Word: ghiselin
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Dates: during 1930-1939
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...Reported was the successful making of x-ray moving pictures with a home camera and 16-mm. film. Drs. William Holmes Stewart, William Joseph Hoffman, and Francis Henshall Ghiselin developed the technique at Manhattan's Lenox Hill Hospital. The heart of the problem was to get a sharp, clear x-ray image on a fluoroscopic screen. The sharpness of the image depended on 1) the brightness of fluorescent material in the screen and 2) the length of time a patient may be subjected to x-ray transillumination. The invention in England of a zinc sulphide preparation which gave...
...ordinary patients, Drs. Stewart, Hoffman & Ghiselin operate the moving picture camera at a standard speed of 16 frames a second, or 32 frames for the cycle. For unusually thick patients, through whom x-rays do not penetrate easily, the operators slow the camera twelve or eight frames a second. Thin people can stand 24 frames a second. The four chambers of their hearts then can be seen contracting on the projection screen...