Abstract
“scintigram Viewer”, SVO-1, is designed for reading the scintigram films by enhancing contrast of the pictures. This is composed of a light source, AKAI CVC-150 T V camera (with a zoom lens, Fu jinon TV·Z, f: 2), AKAI VCS-150 camera control unit and color TV (Sony, Trinitron CVM-1840) .
The light source is set in a box which has a side-window where the scintigram film is set. The light coming through the film is caught by TV camera where red and blue lights are separated, leaving green light not affected. These lights are then sent to AKAI VCS-150 where the gains for red and blue can be adjusted to desirable color as the operator likes for display.
After these manual processings, the scintigram film is shown on the color TV. The contrast enhancement can be done by adjusting either picture control on the TV panel or diaphragm of TV camera/or both, and the defocusing can be easily done by changing the focus of the lens. Because the TV camera has a zoom lens as mentioned above, either whole picture or enlarged picture of one area on the film can be displayed.
Initially, the author designed this machine to find out cold areas which were easily overlooked by the ordinary manner on the original films. However, after examining many scintigram films by this technique it was found that the search for the hot areas was more suitable with this machine and the whole body bone scintigram was the best so far. For example, the metastatic bone lesion which is not definite on the original scintigram by nacked eyes can be easily pointed out on the color T V after the abovementioned processings.
Now, this machine is working very well and is an important accessory for our daily work.
