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Fig. 4 | BMC Veterinary Research

Fig. 4

From: Canine atlantoaxial optimal safe implantation corridors – description and validation of a novel 3D presurgical planning method using OsiriX™

Fig. 4

Trigonometric equations used for ProjA calculations based on anatomical coordinates. a Anatomical coordinate systems were defined for C1 and C2 by positioning 3 points (O, A, B) in the sagittal plane of each vertebra. The point O represents the origin of the coordinate system, while (AB) represents the craniocaudal axis (X). b Geometrical demonstration of sagittal (yellow), dorsal (blue) and transverse (purple) ProjA (Ɵ) calculation based on anatomical coordinates (x, y, z) of a vector \( \left(\overrightarrow{\boldsymbol{IE}}\right) \)

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BMC Veterinary Research

ISSN: 1746-6148

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