3D observation of expansion of stent and elastic recoil using micro-CT

Futoshi Mori, Toshio Nakayama, Teruo Matsuzawa, Makoto Ohta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The behavior of an expansion of balloon-expandable stent is in three-dimensional space. Therefore, it is necessary to observe in three-dimensions, however little previous research measures this behavior in three-dimensional space. Micro-CT is an image device that can observe more accurately with three-dimensions than the conventional CT. We reconstructed the stent shape using the medical image obtained by Micro-CT in three-dimensions. We observed the behavior of stent and the elastic recoil of stent (ERS), and measured ERS quantitatively. This aim is to observe the three-dimensional expansion behavior and ERS using Micro-CT, and evaluate quantitatively. We observed the three-dimensional expansion behavior of stent. Despite, the similarity of structures, the expansion behavior of stent and ERS were different in each structure. Moreover, we evaluated ERS quantitatively in proximal and distal of each structure influence from the balloon pressure. ERS ratio ranged from 4.7 % to 6.7 % in proximal and distal. When dividing stent into two in the direction of the length axis, ERS is shown proximal < distal in structures 1st to 3rd, and ERS is shown proximal > distal in structures 4th to 6th. And it reduces in the direction of a minor axis by maximum ERS 5.7%. We observed three-dimensional behavior of balloon-expandable stent and the ERS, and evaluate ERS quantitatively using Micro-CT. We found that it is necessary to observe in three-dimensions.

Original languageEnglish
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy
Pages235-238
Number of pages4
Edition6
DOIs
Publication statusPublished - 2009 Dec 1
EventWorld Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy - Munich, Germany
Duration: 2009 Sep 72009 Sep 12

Publication series

NameIFMBE Proceedings
Number6
Volume25
ISSN (Print)1680-0737

Other

OtherWorld Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy
CountryGermany
CityMunich
Period09/9/709/9/12

Keywords

  • Balloon-expandable stent
  • Elastic recoil of stent
  • Expansion behavior
  • Micro-CT
  • Three-dimensional

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering

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  • Cite this

    Mori, F., Nakayama, T., Matsuzawa, T., & Ohta, M. (2009). 3D observation of expansion of stent and elastic recoil using micro-CT. In World Congress on Medical Physics and Biomedical Engineering - Surgery, Minimal Invasive Interventions, Endoscopy and Image Guided Therapy (6 ed., pp. 235-238). (IFMBE Proceedings; Vol. 25, No. 6). https://doi.org/10.1007/978-3-642-03906-5-64