학술논문
Improvement of Implementation Time for Forward Projector in CT Reconstruction
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- 영문명
- 발행기관
- 한국방사선학회
- 저자명
- 천권수
- 간행물 정보
- 『한국방사선학회 학술대회 논문집』한국방사선학회 2017년 추계종합학술대회논문집, 32~32쪽, 전체 1쪽
- 주제분류
- 공학 > 기타공학
- 파일형태
- 발행일자
- 2017.11.10
0원
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국문 초록
전산화단층촬영(Computed Tomography)기법은 투영 데이터를 이용하여 단면 영상을 획득하는 방법이다. 단면 영상을 획득하기 위해서는 영상재구성 단계를 거치게 된다. 영상재구성은 크게 필터보정역투영(Filtered Back-projection)과 같은 해석적 재구성 방법과 반복적 재구성 방법(Iterative Reconstruction)으로 나눌 수 있다. 반복적 방법은 잡음이 많은 경우 또는 투영 데이터의 획득이 일정하지 못한 경우 등 해석적인 방법으로 다루기가 어려운 경우에 매우 유용하나, 전방 투영과 역투영을 반복해서 수행하기 때문에 계산 시간에 오래 걸리는 단점이 있다. 반복적 재구성 방법에서 전방투영(Forward Projection)은 매우 중요하고 계산 시간이 오래 걸리기 때문에 시간 단축을 위한 개선이 필요하다.
본 논문에서는 선적분에 기반을 둔 Siddon 방법을 개선한 알고리즘을 새롭게 제시하고 평행빔(Parallel Beam) 및 부채살빔(Fan Beam) 환경에서 시간 향상이 이루어 진 것을 검증한다.
영문 초록
목차
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