A New Tomographical Method for Radiographing Curved Outer Surfaces

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Abstract
So far this method has been limited to cranial radiography. A radiogram of the cranium can be produced unfolded in one plane, so that the areas on different sides of the cranium appear in the picture side by side. From this kind of "cranial charts" it is easy to observe fractures by the aid of only one picture. The picture is taken by means of a rotary chair, either by using a semicylindric film cassette secured to the head or by using a linearly moving film cassette. In each of these cases a narrow, somewhat divergent, cluster of rays is projected through the head to the film cassette on the opposite side.

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