Scanography with rotation of the radiographic tube: a new method.

The quality of the radiographic image is compromised by secondary radiations and geometric unsharpness, which is proportional to the focal spot size. The authors describe a new system which significantly improves both elimination of scatter and reduction of the apparent focal spot size and gives superior radiographs to those made with a conventional x-ray machine. Advantages of the new system include (a) the lack of resolution and density gradients across the radiograph, (b) increased contrast due to descreased scatter, (c) increased resolution, (d) possible routine radiography with a 100-mu focal spot, (e) up to 2.5 x magnification, (f) increased acceptable kVp range, and (g) decreased dose to the patient.