Point spread function modeling for photoacoustic tomography - I: three-dimensional detection geometries.

Area of Science:

• Biomedical Imaging
• Medical Physics
• Acoustic Imaging

Background:

• Photoacoustic computed tomography (PACT) is a developing noninvasive biomedical imaging technique.
• Acoustic detector arrays are crucial for PACT performance.
• Understanding detection geometry's impact is key for optimizing PACT systems.

Purpose of the Study:

• To investigate the influence of detection geometry on image quality in PACT.
• To model the point spread function (PSF) for different detector configurations.
• To provide insights for selecting optimal detector arrays for PACT.

Main Methods:

• Point spread function (PSF) modeling was employed.
• Back-projection image reconstruction was used as the basis for analysis.
• Three 3D detection geometries (spherical, cylindrical, planar) were evaluated.

Main Results:

• The study analyzed the effect of detector geometry on PACT image quality.
• The impact of detector bandwidth and aperture on PSF was assessed for each geometry.
• Performance differences between spherical, cylindrical, and planar arrays were quantified.

Conclusions:

• Detection geometry significantly affects PACT image quality.
• The findings offer a tool for evaluating acoustic detector arrays.
• This research aids in the practical design and selection of detector arrays for PACT applications.