Magnetic resonance imaging and cross sectional anatomy of the normal equine sinuses and nasal passages

The purpose of this investigation was to define the magnetic resonance imag ing anatomy of the rostral part of the equine head. 10 mm-thick, T1-weighte d images of two isolated equine cadaver heads were obtained using a 1.5 Tes la magnet acid a body coil. MR images were compared to corresponding frozen cross-sections of the cadaver head. Relevant anatomic structures were iden tified and labeled at each level. The resulting images provided excellent a natomic detail of the oral and nasal cavities, paranasal sinuses and associ ated structures. Annotated MR images from this study are intended as a refe rence for clinical MR imaging studies of the equine head.