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The heated metal needle used for tumor thermotherapy is considered crucial for enhancing the practicality of cauterization using electromagnetic induction-heating techniques. In this study, a novel coil capable of producing a deep magnetic field is designed. In the proposed design, the coil structure is improved to enhance the intensity of the coil’s deep magnetic field and its suitability for deep-tissue cauterization. Furthermore, a series of experiments are conducted using a single and consistent input current. The heating experiments are conducted at varying depths by placing the needle beneath the coil. The proposed coil significantly increases the induction-heating temperature and provides a solution to the long-standing problem of insufficient needle temperature. This research has also improved the usability of the induction-heating equipment in the field of deep tumor ablation.

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A reusable miniature silicon sensor for prostate-specific antigen (PSA) is implemented. A micro-machined cantilever beam is fabricated as the basis of this sensor by photo-lithography. An 8-bit successive approximation analog-to-digital converter (SAR ADC) and an on-off-keying digital wireless transmitter are integrated to enable wireless data transmission. The detectable PSA solution ranges from 0.1 ug/ml to 200 ug/ml. Wireless interface is fabricated with TSMC 0.35 um 2P4M CMOS technology.Index Terms -prostate-specific antigen, cantilever beam, on-off-keying, successive approximation, analog-to-digital converter, position-sensitive detector.