### Abstract

The measurement of left ventricular function will be greatly enhanced when the Three-dimensional (3-D) shape of the ventricle can be closely assessed by biplane angiocardiograms taken from two perpendicular X-ray camera sets. The ventricle shape at a given time may be reconstructed by dividing each of the two orthogonal projection images into corresponding slices, processing each pair of corresponding slices to form a binary cross-sectional image, and stacking up these parallel cross-sectional images. Existing methods of reconstructing cross sections often involve assumptions of elliptic shape or convex symmetry. Recently a new approach was proposed to reconstruct each cross section by estimating an equal-divisor curve instead of estimating the boundary directly; it works well as long as a certain regularity condition (a much relaxed assumption) is satisfied. In this correspondence, we extend the notion to the equal-divisor surface of a 3-D object with two orthogonal projections, and develop a method of direct 3-D reconstruction of the left ventricle instead of piling up the parallel reconstructed two-dimensional (2-D) cross sections.

Original language | English |
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Pages (from-to) | 1666-1671 |

Number of pages | 6 |

Journal | IEEE Transactions on Systems, Man and Cybernetics |

Volume | 19 |

Issue number | 6 |

DOIs | |

Publication status | Published - 1989 Jan 1 |

### All Science Journal Classification (ASJC) codes

- Engineering(all)

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## Cite this

*IEEE Transactions on Systems, Man and Cybernetics*,

*19*(6), 1666-1671. https://doi.org/10.1109/21.44083