[Zonographic study of pleural lesions due to asbestos dust].

Results of zonographic examination of the chest were compared with roentgenographic data in 34 patients with asbestos hyalinosis of different severity. The zonographic substrate of pleural hyalinosis are echo-poor intermediate spaces that are visualized bilaterally in different parts of the pleura. It was established that zonographic examination is more sensitive than roentgenography for revealing pleura hardening. Chest zonography is recommended to reveal of exclude pleura hyalinosis induced by asbestos in the absence of typical asbestos-induced changes on the pulmonary x-ray picture.