Three-dimensional imaging:
(cone-beam computed tomography OR volumetric radiography OR volumetric tomography OR digital volumetric radiography OR digital volumetric tomography OR digital volume tomography OR cbct OR cone-beam ct OR cone beam imaging OR cone-beam OR “cone beam” OR volumetric ct OR conebeam OR cb-ct OR volumetric computed tomography OR X-ray computed tomography OR X-ray computerized tomography OR “CT scans” OR “CT scan” OR “CAT scan” OR “CAT scans” OR (magnetic resonance imaging) OR MRI OR 3D OR 3-D OR 3-dimensional OR three-dimensional
Upper airway:
(upper airway OR upper airways OR “respiratory tract” OR pharynx OR pharyngeal OR oropharynx OR oropharyngeal OR nasopharynx OR nasopharyngeal OR hypopharynx OR hypopharyngeal))
Head posture/tongue posture:
(((((Head posture) OR (head postures) OR (head position) OR (head positions) OR (head rotation) OR (head positioning) OR (tongue position) OR (tongue posture) OR (hyoid bone position) OR (position of the hyoid bone) OR (jaw position) OR (jaw positions) OR (mandibular position) OR (mandibular positions))))
Combined keywords and MeSH for the search in PubMed database (National Library of Medicine, NCBI) performed on December 1, 2015:
(cone-beam computed tomography OR volumetric radiography OR volumetric tomography OR digital volumetric radiography OR digital volumetric tomography OR digital volume tomography OR cbct OR cone-beam ct OR cone beam imaging OR cone-beam OR “cone beam” OR volumetric ct OR conebeam OR cb-ct OR volumetric computed tomography OR X-ray computed tomography OR X-ray computerized tomography OR “CT scans” OR “CT scan” OR “CAT scan” OR “CAT scans” OR (magnetic resonance imaging) OR MRI OR 3D OR 3-D OR 3-dimensional OR three-dimensional AND (upper airway OR upper airways OR “respiratory tract” OR pharynx OR pharyngeal OR oropharynx OR oropharyngeal OR nasopharynx OR nasopharyngeal OR hypopharynx OR hypopharyngeal)) AND (((((Head posture) OR (head postures) OR (head position) OR (head positions) OR (head rotation) OR (head positioning) OR (tongue position) OR (tongue posture) OR (hyoid bone position) OR (position of the hyoid bone) OR (jaw position) OR (jaw positions) OR (mandibular position) OR (mandibular positions))))