Patent ID: 7656996
Filing Date: 2010-02-02
Classification: G01N

Abstract:
1. A device for mapping the distribution of an XRF marker ( 16 ) in a body volume ( 14 ), comprising an X-ray source ( 10 ) for the emission of a beam of rays ( 12 ), said beam comprising a first ray component (I 1 ) with a quantum energy above the K-edge of the XRF marker and a second ray component (I 2 ) ( 12 ) with a quantum energy below the K-edge of the marker, the quantum energy of the first ray component and the quantum energy of the second ray component deviating from the K-edge of the XRF marker by less than 10%; a detector ( 30 ) for the detection of secondary radiation from the body volume ( 14 ), said detector being located outside the beam of rays ( 12 ) of the X-ray source ( 10 ); means ( 22 ) for adjusting the intensity ratio between the first and second ray components in the beam of rays ( 12 ).