Performance of a small-field digital detector for soft x-ray imaging

Allen Seifert; Michael J. Flynn; Manjul Shah; Vivek V. Nagarkar

doi:10.1117/12.430947

28 June 2001 Performance of a small-field digital detector for soft x-ray imaging

Allen Seifert, Michael J. Flynn, Manjul Shah, Vivek V. Nagarkar

Proceedings Volume 4320, Medical Imaging 2001: Physics of Medical Imaging; (2001) https://doi.org/10.1117/12.430947
Event: Medical Imaging 2001, 2001, San Diego, CA, United States

Abstract

X-ray imaging detectors capable of very high resolution for a small field of view are important for x-ray micro-tomography, small specimen radiography, and certain x-ray scattering experiments. We have investigated the performance of small field detectors using scintillation phosphors coupled to a scientific CCD detector. The specific detector designs considered had fields of 8-12 mm that were used to record x-ray energies of 8-20 keV. The purpose of this work is to report the resolution (MTF) of designs that employed different optical coupling methods and different scintillation phosphor materials. For one detector system with a thin Gd₂O₂S phosphor a resolution of 48 lp/mm (presampled MTF = 0.10) was measured with pixels of 10.54 microns (Nyquist = 47.44) and a field of view of 12.14 mm x 13.09 mm.

Citation Download Citation

Allen Seifert, Michael J. Flynn, Manjul Shah, and Vivek V. Nagarkar "Performance of a small-field digital detector for soft x-ray imaging", Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, (28 June 2001); https://doi.org/10.1117/12.430947

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