The Application of Circular Boundary Overlapping in 3-D Reconstruction of Neck Tumors

Korean Journal of Head & Neck Oncology 2010;26(2):204-211.
Published online November 30, 2010.

Young Sam Yoo

두경부 종물의 3차원 재건 영상에서, 원형 경계선 중첩을 이용한 경계선 추출법의 응용

유영삼

Abstract

Background and Objectives ：Boundary detection and drawing are essential in 3D reconstruction of neck mass. Manual tracing methods are popular for drawing head and neck tumor. To improve manual tracing, cir-cular boundaries overlapping was tried. Materials and Methods ：Twenty patients with neck tumors were re-cruited for study. Representative frames were examined for shapes of outline. They were all single closed curves. Circular boundaries were added to fill the outlines of the tumors. Inserted circles were merged to form single closed curves(Circular boundary overlapping, CBO). After surface rendering, 3 dimensional images with vol-umes and area data were made. Same procedures were performed with manual tracing from same cases. 3D im-ages were compared with surgical photographs of tumors for shape similarity by 2 doctors. All data were evaluated with Mann-Whitney test(p<0.05). Results ：Shapes of boundaries from CBO were similar with boundaries from manual tracing. Tumor outlines could be filled with multiple circular boundaries., While both boundary tracing gave same results in small tumors, the bigger tumors showed different data. Two raters gave the similar high scores for both manual and CBO methods. Conclusion ：Circular boundary overlapping is time saver in 3 dimen-sional reconstruction of CT images.

Key Words: 3D reconstruction, Neck tumor, 3차원 재건