus Differential x-ray method and apparatus

H - Electricity

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358/11.2

H05G 1/08 (2006.01) A61B 6/03 (2006.01) G06T 5/50 (2006.01) H04N 5/32 (2006.01) H05G 1/64 (2006.01)

Patent

CA 1045254

DIFFERENTIAL X-RAY METHOD AND APPARATUS ABSTRACT: Differential X-ray images are produced in order to improve the visibility of a contrast medium, such as iodine or xenon, having a K absorption edge at a predetermined X-ray energy. Such differential images are produced by combining first, second and third X-ray images which are individually produced by using first, second and third X-ray spectra at first, second and third X-ray energy levels. The first energy level is below the K edge energy, while the second energy level is above the K edge energy. The third energy level is above the second energy level. The second X-ray image is combined subtractively with the average of the first and third X-ray images to produce a differential X-ray image in which any image elements due to soft tissue and bone are largely cancelled out, while image elements due to the contrast medium are enhanced. - i -

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