System Design of a Non-invasive Photoacoustic Imaging System for Imaging Teeth

Atika Windra Sari, Mitrayana Mitrayana, Rini Widyaningrum, Andreas Setiawan

Abstract


Dental and oral health can impact overall health. Teeth can be damaged by inflammation of the soft tissue around them. Photoacoustic imaging was developed in the medical field to image biological materials. The aim of this study is to utilize a photoacoustic imaging system to image healthy and inflamed teeth. The radiation required is from an 808 nm diode laser. A condenser microphone serves as a detector. Samples are scanned using a mechanical XY-stage system. The research samples were extracted from teeth from Sprague-Dawley rats. Experimental animals were divided into two groups: healthy (R1) and inflammatory (R2). LabView on the computer reconstructs the acoustic signal into a grey level image. The results showed that the laser modulation frequency and duty cycle for imaging teeth were 13 kHz and 50%, respectively. Inflamed teeth have a higher grey level value (87.2±0.5) than healthy teeth (60.2±0.9). The normality test and statistical test of grey level values show significant differences between healthy and inflamed teeth. Based on the results, the photoacoustic imaging system was able to image healthy teeth as well as teeth affected by inflammation.

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DOI: https://doi.org/10.17509/wafi.v10i2.90699

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