Abstract: |
A novel ultrasonic therapy system dedicated to the breast cancer treatment is presented. Optimized based on a 3-D bio-heat transfer simulation, the applicator is a cylinder comprised of a stack of rings. Up to 48 transducers are mounted on the inside of each ring. Arranged alternately,these transducers operate in one of two frequency-bands(1.8-2.8 MHz and 4.3-4.8 MHz). During treatment the patient is in prone position, with the breast immersed in water and surrounded by the array of rings. Experiments with a phantom demonstrated the device's excellent capability to achieve and maintain a uniform temperature distribution (41.5-44°C) in a desired region. © 1999 Chin. Phys. Soc. |