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Calculation of OTF, NPS, and DQE for Oblique X-Ray Incidence on Turbid Granular Phosphors

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Digital Mammography (IWDM 2010)

Part of the book series: Lecture Notes in Computer Science ((LNIP,volume 6136))

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Abstract

Digital breast tomosynthesis (DBT) is an imaging modality in which tomographic sections of the breast are generated from a limited range of x-ray tube angles. One drawback of DBT is resolution loss in the oblique projection images. The purpose of this work is to extend Swank’s formulation of the transfer functions of turbid granular phosphors to oblique x-ray incidence, using the diffusion approximation to the Boltzmann equation to model the spread of light in the phosphor. As expected, the modulation transfer function (MTF) and noise power spectra (NPS) are found to decrease with projection angle regardless of frequency. By contrast, the dependence of detective quantum efficiency (DQE) on projection angle is frequency dependent. DQE increases with projection angle at low frequencies, and only decreases with projection angle at high frequencies. Importantly, the x-ray quantum detection efficiency (A Q) and the Swank information factor (A S) are also found to be angularly dependent.

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References

  1. Rafferty, E.: Tomosynthesis: New Weapon in Breast Cancer Fight. Imaging Economics 17(4) (2004)

    Google Scholar 

  2. Mainprize, J.G., Bloomquist, A.K., Kempston, M.P., Yaffe, M.J.: Resolution at oblique incidence angles of a flat panel imager for breast tomosynthesis. Med. Phys. 33(9), 3159–3164 (2006)

    Article  Google Scholar 

  3. Hajdok, G., Cunningham, I.A.: Penalty on the detective quantum efficiency from off-axis incident x rays. In: Yaffe, M.J., Flynn, M.J. (eds.) Proc. of SPIE, Medical Imaging 2004: Physics of Medical Imaging, vol. 5368, pp. 109–118. SPIE, Bellingham (2004)

    Google Scholar 

  4. Swank, R.K.: Calculation of Modulation Transfer Functions of X-Ray Fluorescent Screens. Appl. Opt. 12(8), 1865–1870 (1973)

    Article  Google Scholar 

  5. Marshak, R.E., Brooks, H., Hurwitz Jr., H.: Introduction to the Theory of Diffusion and Slowing Down of Neutrons – I. Nucleonics 4, 10–22 (1949)

    Google Scholar 

  6. Nishikawa, R.M., Yaffe, M.J.: Model of the spatial-frequency-dependent detective quantum efficiency of phosphor screens. Med. Phys. 17(5), 894–904 (1990)

    Article  Google Scholar 

  7. Nishikawa, R.M., Yaffe, M.J.: Effect of various noise sources on the detective quantum efficiency of phosphor screens. Med. Phys. 17(5), 887–893 (1990)

    Article  Google Scholar 

  8. Swank, R.K.: Absorption and noise in x-ray phosphors. J. Appl. Phys. 44(9), 4199–4203 (1973)

    Article  Google Scholar 

  9. Badano, A., Kyprianou, I.S., Sempau, J.: Anisotropic imaging performance in indirect x-ray imaging detectors. Med. Phys. 33(8), 2698–2713 (2006)

    Article  Google Scholar 

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Acciavatti, R.J., Maidment, A.D.A. (2010). Calculation of OTF, NPS, and DQE for Oblique X-Ray Incidence on Turbid Granular Phosphors. In: Martí, J., Oliver, A., Freixenet, J., Martí, R. (eds) Digital Mammography. IWDM 2010. Lecture Notes in Computer Science, vol 6136. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-13666-5_59

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  • DOI: https://doi.org/10.1007/978-3-642-13666-5_59

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-13665-8

  • Online ISBN: 978-3-642-13666-5

  • eBook Packages: Computer ScienceComputer Science (R0)

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