Tumor boundary extraction from brain MRI images using active contour models (Snakes)

스네이크를 이용한 뇌 자기 공명 영상에서 종양의 경계선 추출

  • Published : 2003.04.01

Abstract

The study is to automatically or semi-automatically detect the accurate contour of tumors or lesions using active contour models (Snakes) in the MRI images of the brain. In the study we have improved the energy-minimization problem of snakes using dynamic programming and have utilized the values of the canny edge detector by the image force to make the snake less sensitive in noises. For the extracted boundary, the inside area, the perimeter and its center coordinates could be calculated. In addition, the multiple 2D slices with the contour of the lesion wore combined to visualized the shape of the lesion in 3D. We expect that the proposed method in this paper will be useful to make a treatment plan as well as to evaluate the treatments.

본 연구는 스네이크를 이용하여 뇌의 자기 공명 영상에서 자동 혹은 반자동으로 종양 또는 병변의 정확한 윤곽선을 찾기 위함이다. 본 연구에서 기존의 스네이크가 가지고 있는 에너지 최적화 문제를 동적 프로그래밍을 이용하여 개선하였고, Image Force로 Canny Edge Detector의 값을 이용하여 스네이크가 잡음에 덜 민감하도록 하였다. 병변의 윤곽선이 추출되면, 병변의 면적, 중심 좌표, 둘레 등을 계산하도록 하였다 또한 병변에 대한 다수의 2차원 단면 영상을 합성하여 3차원으로 재구성하여 병변의 입체적인 모양을 볼 수 있도록 하였다. 본 연구에서 제안된 방법은 뇌종양 환자의 치료 계획 수립 뿐 아니라 경과를 평가하는데 유용하게 활용될 것으로 기대된다.

Keywords

References

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