Title :
Study on diagnosis for tooth using millimeter-waves
Author :
Hoshi, N. ; Nikawa, Y. ; Kawai, K. ; Ebisu, S.
Author_Institution :
Sch. of Electr. Eng., Nat. Defense Acad., Yokosuka, Japan
Abstract :
This paper presents applications of millimeter-waves for the characterization of teeth. This is done by measuring the complex permittivity over the frequency range from 0.04 to 40 GHz. These measurements have revealed that dental caries are significantly more lossy to microwaves and millimeter-waves than healthy tooth, and this difference can be used for dental diagnosis. The experimental results have been confirmed by using the Finite Difference Time Domain (FDTD) method at 35 GHz. In addition, higher frequency experiments have revealed that higher resolution for dental caries is possible by using a smaller applicator. It is concluded that millimeter-waves can be used for dental medical diagnosis.
Keywords :
bioelectric phenomena; microwave measurement; millimetre waves; patient diagnosis; permittivity measurement; 0.04 to 40 GHz; complex permittivity; dental caries; finite difference time domain method; medical diagnostic technique; millimeter-waves; teeth characterization; tooth; Dentistry; Finite difference methods; Frequency measurement; Loss measurement; Microwave measurements; Millimeter wave measurements; Millimeter wave technology; Permittivity measurement; Teeth; Time domain analysis;
Conference_Titel :
Microwave Symposium Digest, 1998 IEEE MTT-S International
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-4471-5
DOI :
10.1109/MWSYM.1998.705101
