Temperature Measurements in Tissue-Mimicking Material during HIFU Exposure

摘要: Cavitation in high intensity focused ultrasound (HIFU) procedures can yield unpredictable results, particularly when the same location is targeted for more than several seconds. To study this effect, temperature rise was measured tissue mimicking material (TMM) during HIFU exposures. A 50 um thin wire thermocouple (TC) embedded center of a hydrogel‐based TMM that previously developed applications. at 825 kHz TC junction. Thirty second exposures increasing pressure from 1–7 MPa were applied and decay after sonication recorded. B‐mode imaging used to monitor any cavitation activity sonication. If noted sonication, repeated level two times 20 minute intervals order characterize repeatability given had occurred. The threshold determined be approximately 3 kHz. Te...