[Sialography with direct multiple image enlargement and the processing of the sialograms on an analog computer]

To extend the potentialities of sialography, we used roentgenography with direct multiple amplification of the image by Reis microfocal portable x-ray diagnostic device and analyzed this image by analog UAR-1 computer operating in a high-frequency harmonization mode. The basic feature of such roentgenography is spatial stratification of the object shadow simultaneously forming its spatial image. High-frequency harmonization of an x-ray image essentially improved its contrast, this permitting detection of small formations poorly shown on sialogram, the contours of these formations and relationships between them. A total of 85 patients were examined using this method. Analysis of the resultant sialograms showed that using this method it is possible to assess the status of small structures of the gland, detect the changes in the pharyngeal process of the parotid gland. Sialogram direct projection is no longer needed.