Get access

USING SEMI-AUTOMATED SEGMENTATION OF COMPUTED TOMOGRAPHY DATASETS FOR THREE-DIMENSIONAL VISUALIZATION AND VOLUME MEASUREMENTS OF EQUINE PARANASAL SINUSES

Authors

  • Markus Brinkschulte,

    Corresponding author
    1. Equine Clinic, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
    • Address correspondence and reprint requests to Markus Brinkschulte, Equine Clinic, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany. E-mail: m.brinkschulte@gmx.de

    Search for more papers by this author
  • Astrid Bienert-Zeit,

    1. Equine Clinic, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
    Search for more papers by this author
  • Matthias Lüpke,

    1. Institute of General Radiology and Medical Physics, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
    Search for more papers by this author
  • Maren Hellige,

    1. Equine Clinic, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
    Search for more papers by this author
  • Carsten Staszyk,

    1. Institute of Veterinary Anatomy, Histology and Embryology, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
    2. Faculty of Veterinary Medicine, Justus-Liebig-University Giessen Germany formerly Institute of Anatomy, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
    Search for more papers by this author
  • Bernhard Ohnesorge

    1. Equine Clinic, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
    Search for more papers by this author

  • Dr. Markus Brinkschulte and Dr. Astrid Bienert-Zeit are joint first authors.

  • Prof. Dr. Carsten Staszyk and Prof. Dr. Bernhard Ohnesorge contributed equally to this work.

  • No funding sources.

Abstract

The system of the paranasal sinuses morphologically represents one of the most complex parts of the equine body. A clear understanding of spatial relationships is needed for correct diagnosis and treatment. The purpose of this study was to describe the anatomy and volume of equine paranasal sinuses using three-dimensional (3D) reformatted renderings of computed tomography (CT) slices. Heads of 18 cadaver horses, aged 2–25 years, were analyzed by the use of separate semi-automated segmentation of the following bilateral paranasal sinus compartments: rostral maxillary sinus (Sinus maxillaris rostralis), ventral conchal sinus (Sinus conchae ventralis), caudal maxillary sinus (Sinus maxillaris caudalis), dorsal conchal sinus (Sinus conchae dorsalis), frontal sinus (Sinus frontalis), sphenopalatine sinus (Sinus sphenopalatinus), and middle conchal sinus (Sinus conchae mediae). Reconstructed structures were displayed separately, grouped, or altogether as transparent or solid elements to visualize individual paranasal sinus morphology. The paranasal sinuses appeared to be divided into two systems by the maxillary septum (Septum sinuum maxillarium). The first or rostral system included the rostral maxillary and ventral conchal sinus. The second or caudal system included the caudal maxillary, dorsal conchal, frontal, sphenopalatine, and middle conchal sinuses. These two systems overlapped and were interlocked due to the oblique orientation of the maxillary septum. Total volumes of the paranasal sinuses ranged from 911.50 to 1502.00 ml (mean ± SD, 1151.00 ± 186.30 ml). 3D renderings of equine paranasal sinuses by use of semi-automated segmentation of CT-datasets improved understanding of this anatomically challenging region.

Ancillary