[Characteristics of the formation of local destructive foci in brain tissues exposed to focused ultrasound].
Local lesions produced in the different brain structures by focused ultrasound were investigated. It was revealed that the blood flow volume velocity had a considerable influence on temperature distribution in the focal area and on the threshold doses and lesion dimensions. Calculation of the lesion diameters on the basis of a purely heat model shows rather good accordance with the experimental data for the large hemispherical cortex and thalamic nuclei with a sufficiently long radiation time. A correlation was found between the subharmonic component of cavitation noise and appearance of the cavities, ruptures, and local hemorrhages located mainly on the boundaries between different cerebral tissues.
D000818:Animals; D001783:Blood Flow Velocity; D001921:Brain / Q000473:pathology; D001930:Brain Injuries / Q000209:etiology* / Q000473:pathology; D002560:Cerebrovascular Circulation; D008433:Mathematics; D011817:Rabbits; D013696:Temperature; D014465:Ultrasonics / Q000009:adverse effects*
Nekotorye osobennosti formirovaniia lokal'nykh ochagov razrusheniia v tkaniakh golovnogo mozga pri deĭstvii fokusirovannogo ul'trazvuka.