Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/242615
Type: Artigo
Title: Experimental evaluation of the image quality and dose in digital mammography: Influence of x-ray spectrum
Author: Tomal, A.
Perez, A. M. M. M.
Silva, M. C.
Poletti, M. E.
Abstract: In this work, we studied experimentally the influence of x-ray spectrum on the contrast-to-noise ratio (CNR) and the average glandular dose (MDG) for two digital mammography systems: Senographe 2000D (GE Medical Systems) and Lorad Selenia (Hologic), with indirect and direct detector imaging technology, respectively. CNR and MGD were determined using PMMA phantoms simulating breasts with thicknesses of 4 cm and 6 cm. All available anode/filter combinations of the systems were evaluated for a wide range of tube voltages values. Results indicated that the Rh/Rh combination provides the highest image quality with the lower mean glandular dose for the Senographe 2000D system. For the Lorad Selenia system, the W/Ag combination at 30 kV showed the best performance, in terms of dose saving and image quality improvement in relation to all tube voltage range. The comparison between the optimal x-ray spectra and those selected by the AEC mode showed that this automatic selection mechanism could be readjusted to optimize the relationship between image quality and dose. (C) 2015 Elsevier Ltd. All rights reserved.
In this work, we studied experimentally the influence of x-ray spectrum on the contrast-to-noise ratio (CNR) and the average glandular dose (MDG) for two digital mammography systems: Senographe 2000D (GE Medical Systems) and Lorad Selenia (Hologic), with indirect and direct detector imaging technology, respectively. CNR and MGD were determined using PMMA phantoms simulating breasts with thicknesses of 4 cm and 6 cm. All available anode/filter combinations of the systems were evaluated for a wide range of tube voltages values. Results indicated that the Rh/Rh combination provides the highest image quality with the lower mean glandular dose for the Senographe 2000D system. For the Lorad Selenia system, the W/Ag combination at 30 kV showed the best performance, in terms of dose saving and image quality improvement in relation to all tube voltage range. The comparison between the optimal x-ray spectra and those selected by the AEC mode showed that this automatic selection mechanism could be readjusted to optimize the relationship between image quality and dose.
Subject: Mamas - Radiografia
Espectroscopia de raio X
Diagnóstico por imagem
Country: Inglaterra
Editor: Elsevier
Citation: Experimental Evaluation Of The Image Quality And Dose In Digital Mammography: Influence Of X-ray Spectrum. Pergamon-elsevier Science Ltd, v. 116, p. 282-286 NOV-2015.
Rights: fechado
Identifier DOI: 10.1016/j.radphyschem.2015.04.019
Address: https://www.sciencedirect.com/science/article/pii/S0969806X15001577
Date Issue: 2015
Appears in Collections:IFGW - Artigos e Outros Documentos

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