This work proposes a compact dichromatic imaging system for the application of the K-edge digital subtraction technique based on a conventional x-ray tube and a monochromator system. A quasi-monochromatic x-ray beam at the energy of iodine K-edge is produced by Bragg diffraction on a mosaic crystal. Two thin adjacent beams with energies that bracket the K-edge discontinuity are obtained from the diffracted beam by means of a proper collimation system. They are then detected using an array of Si detectors. A home-made phantom is used to study the image quality as a function of iodine concentration. Signal and signal-to-noise ratio analysis has also been performed. The results are compared with theoretical expectations.

K-edge digital subtraction imaging based on a dichromatic and compact x-ray source

TAIBI, Angelo;GAMBACCINI, Mauro
2004

Abstract

This work proposes a compact dichromatic imaging system for the application of the K-edge digital subtraction technique based on a conventional x-ray tube and a monochromator system. A quasi-monochromatic x-ray beam at the energy of iodine K-edge is produced by Bragg diffraction on a mosaic crystal. Two thin adjacent beams with energies that bracket the K-edge discontinuity are obtained from the diffracted beam by means of a proper collimation system. They are then detected using an array of Si detectors. A home-made phantom is used to study the image quality as a function of iodine concentration. Signal and signal-to-noise ratio analysis has also been performed. The results are compared with theoretical expectations.
Sarnelli, A.; Taibi, Angelo; Tuffanelli, A.; Baldazzi, G.; Bollini, D.; CABAL RODRIGUEZ, A. E.; Gombia, M.; Prino, F.; Ramello, L; Tomassi, E; Gambaccini, Mauro
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1203328
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