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- W4283761409 abstract "Photoacoustic computed tomography (PACT) is a fast-growing imaging modality. In PACT, the image quality is degraded due to the unknown distribution of the speed of sound (SoS). Emerging initial pressure (IP) and SoS joint-reconstruction methods promise reduced artifacts in PACT. However, previous joint-reconstruction methods have some deficiencies. A more effective method has promising prospects in preclinical applications.We propose a multi-segmented feature coupling (MSFC) method for SoS-IP joint reconstruction in PACT.In the proposed method, the ultrasound detectors were divided into multiple sub-arrays with each sub-array and its opposite counterpart considered to be a pair. The delay and sum algorithm was then used to reconstruct two images based on a subarray pair and estimated a direction-specific SoS, based on image correlation and the orientation of the subarrays. Once the data generated by all pairs of subarrays were processed, an image that was optimized in terms of minimal feature splitting in all directions was generated. Further, based on the direction-specific SoS, a model-based method was used to directly reconstruct the SoS distribution.Both phantom and animal experiments demonstrated feasibility and showed promising results compared with conventional methods, with less splitting and blurring and fewer distortions.The developed MSFC method shows promising results for both IP and SoS reconstruction. The MSFC method will help to optimize the image quality of PACT in clinical applications." @default.
- W4283761409 created "2022-07-02" @default.
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- W4283761409 date "2022-07-01" @default.
- W4283761409 modified "2023-09-30" @default.
- W4283761409 title "Multi-segmented feature coupling for jointly reconstructing initial pressure and speed of sound in photoacoustic computed tomography" @default.
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- W4283761409 doi "https://doi.org/10.1117/1.jbo.27.7.076001" @default.
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