Shape recovery and volume calculation from biplane angiography in the stereotactic radiosurgical treatment of arteriovenous malformations

Foroni, Roberto; Gerosa, Massimo; Pasqualin, Alberto; Hoch, Jeffrey; Giri, Grazia; Pasoli, Armando; Nicolato, Antonio; Piovan, Enrico; Zampieri, Piergiuseppe; Lonardi, Stefano

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Volume 35, Issue 3 , Pages 565-577, 1 June 1996

Shape recovery and volume calculation from biplane angiography in the stereotactic radiosurgical treatment of arteriovenous malformations

Roberto Foroni, Ph.D.
- Reprint requests to: Roberto Foroni, Ph.D., Divisione di Neuroradiologia, Dipartimento Neurochirurgia, Ospedale Borgo Trento, 37126 Verona, Italy.
- University of Verona, Neurosurgery Department, University Hospital, Verona, Italy
Massimo Gerosa, M.D.
- University of Verona, Neurosurgery Department, University Hospital, Verona, Italy
Alberto Pasqualin, M.D.
- University of Verona, Neurosurgery Department, University Hospital, Verona, Italy
Jeffrey Hoch, Ph.D.
- Department of Electrical, Computer and Biomedical Engineering, Marquette University, Milwaukee, WI, USA
Grazia Giri, Ph.D.
- University of Verona, Neurosurgery Department, University Hospital, Verona, Italy
Armando Pasoli, Ph.D.
- University of Verona, Neurosurgery Department, University Hospital, Verona, Italy
Antonio Nicolato, M.D.
- University of Verona, Neurosurgery Department, University Hospital, Verona, Italy
Enrico Piovan, M.D.
- University of Verona, Neurosurgery Department, University Hospital, Verona, Italy
Piergiuseppe Zampieri, M.D.
- University of Verona, Neurosurgery Department, University Hospital, Verona, Italy
Stefano Lonardi, Ph.D.
- University of Verona, Neurosurgery Department, University Hospital, Verona, Italy

Accepted 19 February 1996.

Abstract

: A model for calculating the three-dimensional volume of arteriovenous malformations from biplane angiography.

: Three-dimensional (3D) volume reconstruction is easily feasible with axial, coronal, or sagittal computer tomography (CT) and nuclear magnetic resonance (NMR) scans. On the other hand, radiosurgicals treatment of arteriovenous malformations (AVM) is exclusively based on two orthogonal stereotactic projections, obtained with angiographic procedures. Most commonly, AVM volumes have been calculated by assimilating the nidus volume to a prolate ellipsoid. We present an algorithm dedicated to 3D structure reconstruction starting from two orthogonal stereotactic projections. This has been achieved using a heuristic approach, which has been widely adopted in the artificial intelligence domain.

: Tests on phantom of different complexity have shown excellent results.

: The importance of the algorithm is considerable. As a matter of fact: (a) it allows calculations of complex structures far away from regular ellipsoid; (b) it permits shape recovery; (c) it provides AVM visualization on axial planes.