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Middle and Inner Ear 3D Reconstructions using High Resolution X‐ray Micro‐Tomography
Author(s) -
LABROUSSE Marc,
DUBERNARD Xavier,
SETTEMBRE Nicla,
TONNELET Romain,
AVISSE Claude,
DEVY Jérôme,
RENARD Yohann
Publication year - 2016
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.30.1_supplement.560.3
Subject(s) - temporal bone , anatomy , middle ear , cochlea , semicircular canal , computer science , inner ear , tomography , computer vision , artificial intelligence , vestibular system , biology , medicine , radiology , neuroscience
The temporal bone is a complex 3D structure that is difficult to teach to ENT residents. Learning about this anatomy from classical textbooks requires considerable intellectual gymnastics to deal with this spatially complex structure. We present a new way for teaching this anatomy with high resolution 3D reconstructions using X‐ray micro‐tomography. Materials and Methods 10 human petrous parts of temporal bones were fixed with Winckler's solution. CT images were acquired with a CT scanner (Skyscan 1076, Bruker, Kontich, Belgium). The camera was continuously rotated by 180° and the following parameters were used for acquisition: 50 kV, 0.5 mm Al filter, 200 A source current, 35 m isotropic resolution, 180 ms exposure time, and 0.7° rotation step. The projections were reconstructed with a filtered backprojection algorithm in Skyscan software (NRecon, Skyscan). Reconstructed images were analyzed with ORS Visual software.(v1.5, Montreal), which allowed multiple display and post‐processing possibilities (3D VR; orthogonal/curved multiplanar reformation). Results and Discussion Three‐dimensional and multiplanar studies of the temporal bone morphology were possible with appropriate thresholding. The whole components of the middle ear (ossicles, tympanic cavity bony reliefs), the inner ear (cochlea, modiolus, cochlear canal, vestibule and semicircular canals) and their respective anatomic relationships are clearly visible. This method seems very effective in teaching this complex anatomy. Conclusion 3D reconstructions using high resolution X‐ray micro‐tomography aid comprehension of temporal bone complex anatomy. This precise knowledge will help residents to better understand otological surgery.