A CT scan of the nasopharynx is a specialized X‑ray that creates detailed cross-sectional images of the upper throat behind the nose. It helps detect tumors, infections, sinus disease, structural abnormalities, and assess spread to nearby tissue or lymph nodes. The test is quick and noninvasive, sometimes uses contrast dye for better detail, and exposes the patient to a small amount of ionizing radiation.

The main anatomical landmark of the nasopharynx is the torus tubarius — a mucosal elevation on the lateral wall formed by the cartilaginous opening of the Eustachian (auditory) tube. The roof and posterior wall house the pharyngeal tonsil (adenoids). These landmarks guide endoscopic assessment and affect middle ear ventilation and nasopharyngeal pathology.

MRI is the imaging modality of choice for assessing primary nasopharyngeal carcinoma and skull-base/cranial-nerve involvement because of superior soft-tissue resolution. 18F-FDG PET–CT is preferred for nodal staging and detecting distant metastases. Contrast-enhanced CT complements MRI when bone detail or radiotherapy/surgical planning is required. Combined MRI and PET–CT generally provide the most accurate staging and treatment planning.

The nasopharynx is the uppermost part of the pharynx, located posterior to the nasal cavity and above the soft palate. It extends from the choanae (posterior nasal apertures) to the level of the soft palate, communicating inferiorly with the oropharynx. It lies beneath the skull base and contains the pharyngeal tonsil (adenoids) and openings of the Eustachian (auditory) tubes.

Early signs of nasopharyngeal problems include persistent nasal congestion or obstruction (often one-sided); chronic or bloody nasal discharge; recurrent nosebleeds; reduced sense of smell; ear symptoms like fullness, hearing loss, tinnitus, or recurrent ear infections from Eustachian tube dysfunction; sore throat or nasal (hyponasal) voice; unexplained neck lumps (swollen lymph nodes); and persistent headache or facial pain.

An ENT orders a CT scan to evaluate sinus and nasal anatomy, chronic or complicated sinusitis, and to plan surgery. CT details bony structures (sinus walls, facial fractures, temporal bone) and detects complications, cholesteatoma, tumors, and trauma. It helps assess orbital and skull-base involvement, congenital anomalies, and postoperative issues. For soft-tissue or nerve assessment, MRI is often complementary.