ABSTRACT
In the early days of imaging, one of the less desirable aspects of television display was the lack of a means of obtaining a permanent record. The commercial television industry has been storing programs on tape recorders for many years. The physical principles of magnetic recorders are the same for video tape and disc recorders. Video tape and video disc magnetic recorders are commonly used to store fluoroscopic images. The magnetic tape consists of a plastic base, such as acetate or polyester, on the surface of which fine particles of magnetic material are dispersed. The magnetic particles contact the recording head at the gap and complete the magnetic path in the recording head core. If the electric signal flowing into the coil of wire, or the recording head, is varied continuously and if the magnetic material is moved continuously, a permanent record of the electrical signal will be realized.
