다층구조 엑스선 검출기를 이용한 이중에너지 조영제 영상의 물질 구분에 관한 연구

• 영문명: A Study on the Material Decomposition of Dual-Energy Iodine Image by Using the Multilayer X-ray Detector
• 발행기관: 대한방사선과학회(구 대한방사선기술학회)
• 저자명: 김준우(Jun-Woo Kim)
• 간행물 정보: 『방사선기술과학』방사선기술과학 제44권 제5호, 465~471쪽, 전체 7쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2021.10.30

영문 초록

Dual-energy X-ray imaging (DEI) techniques can provide X-ray images that a certain material is suppressed or emphasized by combining two X-ray images obtained from two different x-ray spectrum. In this paper, a single-shot DEI, which uses stacked two detectors (i.e., multilayer detector), is proposed to reduce the patient dose and increase throughput in angiography. The polymethyl methacrylate (PMMA) and aluminum (Al) were selected as two basis materials for material decomposition, and material-specific images are reconstructed as a vector combination of these two materials. We investigate the contrast and noise performance of material-decomposed images using iodine phantoms with various concentrations and diameters. The single-shot DEI shows comparable performances to the conventional dual-shot DEI. In particular, the single-shot DEI shows edge enhancement in material-decomposed images due to the different spatial-resolution characteristics of upper and lower detectors. This study could be useful for designing the multilayer detector including scintillators and energy-separation filter for angiography purposes.

목차

Ⅰ. 서론

Ⅱ. 대상 및 방법

Ⅲ. 결과

Ⅳ. 고찰

Ⅴ. 결론

키워드

혈관조영술 물질 구분 다층구조 검출기 단일조사 이중에너지 콘트라스트 노이즈 공간 해상도 Angiography Material Decomposition Multilayer Detector Single-Shot Dual-Energy Contrast Noise Spatial Resolution