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http://dx.doi.org/10.7742/jksr.2015.9.4.205

Acquisition of Monochromatic X-ray using Graded Multilayer Mirror  

Ryu, Cheolwoo (Radiation Imaging Technology Center of Jeonbuk TECHNOPARK)
Choi, Byoungjung (Radiation Imaging Technology Center of Jeonbuk TECHNOPARK)
Son, Hyunhwa (Radiation Imaging Technology Center of Jeonbuk TECHNOPARK)
Kwon, Youngman (Radiation Imaging Technology Center of Jeonbuk TECHNOPARK)
Kim, Byoungwook (Radiation Imaging Technology Center of Jeonbuk TECHNOPARK)
Kim, Youngju (Radiation Imaging Technology Center of Jeonbuk TECHNOPARK)
Chon, Kwonsu (Department of Radiological Science of Daegu Catholic University)
Publication Information
Journal of the Korean Society of Radiology / v.9, no.4, 2015 , pp. 205-211 More about this Journal
Abstract
At a recent medical imaging technology, the major issue of X-ray diagnosis in breast cancer is the early detection of breast cancer and low patient's exposure dose. As one of studies to acquire a monochromatic X-ray, Technologies using multilayer mirror had been preceded. However, a uniform multilayer mirror that consists of uniform thin-film thickness can acquire a monochromatic X-ray only in the partial area corresponds to angle of incidence of white X-ray, so there are limits for X-ray imaging technology applications. In this study, we designed laterally graded multilayer mirror(below GML) that reflects same monochromatic X-ray over the entire area of thin-film mirror, which have the the thickness of the linear gradient that correspond to angle of incidence of white X-ray. By using ion-beam sputtering system added the mask control system we fabricated a GML which has size of $100{\times}100mm^2$. The GML is designed to achieve the monochromatic X-ray of 17.5kev energy and has thin-film thickness change from 4.62nm to 6.57nm(3.87nm at center). It reflects the monochromatic X-ray with reflectivity of more than 60 percent, FWHM of below 2.6keV and X-ray beam width of about 3mm. The monochromatic X-ray corresponded to 17.5keV using GML would have wide application in development of mammography system with high contrast and low dose.
Keywords
Monochromatic X-ray; Graded multilayer mirror; Characteristic X-ray; X-ray reflectivity; X-ray monochromaticity; Ion-beam sputtering;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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