Spatial variations in prostate tissue histology as measured by a tactile resonance sensor.

Spatial variations in prostate tissue histology as measured by a tactile resonance sensor. Research Abstract Details 

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Spatial variations in prostate tissue histology as measured by a tactile resonance sensor. Abstract Text:

Ville Jalkanen,Britt M Andersson,Anders Bergh, Ljungberg,Olof A Lindahl,Ville Jalkanen,Britt M Andersson,Anders Bergh, Ljungberg,Olof A Lindahl,

In recent years, tactile sensors based on piezoelectric resonance sensor technology have been used for medical diagnosis where the sensor's stiffness-measuring properties can reflect tissue pathology. The change in the frequency of the resonating system and the change in force when contact is made with tissue are used as a stiffness parameter. Earlier stiffness measurements of prostate tissue in vitro demonstrate variations related to tissue composition. In this study, measured stiffness from two human prostate specimens was compared to histological composition of prostate tissue below and around the measurement points. Tissue stiffness was measured with the resonance sensor system. Tissue composition was measured at four different depths in the tissue specimen using a microscopic-image-based morphometrical method. With this method, the proportion of tissue types was determined at the points of intersections in a circular grid on the images representing each measurement point. Numerical values were used for weighting the tissue proportions at different depths in the tissue specimen. For an impression depth of 1.0 mm, the sensing depth in this study was estimated to be 3.5-5.5 mm. Stiffness variations due to horizontal tissue variations were investigated by studying the dependence of the size of the circular grid area relative to the contact area of the sensor tip. The sensing area (grid radius) was estimated to be larger than the contact area (contact radius) between the sensor tip and the tissue. Thus, the sensor tip registers spatial variations in prostate tissue histology, both directly below and lateral to the tip itself. These findings indicate that tumours around the sensor tip could be detected, which in turn supports the idea of a future resonance-sensor-based clinical device for detecting tumours and for guiding biopsies.

Spatial variations in prostate tissue histology as measured by a tactile resonance sensor. Publishing Authors By Initials

V Jalkanen,BM Andersson,A Bergh,B Ljungberg,OA Lindahl,V Jalkanen,BM Andersson,A Bergh,B Ljungberg,OA Lindahl,

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Spatial variations in prostate tissue histology as measured by a tactile resonance sensor. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Physiological measurement

VOLUME: 28

Page Numbers: 1267-81

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ISSN: 0967-3334

DAY: 28

MONTH: 09

YEAR: 2007

Spatial variations in prostate tissue histology as measured by a tactile resonance sensor. Information

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LANGUAGE: eng

NlmUniqueID: 9306921

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Grant and Affiliation Information for Spatial variations in prostate tissue histology as measured by a tactile resonance sensor.

AFFILIATION: Department of Applied Physics and Electronics, Umeå University, SE-90187 Umeå, Sweden. ville.jalkanen@tfe.umu.se

Country: England

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MEDLINETA: Physiol Meas

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