Cinefluorography is a professional motion-picture process. To obtain high-quality motion pictures for medical diagnosis, we must understand and apply the techniques that produce high-quality motion pictures for the entertainment industry. These techniques include film selection, processing of cine films, and quality assurance of the final product.
Historically, films for cinefluorography were selected from films developed for other purposes and were available at a given moment. Early image intensifiers had low gains of the order of 1000 to 3000 times. Adequate motion-picture processors, at a cost compatible with cardiology department funds, were not available. The first film requirement was a high-speed film of at least medium contrast. Such a film was in use in the motion-picture industry—Eastman double-X negative film. This film became widely used in cinefluorography. Unfortunately, it did not meet the requirements of every laboratory or diagnostician. What was an acceptable film result in one laboratory did not always give the same result when used in another laboratory. Consequently, other cine films were tried and selected by trial and error.
Cine film is the recording media and repository of the final permanent image needed for diagnosis. Many factors besides the film affect the quality of the image the film records. The usual approach to choosing a film for photographic application is to match the application against film characteristics as established a film's characteristic curve. This approach is not suitable in cinefluorography. A number of “system” factors affect the final contrast recorded on the film. Unfortunately, these factors cannot . . .