| Title |
Scattering Ray and Exposure Dose Reduction by Using Metal Sheet in X-ray Imaging System |
| Authors |
이호일(Ho-Il Lee) ; 배석환(Seok-Hwan Bae) ; 류연철(Yeun-Chul Ryu) ; 박영준(Young-Joon Park) ; 김용권(Yong-Gwon Kim) |
| DOI |
https://doi.org/10.5573/ieie.2021.58.6.89 |
| Keywords |
x-ray imaging system; grid; copper sheet; aluminium sheet; scattered x-ray |
| Abstract |
The conventional x-ray imaging system produces a 2-dimensional image of a patient’s anatomy because the tissues and bones have different x-ray attenuation coefficients. When the primary x-ray photon is traveling through the patient, the x-ray photon interacts with organs, tissue, and bone in the body; it also produces scattered x-rays which have lower energy than the incident x-ray. The scattered photons and the primary x-ray without interaction reach the image detector, and it forms the image noise and latter as the image signal. To achieve the maximum image contrast, a grid is used to block out the scattered x-ray but it also reduces the primary x-ray that reaches the image detector. In this study, we use the aluminium and copper sheets instead of the grid to reduce the scattered x-ray and improve the transmitted primary x-ray that reaches the x-ray detector. The experimental results using head phantom show that the metal sheets of aluminium and copper are effectively reduce the scattered radiation and produce same image quality with 20% lower exposure for the 0.1mm copper sheet and 37% lower x-ray exposure for the 0.1mm aluminium sheet. |