X-ray diagnosis of dental disease, Chengdu, Sichuan, China, ca. 19461940-1950Also included in the International Mission Photography Archive.X-Ray Diagnosis, Univ. Dental Clinic, Dr. Kalman Kohn and Dr. (Mrs.) Dsan Shu-ngi (?) both of Dental Staff, WCUU. Patient and X-ray equipment also in picture; Dr. Kohn (in lab coat) and his assistant (in white smock) both wear white masks, while the patient (in Chinese dress) mimes (?) panic at the sight of the machine.still image