High speed photoacoustic tomography system with low cost portable pulsed diode laser
Photoacoustic tomography (PAT) is a potential hybrid imaging modality that has attracted great attention in the fields of medical imaging. In order to generate photoacoustic signal efficiently Q-switched Nd:YAG pump lasers capable of generating tens of millijoules of nanosecond laser pulses have b...
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| Main Authors: | , , |
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| Other Authors: | |
| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2015
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/93715 http://hdl.handle.net/10220/38387 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Photoacoustic tomography (PAT) is a potential hybrid imaging modality that has attracted great attention in the fields of
medical imaging. In order to generate photoacoustic signal efficiently Q-switched Nd:YAG pump lasers capable of
generating tens of millijoules of nanosecond laser pulses have been widely used. However, PAT systems using such
lasers have limitations in clinical applications because of their high cost, large size, and cooling requirements.
Furthermore, the low pulse repetition rate (PRR) of tens of hertz is not suitable for real-time PAT. So, there is a need for
inexpensive, compact, simple, fast imaging system for clinical applications. Nanosecond pulsed laser diodes could meet
these requirements. In this work, we present a high-speed photoacoustic tomography imaging system that uses a compact
and yet relatively powerful near-infrared pulsed laser diode. The PAT system was tested on phantoms to verify its
potential imaging speed. Photoacoustic reconstructed images at different scanning speeds are presented. With single
ultrasound detector scanning, the system could provide PA image ~10 times faster than the Nd:YAG laser based systems. |
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