Parallel acoustic delay lines for photoacoustic tomography.

Area of Science:

• Biomedical Optics
• Acoustic Imaging
• Medical Diagnostics

Background:

• Real-time photoacoustic tomography typically demands complex multi-element transducer arrays and extensive data acquisition electronics.
• Simultaneous reception of photoacoustic waves is a bottleneck in current systems, increasing cost and complexity.

Purpose of the Study:

• To demonstrate a novel photoacoustic tomography (PAT) system utilizing optical fiber-based parallel acoustic delay lines (PADLs).
• To enable serial processing of photoacoustic signals using a single transducer and single-channel data acquisition electronics.

Main Methods:

• Implementation of parallel acoustic delay lines (PADLs) to introduce controlled time delays to photoacoustic (PA) signals.
• Utilizing a single-element ultrasonic transducer for serial reception of time-delayed PA signals.
• Processing of delayed signals using single-channel data acquisition electronics.

Main Results:

• Successful photoacoustic imaging of an optically absorbing target within an optically scattering medium.
• Demonstration of the PADL-based PAT system's capability to acquire and process PA signals serially.
• Validation of the concept for simplified data acquisition in photoacoustic tomography.

Conclusions:

• The developed PADL-based PAT system offers a viable alternative to complex multi-element arrays.
• This approach has the potential to significantly reduce the cost and complexity of photoacoustic tomography systems.
• Further development could pave the way for more accessible and widespread application of PAT.