Analysis and testing of a concentric ring applicator for ultrasound hyperthermia with clinical results
作者： T. P. Ryan , A. Hartov , T. A. Colacchio , C. T. Coughlin , J. H. Stafford
DOI: 10.3109/02656739109034971
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摘要: A planar ultrasound transducer was modified by etching concentric circles on one surface of a piezoelectric ceramic to create four rings. The 10 cm diameter had active rings and an unenergized centre. housing designed be completely immersed in fluid, suitable for intraoperative hyperthermia. resonant at 1.0 MHz tested water tank acoustic absorbing medium where the steady-state temperatures were measured. comparison between single element ring modification with all equal power density showed performance nearly identical. In vivo experiments canine thigh verified phantom predictions as individual energized. Theoretical intensity calculations made compared favourably test results. Clinical hyperthermia treatments chest wall head neck tumours that temperature distribution could highly adjusting t...
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