Abstract
Performance of Automatic Exposure control in several digital mammography systems (both CR and DR) were evaluated. The test procedure applied was that proposed by the European Guidelines, which requires measurement of contrast-to-noise ratio (CNR) produced by 0.2 mm Al superimposed on variable polymethyl-methacrylate (PMMA) thicknesses. PMMA layers were exposed by full automatic techniques and average glandular dose (AGD) determined. Results demonstrated that AGD values keep below the acceptable limits for all CR and DR systems at almost all equivalent breast thicknesses. CNR absolute values per each thickness can significantly vary, depending on characteristics of each type of equipment. The application of limits suggested by the European Guidelines for CNR variation with reference to 50 mm PMMA causes systematic failure for equivalent breast thickness above 50 mm; this may be due to the contradiction between the principles followed by the manufacturers to designed the AEC (signal constancy) and those proposed by the European protocol (CNR constancy).
Keywords
- European Guideline
- Digital Mammography
- Compute Radiography
- Voltage Compensation
- Automatic Exposure Control
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References
Huda, W., Sajewicz, A.M., Ogden, K.M., Dance, D.R.: Experimental investigation of the dose and image quality characteristics of a digital mammography imaging system. Med. Phys. 30, 442–448 (2003)
Flynn, M., Dodge, C., Peck, D., Swinford, A.: Optimal radiographic techniques for digital mammograms obtained with an amorphous selenium detector. In: Yaffe, M.J., Antonuk, L.E. (eds.) Proceedings of SPIE Medical Imaging 2003: Physics of Medical Imaging, vol. 5030, pp. 147–156 (2003)
Klausz, R., Shramchenko, N.: Dose to population as a metric in the design of optimised exposure control in digital mammography. Rad. Prot. Dosim. 114, 369–374 (2005)
Young, K.C., Odoku, J.M., Bosmans, H., Nijs, K., Martinez, L.: Optimal beam quality selection in digital mammography. Br. J. Radiol. 79, 981–990 (2006)
Toroi, P., Zanca, F., Young, K.C., van Ongeval, C., Marchal, G., Bosmans, H.: Experimental investigation on the choice of the tungsten/rhodium filter anode/filter combination for an amorphous selenium-based digital mammography system. Eur. Radiol. (2006)
Kimme-Smith, C.: New digital mammography systems require different x-ray spectra and, therefore, more general normalized glandular dose values. Radiology 213, 7–10 (1999)
Dance, D.R., Thilander-Klang, A., Sandborg, M., Skinner, C.L., Castellano Smith, A., Carlsson, G.A.: Influence of anode/filter material and tube potential on contrast, signal-to-noise ratio and average absorbed dose in mammography: a Monte Carlo study. Br. J. Radiol. 73, 1056–1067 (2000)
van Engen, R., Young, K., Bosmans, H., Thijssen, M.: European protocol for the quality control of the physical aspects of mammography screening: Digital mammography. In: Perry, N., Broeders, M., de Wolf, C., Tornberg, S., Holland, R., von Karsa, L. (eds.) European guidelines for quality assurance in breast cancer screening and diagnosis, 4th edn., pp. 105–165. European Commission (2006)
Dance, D.R., Skinner, C.L., Young, K.C., Beckett, J.R., Kotre, C.J.: Additional factors for the estimation of mean glandular breast dose using UK mammography dosimetry protocol. Phys. Med. Biol. 45, 3225–3240 (2000)
Bernhardt, P., Mertelmeier, T., Hohaisel, M.: X-ray spectrum optimization of full-field digital mammography: simulation and phantom study. Med. Phys. 33, 4337–4349 (2006)
Yaffe, M.J., Bloomquist, A.K., Mawdsley, G.E., Pisano, E.D., Hendrick, R.E., Fajardo, L.L., Boone, J.M., Kanal, K., Mahesh, M., Fleischman, R.C., Och, J., Williams, M.B., Beideck, D.J., Maidment, A.D.A.: Quality control for digital mammography: part II recommendations from the ACRIN DMIST trial. Med. Phys. 33, 737–752 (2006)
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Gennaro, G. et al. (2008). Automatic Exposure Control in Digital Mammography: Contrast-to-Noise Ratio Versus Average Glandular Dose. In: Krupinski, E.A. (eds) Digital Mammography. IWDM 2008. Lecture Notes in Computer Science, vol 5116. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-70538-3_98
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DOI: https://doi.org/10.1007/978-3-540-70538-3_98
Publisher Name: Springer, Berlin, Heidelberg
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