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Principles and Applications of Photoacoustic Computed Tomography
In this chapter we will introduce photoacoustic computed tomography (PACT). A brief history and rational for doing PACT. In section 2, we will describe the different types of PACT systems according to the ultrasound transducer used for imaging. Finally, we will discuss various applications of PACT for pre-clinical small animal imaging and clinical ...
Periyasamy, Vijitha +2 more
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Spatial resolution in photoacoustic computed tomography
Reports on Progress in Physics, 2021Abstract Photoacoustic computed tomography (PACT) is a novel biomedical imaging modality and has experienced fast developments in the past two decades. Spatial resolution is an important criterion to measure the imaging performance of a PACT system.
Chao Tian +4 more
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Spherical‐matching hyperbolic‐array photoacoustic computed tomography
Journal of Biophotonics, 2021AbstractLinear‐array photoacoustic computed tomography (LA‐PACT), for its flexibility and simplicity, has great potential in providing anatomical and functional information of tissues. However, the limited coverage view impedes the LA‐PACT obtaining high‐quality images.
Yihao Duan +4 more
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Dry coupling for whole-body small-animal photoacoustic computed tomography [PDF]
Journal of Biomedical Optics, 2017 We have enhanced photoacoustic computed tomography with dry acoustic coupling that eliminates water immersion anxiety and wrinkling of the animal and facilitates incorporating complementary modalities and procedures. The dry acoustic coupler is made of a
Lei Li, Lihong Wang, Liren Zhu
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Computational Compensation for Model Imperfections in Photoacoustic Computed Tomography
2023Photoacoustic computed tomography (PACT) images biological tissues’ optical absorption through detection of photon-absorption-induced ultrasonic waves. Various systems have been proposed for PACT and they are described by different mathematical models to reconstruct from detected ultrasonic signals the photon-absorption-induced initial pressure, the ...
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Imaging dichroism by photoacoustic computed tomography
2018Conventional photoacoustic computed tomography (PACT) images the spatial distribution of optical absorption, which is approximated as an isotropic optical property. The optical absorption of many biological tissues, however, is anisotropic. This anisotropy, known as dichroism or diattenuation, encodes rich information about molecular conformation and ...
Li, Lei +5 more
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Multi-Contrast Photoacoustic Computed Tomography
2019Imaging of small animals has played an indispensable role in preclinical research by providing high dimensional physiological, pathological, and phenotypic insights with clinical relevance. Yet pure optical imaging suffers from either shallow penetration (up to ~1–2 mm) or a poor depth-to-resolution ratio (~3), and non-optical techniques for whole-body
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Implicit neural representation for sparse-view photoacoustic computed tomography
UltrasonicsHigh-quality imaging in photoacoustic computed tomography (PACT) requires a high-channel count system for dense spatial sampling to avoid aliasing-related artifacts. To reduce system complexity, various image reconstruction approaches, such as model-based (MB) and deep learning based methods, have been explored to mitigate the artifacts associated with
Shaoqi Huang +9 more
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SwinIR for Photoacoustic Computed Tomography Artifact Reduction
2023 IEEE International Ultrasonics Symposium (IUS), 2023Varun Shijo +4 more
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