Fast full-view photoacoustic imaging by combined scanning with a linear transducer array

Area of Science:

• Biomedical Engineering
• Medical Imaging
• Optics and Photonics

Background:

• Photoacoustic imaging (PAI) offers high resolution and contrast for visualizing biological tissues.
• Traditional PAI systems can be limited by slow scanning speeds or restricted field of view.
• Developing faster, full-view PAI systems is crucial for clinical applications and detailed biological studies.

Purpose of the Study:

• To develop and evaluate a fast, full-view photoacoustic imaging system.
• To enhance the visualization of complex tissue structures and biological networks.
• To demonstrate the system's capability in imaging both phantoms and in vivo biological samples.

Main Methods:

• Utilized a 128-element linear transducer array for photoacoustic signal detection.
• Implemented a combined scanning approach integrating electronic and mechanical scanning.
• Applied an improved limited-field filtered back-projection algorithm with directivity factors for image reconstruction.

Main Results:

• Achieved clear visualization of object boundaries and intricate structures.
• Successfully imaged the blood vessel network in a rat brain in vivo.
• Demonstrated the system's capability to capture complex anatomical details with high fidelity.

Conclusions:

• The developed fast, full-view photoacoustic imaging system enables efficient visualization of complex biological structures.
• The combined scanning technique and advanced reconstruction algorithm improve imaging performance.
• This system holds potential for advanced biomedical research and diagnostic imaging.