Anatomical region | CT | MRI | |
---|---|---|---|
Periodontal apparatus | Periodontal space: Periodontal ligament (PDL) | Slightly blurry, isodense gap between hard dental tissue and alveolar bone, moderate distinction from hard dental and bony tissue (transverse, dorsal) | Hyperintense gap, good distinction of hard dental tissue and alveolar bone* (T2w and PDw dorsal) |
Alveolar bone | Hyperdense bone* (transverse, dorsal) | Hypointense cortical bone, marked off by the PDL (T2w and STIR transverse) | |
Maxillary sinus | Mucosa and cortical bone | Respiratory epithelium: not visible; sinus: air-filled and hypodense; hyperdense thin-walled cortical bone* (transverse) | Signal free cortical bone, delineated by a hyperintense line of mucosa* (T2w and STIR transverse) |
IOC | Soft tissue inside and bony structures | Soft tissue inside the canal: low attenuated IOC*: high attenuated, very well distinguishable (transverse) | IOC: signal free, becomes evident through the bright mucosa covering the bony surface of the maxillary sinus (T2w and STIR transverse) Soft tissue*: inhomogeneous, high to moderate signal, intense structures inside: nerve with moderate signal intensity, blood vessels with high or low signal intensity (T2w and STIR transverse) |