CT of the neck can examine the throat. CT examination is also a more common examination method in the larynx, which can detect many diseases in the larynx. Specific details are as follows: 1, check infectious diseases such as laryngeal infection, laryngeal abscess, parapharyngeal gap abscess, etc.; 2, clearly show the location, size and shape of laryngeal tumors and whether they invade the surrounding structures, such as common laryngeal cancer and hypopharyngeal cancer, which can be clearly diagnosed by CT scan and enhancement; 3, there are some precautions during laryngeal CT examination, such as requiring patients to try not to do swallowing during the examination For example, patients are required not to swallow as much as possible during the examination to avoid affecting the image quality; 4. Early lesions, such as laryngeal mucosal lesions, or early inflammation, and micro tumors are difficult to be detected by CT examination, so it is necessary to do specialist examination, i.e. laryngoscopy in ENT department, for early diagnosis. Therefore, in clinical practice, different examination methods are chosen according to the specific conditions of patients.