Method to measure the 3D angular orientation of the aortic valve plane from a single image of a valvuloplasty balloon: Findings of a large animal proof of concept experiment

Kenneth A. Fetterly, Verghese Mathew

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

During transcatheter aortic valve replacement procedures, alignment of the interventional x-ray beam with the aortic valve plane is required to guide valve placement. The purpose of this work was to develop methods to measure x-ray beam angles which are aligned with the aortic valve plane from a single x-ray image of a valvuloplasty balloon inflated across the left ventricular outflow tract (LVOT). A custom valvuloplasty balloon and image analytics were developed. In-vivo pig experiments demonstrated that the angular orientation of the LVOT can be measured with precision less than 3˚, including the influence of cardiac motion during rapid pacing. Using these methods, the angular orientation of the LVOT of a large mammal can be measured precisely and the continuous range of x-ray projection angles which are aligned with the aortic valve plane can be calculated.

Original languageEnglish (US)
Pages (from-to)99-104
Number of pages6
JournalJournal of Medical Engineering and Technology
Volume39
Issue number2
DOIs
StatePublished - Feb 1 2015

Keywords

  • 3D angular orientation
  • Aortic valve
  • Interventional x-ray imaging
  • Transcatheter aortic valve replacement

ASJC Scopus subject areas

  • Biomedical Engineering

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