Radiography and tomography system using refractive lenses

C. K. Gary, H. Park, R. H. Pantell, Y. I. Dudchik, L. W. Lombardo, J. T. Cremer, F. Patrick Doty, H. Bradford Barber, Hans Roehrig
2007 Penetrating Radiation Systems and Applications VIII  
A prototype x-ray imaging system was built and tested for high-resolution x-ray radiography and tomography. The instrument consists of a microspot x-ray tube with a multilayer optic, a parabolic compound refractive lens (CRL) made of a plastic containing only hydrogen and carbon, and an x-ray detector. A rotation stage was added for tomography. Images were acquired of both grid meshes and biological materials, and these are compared to images achieved with spherical lenses. We found the best
more » ... e found the best image quality using the multilayer condenser with a parabolic lens, compared to images with a spherical lens and without the multilayer optics. The resolution was measured using a 155 element parabolic CRL and a multilayer condenser with the microspot tube. The experiment demonstrates about 1.1 µm resolution. KEYWORDS X-ray imaging, tomography, compound refractive lens, high-resolution x-ray imaging, microtomography, small animal imaging. SYSTEM CONSTRUCTION Images were recorded using a Photonic Sciences FDI Imager x-ray camera using a microspot x-ray tube with a multilayer optic and a parabolic compound refractive lens (CRL). The images taken with the parabolic lens microscope are compared to those taken by a bubble CRL 1,2 with and without the multilayer optic. Previously, well-aligned, closely-spaced series of biconcave refractive lenses have been used in a simple microscopes for imaging using synchrotron sources. 3, 4 Each biconcave lens has a focal length of
doi:10.1117/12.735645 fatcat:pmcqopubhzagjgybulmofsjzza