The ability of the 3D CT to make precise measurements and axial images can be used to view the characteristics of airways and diagnose apnea, pharyngeal diseases and diseases of the upper respiratory tract.
A sagittal view of the upper respiratory tract or nasal section of the pharynx can clearly show the relation of adenoid tissue (so called third tonsil) with the posterior section of the nasal concha.
A transversal view helps diagnose the condition of the airways. A view of the posterior section of the pharynx is used in determining anatomical obstacles made by hypertrophic adenoid tissue. Air passage can be measured in three dimensions.