X-ray modulation transfer functions of photostimulable phosphor image plates and scanners

Journal Article · Sat Nov 01 04:00:00 EDT 2008 · Applied Optics

DOI:https://doi.org/10.1364/AO.47.005753· OSTI ID:21175711

Seely, John F; Holland, Glenn E; Hudson, Lawrence T; Henins, Albert

The modulation transfer functions of two types of photostimulable phosphor image plates were determined in the 10 keV to 50 keV x-ray energy range using a resolution test pattern with up to 10 line pairs per mm (LP/mm) and a wavelength dispersive x-ray spectrometer. Techniques were developed for correcting for the partial transmittance of the high energy x rays through the lead bars of the resolution test pattern, and the modulation transfer function (MTF) was determined from the measured change in contrast with LP/mm values. The MTF was convolved with the slit function of the image plate scanner, and the resulting point spread functions (PSFs) were in good agreement with the observed shapes and widths of x-ray spectral lines and with the PSF derived from edge spread functions. The shapes and the full width at half-maximum (FWHM) values of the PSF curves of the Fuji Superior Resolution (SR) and Fuji Maximum Sensitivity (MS) image plate detectors, consisting of the image plate and the scanner, determined by the three methods gave consistent results: The SR PSF is Gaussian with 0.13 mm FWHM, and the MS PSF is Lorentzian with 0.19 mm FWHM. These techniques result in the accurate determination of the spatial resolution achievable using image plate and scanner combinations and enable the optimization of spatial resolution for x-ray spectroscopy and radiography.

• OSTI ID: 21175711
• Journal Information: Applied Optics, Journal Name: Applied Optics Journal Issue: 31 Vol. 47; ISSN 0003-6935; ISSN APOPAI
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
IMAGES
KEV RANGE 10-100
OPTIMIZATION
SENSITIVITY
SPATIAL RESOLUTION
TRANSFER FUNCTIONS
WAVELENGTHS
X-RAY DETECTION
X-RAY SPECTROMETERS
X-RAY SPECTROSCOPY