Clinical Study of CT 5400 RT for System Validation

Inclusion Criteria: * 18≤ Age ≤ 75 years old; * Subjects with Clear consciousness; Subjects can cooperate and act autonomously; * Subjects agree to participate in this clinical study and sign the subject's informed consent; * Women subjects of childbearing age should have a negative pregnancy test and should have no plans to become pregnant in the next 6 months. Exclusion Criteria: * Subjects who do not have full capacity for civil conduct; * Women subjects who are pregnant or in lactating phase; * Subjects who have had a CT scan within one year; * Subjects with a history of allergies or asthma, severe hepatic and renal insufficiency or hyperthyroidism in which are considered as contraindication for CT contrast-enhanced examination; * According to the opinion of the investigator: any situation that may affect the evaluation of the results or expose subjects into health risk; * Subjects with mental disorders who cannot cooperate with the examination