Dual-energy imaging in full-field digital mammography: a phantom study |
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Authors: | Taibi A Fabbri S Baldelli P di Maggio C Gennaro G Marziani M Tuffanelli A Gambaccini M |
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Affiliation: | Dipartimento di Fisica, Università di Ferrara and INFN, Sezione di Ferrara, via Paradiso 12, 44100 Ferrara, Italy. taibi@fe.infn.it |
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Abstract: | A dual-energy technique which employs the basis decomposition method is being investigated for application to digital mammography. A three-component phantom, made up of plexiglas, polyethylene, and water, was doubly exposed with the full-field digital mammography system manufactured by General Electric. The 'low' and 'high' energy images were recorded with a Mo/Mo anode-filter combination and a Rh/Rh combination, respectively. The total dose was kept within the acceptable levels of conventional mammography. The first hybrid images obtained with the dual-energy algorithm are presented in comparison with a conventional radiograph of the phantom. Image-quality characteristics at contrast cancellation angles between plexiglas and water are discussed. Preliminary results show that a combination of a standard Mo-anode 28 kV radiograph with a Rh-anode 49 kV radiograph provides the best compromise between image-quality and dose in the hybrid image. |
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