• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2005 Fiscal Year Final Research Report Summary

Study on 3 Dimensional registration for pipe-shaped objects with branches

Research Project

Project/Area Number 16560370
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Measurement engineering
Research InstitutionFaculty of Computer and Information Sciences, Hosei University

Principal Investigator

HANAIZUMI Hiroshi  Hosei University, Faculty of Computer and Information Sciences, Professor, 情報科学部, 教授 (60143385)

Project Period (FY) 2004 – 2005
KeywordsSuccessive region growing / Homotopy / Significance / Principal branch model / Adaptive division into tri-pyramids / Helical CT data / Multi-slice CT data / Artery-vein separation of lung vessels
Research Abstract

The objective of the research was to construct a system for lung cancer screening using helical CT data. The basic idea for constructing such a screening system came from that 3 Dimensional processing easily extracted tumor from 3D helical CT data. In this system, tumors were extracted as changes of 3D shape of lung vessels between multi-temporal helical CT data. Concrete targets of the research were construction of sub-system for recognizing lung vessels, one for matching branch of lung vessels between multi-temporal helical CT data and one for registering 3D shape of lung vessels.
1.Recognition of lung vessels : A method named as successive region growing (SRG) was developed for the recognition of pipe-shaped object with branches. From the inside of the heart, SRG recognized a surface element by using layer by layer processing. In the vessels, voxels attached to the original layer were regarded as the neighboring layer. The gravity point of the layer was regarded as the part of the sk … More eleton. The branching point was found when new layer consisted of two or more islands. This meant the homotopy changes between the original layer and new one. An index, significance was also introduced to reject false branches and to branch matching.
2.Vessel branch matching : Firstly, skeletons of lung vessels among multi-temporal helical CT data were registered. Originally, principal branch model was developed and branches are matched by using only significance on the assumption that vessels had only binary branching. Some vessels, however, had apparent triple branching near the heart and caused uncertainty in branching. So, spherical surface search algorithm was newly developed for the branch matching. Spheres were put on a previously matched branching point pair and their radii were synchronously increased until one of surfaces reached to the next branching point. Relative position of crossing points among skeletons and sphere surfaces were evaluated and nearest pairs were selected as the matched pair of branches. The performance was evaluated by using small scale vessel data with branches.
3.Registration of vessels : A piece-wise linear transformation method was proposed for the co-registration of vessel bodies between multi-temporal helical CT data using the skeleton matching results. In the method, the data region was divided into tri-pyramids whose vertices were branching points matched. After the division, 3D Affine transformation was applied to the corresponding pair of tri-pyramids. The performance was evaluated by using artificially distorted lung vessels which were originally recognized and extracted by SRG from a multi-slice CT data set. Less

  • Research Products

    (4 results)

All 2006

All Journal Article (4 results)

  • [Journal Article] 多重時刻ヘリカルCTデータにおける肺野内血管の高精度重ね合わせ手法2006

    • Author(s)
      花泉, 上村, 田中
    • Journal Title

      電子情報通信学会技術研究報告 105.579

      Pages: 143-146

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 肺野内血管の連続性に基づく動脈と静脈との分離方法2006

    • Author(s)
      田中, 花泉
    • Journal Title

      電子情報通信学会技術研究報告 105.580

      Pages: 101-104

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] An Accurate Method for Registering Lung Vessels using Multi-temporal Helical CT Data2006

    • Author(s)
      Hiroshi Hanaizumi, Tomoko Uemura, Shinya Tanaka
    • Journal Title

      IEICE Technical Report vol.105, No.579

      Pages: 143-146

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] A Method for Separation of Pulmonary Artery from Vein using Continuity of Lung Vessels2006

    • Author(s)
      Shinya Tanaka, Hiroshi Hanaizumi
    • Journal Title

      IEICE Technical Report vol.105, No.580

      Pages: 101-104

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2007-12-13  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi