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Proceedings Paper

Active palpation sensor for detecting prostatic cancer and hypertrophy
Author(s): Mami Tanaka; Mitsuyuki Furubayashi; Yoshikatsu Tanahashi; Seiji Chonan
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Paper Abstract

This paper is concerned with the development of an active palpation sensor for detecting the prostatic cancer and hypertrophy. The receptor of the sensor is a polyvinylidene fluoride (PVDF) film placed on the surface of a sponge rubber layer. It is mounted on a linear z-translation bar and inserted into the examinee's rectum being protected by a medical rubber glove. After positioned faced to the prostate gland, the sensor probe is driven sinusoidally at about 50Hz with peak-to-peak amplitude 2mm. The voltage signal from the PVDF film is integrated over the sampling period and used as the output of sensor for extracting the features of the collected data. The evaluation of stiffness by the sensor on 27 normal and unhealthy prostate glands are compared with the results of diagnosis by the doctor's palpation. It is shown that the output of sensor becomes greater with an increase of the stiffness of the prostate gland, which has good correlation with the doctor's evaluation on the stiffness. Further results on the laboratory test reconfirm that the present sensor well discriminates the stiffness of the prostate glands in vivo and non-invasively.

Paper Details

Date Published: 21 March 2001
PDF: 9 pages
Proc. SPIE 4235, Smart Structures and Devices, (21 March 2001); doi: 10.1117/12.420885
Show Author Affiliations
Mami Tanaka, Tohoku Univ. (Japan)
Mitsuyuki Furubayashi, Tohoku Univ. (Japan)
Yoshikatsu Tanahashi, Tohoku Kosai Hospital (Japan)
Seiji Chonan, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 4235:
Smart Structures and Devices
Dinesh K. Sood; Ronald Albert Lawes; Vasundara V. Varadan, Editor(s)

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