论文信息 - Annular Array Transducer for Deep Acoustic Hyperthermia

Annular Array Transducer for Deep Acoustic Hyperthermia

In order to carry out an acoustic hyperthermic treatment of tumors at great depth (up to 120 mm) from the patient's skin, an equipment was implemented. The system arrangement consists of a phased annular array transducer operating at 400 kHz and associated electronic circuits. The most appropriate configuration of the array transducer was investigated. A PZT disc of 100 rnrn in diameter is used and the array is made of 14 concentric annular elements. The focal length is variable between 20 and 120 mm by driving the electronic circuits. Profiles of the focused ultrasound beam in water and in absorbing medium were determined for different operating conditions. Moreover an annular focusing was realized. The experimental and computed results are in very good agreement.

P. Hartemann | P. Hartemann | J. Do-Huu | J. P. Do-Huu

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