Abstract
Quantitation of coherent x-ray scatter traditionally involves measuring the intensity of the scattered x-ray over a range of
angles ( ) from the illuminating monochromatic x-ray beam. Spectral x-ray imaging produces the same information at a
single when bremsstrahlung x-ray exposure is used. We used a 200 m thick sheet-illumination of a phantom (lucite
cylinder containing holes with water, polyethylene, collagen, polycarbonate, and nylon) and a polycapillary x-ray optic
collimator to provide measurements at a fixed . A Medipix2 x-ray detection array (256
(55 m)
pixels) provided the spectral (E, 10 - 22 keV in 3keV energy bins) spread needed to generate the momentum transfer (q) profile information
at one angle. The tungsten x-ray source anode (aluminum filter) was operated at 35kVp at 20mA. The detected scatter
intensity was corrected for attenuation of the incident and the scattered x-ray by use of the regular CT image of the
phantom generated at the same energy bins. The phantom was translated normal to the plane of the fan beam in 65,
0.2mm, steps to generate the 3D image data. The momentum transfer profiles generated with this approach were
compared to published momentum transfer profiles obtained by other methods.