The Influence of Diode Laser Intensity Modulation on Photoacoustic Image Quality for Oral Soft Tissue Imaging

Widyaningrum, Rini; Mitrayana, Mitrayana; Gracea, Rellyca Sola; Agustina, Dewi; Mudjosemedi, Munakhir; Silalahi, Harry Miyosi

doi:10.34172/jlms.2020.s15

Cited by 6 publications

(18 citation statements)

References 40 publications

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“…Details on the PAI system are described in our previous works. 19,20 The study flowchart is presented in Figure 3. The samples were exposed to the laser at various frequencies (17,18,19, and 20 kHz) and duty cycles (10%, 20%, 30%, 40%, and 50%) to determine the optimal laser modulation for periodontal tissue imaging.…”

Section: Methodsmentioning

confidence: 99%

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Photoacoustic Imaging for Periodontal Disease Examination

2022

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Introduction: After caries, periodontal tissue inflammation (periodontitis) is the most common oral health problem. Photoacoustic imaging (PAI) is a new technique that uses simple components such as a diode laser and a condenser microphone. This study aimed to evaluate the performance of a simple PAI system in periodontal disease imaging by using an animal model. Methods: Normal periodontal and periodontitis tissues were obtained from Sprague–Dawley rats categorized as the control group, treatment group 1 (7 days of periodontitis induction), treatment group 2 (11 days of periodontitis induction), and treatment group 3 (14 days of periodontitis induction). The PAI system was controlled by LabVIEW and Arduino IDE software from a personal computer. Results: Results revealed that the optimal frequency of laser modulation for periodontal tissue imaging was 19 kHz with a duty cycle of 50%. The photoacoustic (PA) intensity of periodontal tissues was −68.71 dB for treatment group 3, −70.34 dB for treatment group 2, −71.69 dB for treatment group 1, and −73.07 dB for the control group. PA image analysis showed that the PA intensity from periodontal disease groups was higher than the control group. Conclusion: This study indicates the feasibility of using a simple PAI system to differentiate normal periodontal tissues from periodontitis tissues.

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Section: Methodsmentioning

confidence: 99%

“…High PA intensity was displayed as red in the PA image, medium PA intensity as yellow, and low PA intensity as blue. 19,20…”

Section: Methodsmentioning

confidence: 99%

Photoacoustic Imaging for Periodontal Disease Examination

2022

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“…Sinyal akustik diperkuat menggunakan sound card UMC202 kemudian diolah menjadi citra fotoakustik menggunakan komputer. Sistem pencitraan fotoakustik yang digunakan pada penelitian ini telah dijelaskan secara lebih spesifik pada penelitian kami sebelumnya [26] .…”

Section: Metodeunclassified

“…Warna pada citra fotoakustik (Gambar 11) menunjukkan rentang nilai taraf intensitas akustik. Merah menunjukkan taraf intensitas akustik (TI) tertinggi, biru merupakan taraf intensitas akustik (TI) paling rendah dan kuning mewakilkan taraf intensitas akustik (TI) sedang [26] . Gambar 11 menunjukkan hal tersebut, pada citra fotoakustik setiap sampel terlihat warna yang berbeda berdasarkan taraf intensitas akustiknya (TI).…”

Section: Hasil Citra Jaringan Biologis Dengan Agen Kontrasunclassified

Pengaruh Pemberian Agen Kontras Pewarna Sintetik pada Jaringan Biologis terhadap Hasil Pencitraan Fotoakustik

Janna

Mitrayana

Widyaningrum

2022

Indonesian J Appl Phys

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An experiment to investigate the influence of synthetic dye contrast agent in photoacoustic imaging of biological tissue was conducted in this study. This study uses a simple phocoacoustic imaging system consists of three main components, i.e., a diode laser, condenser microphone, and a custom-build X-Y stage. Characterization was performed on the main components of the system to obtain the appropriate settings on imaging the biological tissue in this study. The results of the optimal frequency and duty cycle for laser modulation in this study were 19000 Hz and duty cyle of 40%, respectively. The addition of a contrast agent aims to improve the quality of the image by comparing the sample with methylene blue contrast agent, the sample with methyl red and the sample without contrast agent. The increases of acoustic intensity level is in proportion with the contrast agent concentration. The difference in the photoacoustic images reveal that the sample with methylene blue contrast agent has the highest acoustic intensity level compared to both sample with methyl red contrast agent and the sample without contrast agent. Therefore, this research proves that a photoacoustic imaging system can be developed to image biological tissue with a contrast agent and methylene blue has greater potential than methyl red to be used as a contrast agent in photoacoustic imaging.

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“…However, pulsed lasers and ultrasound transducers are very costly and difficult to be duplicated, as they employ complicated signal acquisition systems. The previous study reveals that a simple PAI system can be built by utilizing an intensity-modulation continues-wave diode laser combined with a condenser microphone [12] [13] [14]. The transferred light energy reacts with a target tissue by transmission, reflection, scattering, and absorption [15].…”

Section: Introductionmentioning

confidence: 99%

Photoacoustic Imaging System based on Diode Laser and Condenser Microphone for Characterization of Dental Anatomy

Alifkalaila¹,

Mitrayana²,

Widyaningrum³

2021

International Journal on Advanced Science, Engineering and Information Technology

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The feasibility of a diode laser and condenser microphone-based photoacoustic imaging system for dental anatomy characterization has been investigated. The sample of this study was human teeth illuminated by a diode laser with a wavelength of 532 nm. The laser and detector were fixed in a static position while the sample was moved in the X-Y direction. A laser diode illuminated the sample at 17-20 kHz frequencies combined with 30%, 35%, 40%, 45%, 50%, and 55% of the duty cycles to investigate optimal laser irradiation for dental anatomy imaging. The acoustic intensity was measured ten times to investigate the characterization of dental anatomical structure, i.e., enamel, dentin, and pulp. The sample was then scanned using the system to determine the characterization of the dental structure in the photoacoustic image. The results of this study reveal that the optimal frequency and duty cycle of laser exposure to produce the photoacoustic image of the sample are 19 kHz and 50%, respectively. The maximum acoustic intensities of enamel, dentin and pulp are -71,8 dB, -70,8 dB, -70,5 dB, respectively. Whereas the minimum acoustic intensities of enamel, dentin and pulp are -72,0 dB, -70,9 dB, -70,6 dB respectively. In this study, a photoacoustic imaging system based on a diode laser and a condenser microphone can generate photoacoustic images of dental anatomical structures. The optical absorption of pulp is stronger than the dentin and enamel layer. Hence the pulp area emits the highest acoustic intensity and emerges as a red area in the photoacoustic image.

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The Influence of Diode Laser Intensity Modulation on Photoacoustic Image Quality for Oral Soft Tissue Imaging

Cited by 6 publications

References 40 publications

Photoacoustic Imaging for Periodontal Disease Examination

Photoacoustic Imaging for Periodontal Disease Examination

Pengaruh Pemberian Agen Kontras Pewarna Sintetik pada Jaringan Biologis terhadap Hasil Pencitraan Fotoakustik

Photoacoustic Imaging System based on Diode Laser and Condenser Microphone for Characterization of Dental Anatomy

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