Carl Patterson produces screens of synthetic calcium tungstate. Double-intesifying screens are used to reduce exposure. 1924 Kodak introduces the first x-ray film with a cellulose acetate safety base. The Cleveland Hospital Fire kills 126 people. Burning radiographs create nitrogen dioxide.
Tragedy speeds conversion to saftey film base.
Patterson Par Speed screens are introduced. Onslaught of tuberculosis creates need for, and development of, photofluorography. 1939 Kodak Blue Brand medical x-ray film is introduced. Kodak announces the first film for industrial radiography. 1942 Work begins on the atomic bomb.