MRV Head Without IV Contrast There is no relevant literature to support the use of MRV head without IV contrast for evaluation of unilateral NPT. Tinnitus US Duplex Doppler Carotid Artery There is no relevant literature to support the use of US duplex Doppler carotid artery for evaluation of unilateral NPT. US Duplex Doppler Transcranial There is no relevant literature to support the use of US duplex Doppler transcranial for evaluation of unilateral NPT. US Head There is no relevant literature to support the use of US head for evaluation of unilateral NPT. Variant 4: Nonpulsatile tinnitus, bilateral; no hearing loss, and no neurologic deficit, and no trauma. Initial imaging. Imaging is not helpful in cases of bilateral NPT related to age-related hearing loss, prior exposure to noise, acoustic trauma, ototoxic medications, and chronic bilateral hearing loss [92]. Most cases of bilateral NPT are associated with sensorineural hearing loss, and imaging is typically unrevealing in such cases [34,93,94]. The AAO-HNS guidelines make a strong recommendation against any imaging studies of the head and neck for the subset of patients in whom tinnitus does not localize to 1 ear, is nonpulsatile, and is not associated with focal neurological abnormalities or an asymmetric hearing loss [6,7]. Arteriography Cervicocerebral There is no relevant literature to support the use of conventional arteriography for evaluation of bilateral NPT. CT Head With IV Contrast There is no relevant literature to support the use of CT head with IV contrast for evaluation of bilateral NPT. CT Head Without and With IV Contrast There is no relevant literature to support the use of CT head without and with IV contrast for evaluation of bilateral NPT. CT Head Without IV Contrast There is no relevant literature to support the use of CT head without IV contrast for evaluation of bilateral NPT.
Tinnitus. MRV Head Without IV Contrast There is no relevant literature to support the use of MRV head without IV contrast for evaluation of unilateral NPT. Tinnitus US Duplex Doppler Carotid Artery There is no relevant literature to support the use of US duplex Doppler carotid artery for evaluation of unilateral NPT. US Duplex Doppler Transcranial There is no relevant literature to support the use of US duplex Doppler transcranial for evaluation of unilateral NPT. US Head There is no relevant literature to support the use of US head for evaluation of unilateral NPT. Variant 4: Nonpulsatile tinnitus, bilateral; no hearing loss, and no neurologic deficit, and no trauma. Initial imaging. Imaging is not helpful in cases of bilateral NPT related to age-related hearing loss, prior exposure to noise, acoustic trauma, ototoxic medications, and chronic bilateral hearing loss [92]. Most cases of bilateral NPT are associated with sensorineural hearing loss, and imaging is typically unrevealing in such cases [34,93,94]. The AAO-HNS guidelines make a strong recommendation against any imaging studies of the head and neck for the subset of patients in whom tinnitus does not localize to 1 ear, is nonpulsatile, and is not associated with focal neurological abnormalities or an asymmetric hearing loss [6,7]. Arteriography Cervicocerebral There is no relevant literature to support the use of conventional arteriography for evaluation of bilateral NPT. CT Head With IV Contrast There is no relevant literature to support the use of CT head with IV contrast for evaluation of bilateral NPT. CT Head Without and With IV Contrast There is no relevant literature to support the use of CT head without and with IV contrast for evaluation of bilateral NPT. CT Head Without IV Contrast There is no relevant literature to support the use of CT head without IV contrast for evaluation of bilateral NPT.