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- W4376279923 abstract "In photoacoustic computed tomography (PACT), the finite aperture effect is often characterized as a tangential resolution that increases proportionally with the distance from the rotation center. However, this conclusion is based on the inaccurate point-detector assumption used in image reconstruction. In this study, we appropriately modeled the finite size of the acoustic detector in the back-projection (BP) based image reconstruction to improve the accuracy of the time delay calculation and systematically investigated its effects. Our results showed that the main effect of the finite aperture size is the creation of a limited high-quality imaging region (HQIR) around the scanning center, due to the directional sensitivity of the detector. We also demonstrated that the finite aperture effect can reduce the optimal number of detectors required for spatial anti-aliasing. These new findings provide novel perspectives for optimizing PACT systems and corresponding reconstruction methods." @default.
- W4376279923 created "2023-05-13" @default.
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- W4376279923 date "2023-08-01" @default.
- W4376279923 modified "2023-10-17" @default.
- W4376279923 title "The influences of finite aperture size in photoacoustic computed tomography" @default.
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- W4376279923 doi "https://doi.org/10.1016/j.ultras.2023.107042" @default.
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