Photoacoustic signal enhancement: towards utilization of very low-cost laser diodes in photoacoustic imaging

2017 ◽  
Author(s):  
A. Hariri ◽  
M. Hosseinzadeh ◽  
Sh. Noei ◽  
M. R. Nasiriavanaki
Keyword(s):  
Photoacoustic Imaging ◽  
Low Cost ◽  
Laser Diodes ◽  
Photoacoustic Signal ◽  
Signal Enhancement

scholarly journals Photoacoustic Signal Enhancement: Towards Utilization of Low Energy Laser Diodes in Real-Time Photoacoustic Imaging

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3498 ◽  
Author(s):  
Rayyan Manwar ◽  
Matin Hosseinzadeh ◽  
Ali Hariri ◽  
Karl Kratkiewicz ◽  
Shahryar Noei ◽  
...  
Keyword(s):  
Photoacoustic Imaging ◽  
Signal To Noise Ratio ◽  
Laser Diodes ◽  
Cost Effective ◽  
Photoacoustic Signal ◽  
Low Energy ◽  
Low Snr ◽  
Energy Laser ◽  
Noisy Measurements ◽  
Low Energy Laser

In practice, photoacoustic (PA) waves generated with cost-effective and low-energy laser diodes, are weak and almost buried in noise. Reconstruction of an artifact-free PA image from noisy measurements requires an effective denoising technique. Averaging is widely used to increase the signal-to-noise ratio (SNR) of PA signals; however, it is time consuming and in the case of very low SNR signals, hundreds to thousands of data acquisition epochs are needed. In this study, we explored the feasibility of using an adaptive and time-efficient filtering method to improve the SNR of PA signals. Our results show that the proposed method increases the SNR of PA signals more efficiently and with much fewer acquisitions, compared to common averaging techniques. Consequently, PA imaging is conducted considerably faster.

scholarly journals Development of low-cost photoacoustic imaging systems using very low-energy pulsed laser diodes

2017 ◽  
Vol 22 (7) ◽  
pp. 075001 ◽  
Author(s):  
Ali Hariri ◽  
Afreen Fatima ◽  
Nafiseh Mohammadian ◽  
Sadreddin Mahmoodkalayeh ◽  
Mohammad Ali Ansari ◽  
...  
Keyword(s):  
Photoacoustic Imaging ◽  
Low Cost ◽  
Laser Diodes ◽  
Pulsed Laser ◽  
Low Energy ◽  
Imaging Systems

Reliability of 1300-nm spot-size converter integrated laser diodes for low-cost optical modules in access networks

1998 ◽  
Vol 16 (7) ◽  
pp. 1302-1307 ◽  
Author(s):  
H. Oohashi ◽  
M. Fukuda ◽  
Y. Kondo ◽  
N. Wada ◽  
Y. Tohmori ◽  
...  
Keyword(s):  
Low Cost ◽  
Laser Diodes ◽  
Spot Size ◽  
Access Networks

Photoacoustic signal enhancement at visible and X-ray wavelengths

1991 ◽  
Vol 52 (1) ◽  
pp. 8-13
Author(s):  
S. J. Isak ◽  
B. A. Garland ◽  
E. M. Eyring ◽  
J. P. Kirkland ◽  
R. A. Neiser
Keyword(s):  
Photoacoustic Signal ◽  
Signal Enhancement ◽  
X Ray

Communications: Ten billion bits on a disk: High-power laser diodes and pregrooved disks enable low-cost digital data recording and retrieval

IEEE Spectrum ◽  
1979 ◽  
Vol 16 (8) ◽  
pp. 26-33 ◽  
Author(s):  
Kees Bulthuis ◽  
Marino G. Carasso ◽  
Jaques P. J. Heemskerk ◽  
Peter J. Kivits ◽  
Wilhalm J. Kleuters ◽  
...  
Keyword(s):  
High Power ◽  
Low Cost ◽  
Laser Diodes ◽  
Digital Data ◽  
Data Recording ◽  
High Power Laser ◽  
Power Laser

LOW-COST DEVICE FOR C-SCAN PHOTOACOUSTIC IMAGING

2013 ◽  
Vol 134 (2) ◽  
pp. 1439
Author(s):  
Vikram S. Dogra ◽  
Navalgund A. H. K. Rao
Keyword(s):  
Photoacoustic Imaging ◽  
Low Cost

scholarly journals Photoacoustic imaging with low-cost sources; A review

2019 ◽  
Vol 14 ◽  
pp. 1-11 ◽  
Author(s):  
Mohsen Erfanzadeh ◽  
Quing Zhu
Keyword(s):  
Photoacoustic Imaging ◽  
Low Cost

scholarly journals Fabrication of Coaxial and Confocal Transducer Based on Sol-Gel Composite Material for Optical Resolution Photoacoustic Microscopy

Diagnostics ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 6
Author(s):  
Masayuki Tanabe ◽  
Tai Chieh Wu ◽  
Makiko Kobayashi ◽  
Che Hua Yang
Keyword(s):  
Ex Vivo ◽  
Photoacoustic Imaging ◽  
Sol Gel ◽  
Optical Resolution ◽  
Maximum Amplitude ◽  
Photoacoustic Signal ◽  
Center Frequency ◽  
Photoacoustic Microscopy ◽  
3 Dimensional ◽  
Pulse Echo

We have newly developed coaxial and confocal optical-resolution photoacoustic microscopy based on sol-gel composite materials. This transducer contains a concave-shaped piezoelectric layer with a focus depth of 5 mm and a hole with a diameter of 3 mm at the center to pass a laser beam into a phantom. Therefore, this system can directly detect an excited photoacoustic signal without prisms or acoustic lenses. We demonstrate the capability of the system through pulse-echo and photoacoustic imaging experiments. The center frequency of the fabricated transducer is approximately 7 MHz, and its relative bandwidth is 86%. An ex-vivo experiment is conducted, and photoacoustic signals are clearly obtained. As a result, 2- and 3-dimensional maximum amplitude projection images are reconstructed.

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