1968 Volume 24 Issue 4 Pages 267-270
A device was made to which a frame with which 2 pictures could be taken serially were attached. One of the good points is that an assistant is able to change x-ray films in 2.5 seconds, and so is never exposed to radiation. Morever, we would like to emphasize that this device was made rather inexpensively, utillizing an old bed, acrylic acid resin and so on.