Abstract
The use of X-ray image receptors that produce a digital image is becoming increasingly important. Possible benefits include improved dynamic range and detective quantum efficiency, improved detectability for objects of low intrinsic contrast, and reduced radiation dose. The image can be available quickly. The display is separated from the image capture so that processing and contrast adjustment are possible before the image is viewed. The availability of a digital image means ready input into PACS and opens up the possibility of computer-aided detection and classification of abnormality. Possible drawbacks of digital systems include high cost, limited high contrast resolution and the fact that their clinical value is sometimes not proven in comparison with conventional, analogue techniques. The high contrast resolution attainable with such systems is discussed and the problem of sampling limitations and aliasing considered. The properties and limitations of digital systems using computed radiography, caesium iodide plus CCDs and active matrix arrays with either caesium iodide or selenium detectors are demonstrated. Examples are given of digital systems for mammography and general radiography and their performance is demonstrated in terms of clinical assessment and measurements of the modulation transfer function and detective quantum efficiency.
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References
Dobbins, J.T., 1995, Effects of under-sampling on the proper interpretation of modulation transfer function, noise power spectra and noise equivalent quanta of digital imaging systems, Med. Phys. 22 171-181
Maidment, A.D.A., Fahrig, R., and Yaffe, M.J., 1993, Dynamic range requirements in digital mammography, Med. Phys. 20 1621-1633
Cunningham, I.A., Westmore, M.S., and Fenster, A., 1994, A spatial-frequency dependent quantum accounting diagram and detective quantum efficiency model of signal and noise propagation in cascaded imaging systems, Med. Phys. 21 417-427
Rowlands, J.A., 2002, The physics of computed radiography, Phys. Med. Biol. 47 R123-R166
Yaffe, M.J. and Rowlands, J.A., 1997, X-ray detectors for digital radiography, Phys. Med. Biol. 42 1-39
Hejazi, S. and Trauernicht, D.P, 1996, Potential image quality in scintillator CCD-based sys- tems for digital radiography and digital mammography, SPIE 2708 440-449
Tesic, M.M., Fisher Piccaro, M., and Munder, B., 1999, Full field digital mammography scan- ner. Eur. J. Radiol. 31 2-17
Pisano, E.D., Gatsonis, C., Hendrick, E., et al., 2005, Diagnostic performance of digital versus film mammography for breast-cancer screening, NEJM 353 1773-1783
Samei, E. and Flynn, M.J., 2002, An experimental comparison of detector performance for computed radiography systems, Med. Phys. 29 447-459
Samei, E. and Flynn, M.J., 2003, An experimental comparison of detector performance for direct and indirect digital radiography systems, Med. Phys. 30 608-622
Kengyelics, S.M., Cowen, A.R., and Davies, A.G., 1999, Image quality evaluation of a direct digital radiography system in a UK radiology department, SPIE 3659 124-135
Muller, S., 1999, Full-field digital mammography designed as a complete system, Eur. J. Radiol. 31 25-34
Siebert, J.A., Filipow, L.J., and Andriole, K.R., (Eds) 1999, Practical Digital Imaging and PACS. AAPM monograph no 25. Medical Physics Publishing, Madison, WI
Vedantham, S., Karallas, A., Suryanarayanan, S., et al., 2000, Full breast digital mammography with an amorphous silicon-based flat panel detector: physical characteristics for a clinical prototype, Med. Phys. 27 558-567
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Dance, D.R. (2008). Digital X-Ray Imaging. In: Lemoigne, Y., Caner, A. (eds) Molecular Imaging: Computer Reconstruction and Practice. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-8752-3_2
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DOI: https://doi.org/10.1007/978-1-4020-8752-3_2
Publisher Name: Springer, Dordrecht
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