a. True. In analogue systems, recording was principally done by film-screen radiography; the cassette with the film in place was automatically driven into the position in front of the intensifier and the exposure made, with a time delay between initiation and exposure of <1 *. The film and cassette are linked to a select table collimator so that multiple exposures can be made on a single film, which is referred to as a spot film.
b. True. An alternative method of taking spot films was to use a camera attached to the image intensifier using a mirror introduced between the output screen and the TV camera, then take a picture of the image on the output screen of the intensifier. The film size was 105 mm, about 30% of the size of what would be seen on the conventional spot film. These films are referred to as photo spot images.
c. False. Photo spot films have a short exposure time and increased mA, resulting in reduced noise.
d. True.
e. True. By synchronizing the pulse rate and frame rate, cine recordings can be made.
