[Fundamental evaluation of the orbital thin section CT].
D006801:Humans; D007908:Lens, Crystalline / Q000000981:diagnostic imaging; D008452:Maximum Allowable Concentration; D009900:Optic Nerve / Q000000981:diagnostic imaging; D009915:Orbit / Q000000981:diagnostic imaging*; D011829:Radiation Dosage; D014057:Tomography, X-Ray Computed