Sensorineural hearing loss. Internal Auditory Canals: The bilateral cochlear nerves are not well-defined on the DRIVE sequence, which appears blurry due to a low matrix size selection by the technologist. However, the cochlear nerves appear to present on sequences with higher slice thickness. The vestibular and facial nerves otherwise appear to be intact. There is no evidence of mass lesions. The inner ear structures, including the cochlea, vestibule, endolymphatic duct, and semicircular canals, appear unremarkable. The bilateral mastoid air cells and middle ears also appear unremarkable.Brain: There is no evidence of intracranial hemorrhage, mass, or acute infarct. The brain parenchyma and pituitary gland appear unremarkable. There is no abnormal intracranial enhancement. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.
1. The bilateral cochlear nerves do not appear well-defined on the DRIVE sequence and may be mildly deficient. However, technical factors may limit the visibility of the structures, since there is suggestion that they are present on sequences with higher slice thicknesses, which are otherwise not optimized for delineation of the cranial nerves. Follow up MRI using a DRIVE sequence with higher matrix size for the internal auditory canals may be useful and this can be performed at no additional charge.2. The brain and brainstem appear unremarkable.