Phase contrast imaging: Effect of increased object-detector distances at X-ray diagnostic and megavoltage energies


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Loveland J., Gundogdu Ö. , Morton E., Wells K., Bradley D. A.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, cilt.652, ss.625-629, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 652 Konu: 1
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.nima.2010.09.092
  • Dergi Adı: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
  • Sayfa Sayıları: ss.625-629

Özet

The effect of varying object to detector separation at constant and varying magnification has been investigated at an accelerating potential of 30 kVp. Edge-contrast enhancement provided by phase effects was investigated for a drinking straw and found to provide up to 2.52 +/- 0.02 x the contrast for a PVC Heaviside step function. An optimum magnification of 1.5 x was found to apply for the microfocus X-ray tube setup used. Imaging at nominal megavoltage energies was investigated using a Rapiscan Systems Eagle M4500 series scanner. For a fixed source-detector separation, increased magnification improved edge contrast and spatial resolution. (C) 2010 Elsevier B.V. All rights reserved.