| Title |
Dual Energy X-ray Detector using Color Filter and Dual Scintillator |
| Authors |
서연호(Yeon-ho Seo) ; 김성미(Sung-mi Kim) ; 박원기(Won-gi Park) ; 이성철(Sung-chul Lee) ; 조성익(Seong-ik Cho) |
| DOI |
https://doi.org/10.5573/ieie.2024.61.4.21 |
| Keywords |
X-ray detector; Dual image; Dual energy; CMOS image sensor; Color filter |
| Abstract |
X-ray detectors have long been used for large-area imaging diagnostics such as chest radiography. With technological advancements, the imaging method transitioned from analog to digital, leading to the development of a-Si TFT (Thin Film Transistor) and CMOS Image sensors. Detectors using CMOS image sensors have gained attention for their high speed and accuracy, but due to the difficulties in manufacturing large areas, they are primarily used in small detectors. Recent research focuses on capturing high-quality images and reducing radiation exposure. Additionally, efforts are being made to enhance diagnostic accuracy by capturing tissue images using X-rays. Current X-ray equipment uses high-energy X-rays around 120kVp to capture bone images, but lower-density materials like tissues are not imaged due to their transparency to such X-rays. Capturing both bone and tissue images requires shooting with both high and low-energy X-rays, which increases radiation exposure. This paper proposes a method using dual-energy scintillators, color filters, and CMOS image sensors to separate bone and tissue images in a single shot, reducing exposure. Tests with commercial scintillators confirmed that the proposed method can effectively separate images at high X-ray energies. |