放射光X線を用いた屈折コントラストによる骨画像

概要

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The X-ray refraction-contrast imaging using synchrotron radiation with some X-rayenergies is successfully performed at B120B2 of SPring-8. The refraction-contrast imagesof bone samples such as human dried proximal phalanx, wrist, upper cervical vertebrae andsella turcica, and as mouse proximal femur, using the synchrotron X-ray are always betterin image contrast and resolution than those of the absorption-contrast images using the synchrotronX-ray and/or the conventional X-ray tube. There is much likeness in the imagecontrast and resolution of trabeculae bone in the human dried proximal phalanx betweenX-ray energy of 30 keV at sample-to-film distance of lm and those of 40, 50 keV at thoseof 4,5m, respectively. High-energy refraction-contrast imaging with suitable sample-to-film distance could reduce the exposure dose in human imaging. In the refraction-contrast imaging of human wrist, upper cervical vertebrae, sella turcica and mouseproximal femur using the synchrotron X-ray, we can obtain better image contrast and resolutionto correctly extract morphological information for diagnosis corresponding to each ofthe clinical field than those of the absorption-contrast images.
Japan Society of Medical Physicsの論文