scholarly journals Parameterized Joint Reconstruction of the Initial Pressure and Sound Speed Distributions for Photoacoustic Computed Tomography

2018 ◽  
Vol 11 (2) ◽  
pp. 1560-1588 ◽  
Author(s):  
Thomas P. Matthews ◽  
Joemini Poudel ◽  
Lei Li ◽  
Lihong V. Wang ◽  
Mark A. Anastasio
Keyword(s):  
Computed Tomography ◽  
Sound Speed ◽  
Initial Pressure ◽  
Joint Reconstruction

scholarly journals Feature coupling photoacoustic computed tomography for joint reconstruction of initial pressure and sound speed in vivo

2019 ◽  
Vol 10 (7) ◽  
pp. 3447 ◽  
Author(s):  
Chuangjian Cai ◽  
Xuanhao Wang ◽  
Ke Si ◽  
Jun Qian ◽  
Jianwen Luo ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Sound Speed ◽  
Initial Pressure ◽  
Joint Reconstruction

scholarly journals Combating acoustic heterogeneity in photoacoustic computed tomography: A review

2020 ◽  
Vol 13 (03) ◽  
pp. 2030007 ◽  
Author(s):  
Tong Wang ◽  
Wen Liu ◽  
Chao Tian
Keyword(s):  
Computed Tomography ◽  
Sound Speed ◽  
Imaging Modality ◽  
Biological Tissues ◽  
Research Progress ◽  
Joint Reconstruction ◽  
Ultrasound Computed Tomography ◽  
Acoustic Inversion ◽  
Heterogeneity Correction ◽  
Imaging Performance

Based on the energy conversion of light into sound, photoacoustic computed tomography (PACT) is an emerging biomedical imaging modality and has unique applications in a range of biomedical fields. In PACT, image formation relies on a process called acoustic inversion from received photoacoustic signals. While most PACT systems perform this inversion with a basic assumption that biological tissues are acoustically homogeneous, the community gradually realizes that the intrinsic acoustic heterogeneity of tissues could pose distortions and artifacts to finally formed images. This paper surveys the most recent research progress on acoustic heterogeneity correction in PACT. Four major strategies are reviewed in detail, including half-time or partial-time reconstruction, autofocus reconstruction by optimizing sound speed maps, joint reconstruction of optical absorption and sound speed maps, and ultrasound computed tomography (USCT) enhanced reconstruction. The correction of acoustic heterogeneity helps improve the imaging performance of PACT.

Time domain reconstruction of sound speed and attenuation in ultrasound computed tomography using full wave inversiona)

2017 ◽  
Vol 141 (3) ◽  
pp. 1595-1604 ◽  
Author(s):  
M. Pérez-Liva ◽  
J. L. Herraiz ◽  
J. M. Udías ◽  
E. Miller ◽  
B. T. Cox ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Time Domain ◽  
Sound Speed ◽  
Full Wave ◽  
Ultrasound Computed Tomography

scholarly journals Breast Acoustic Parameter Reconstruction Method Based on Capacitive Micromachined Ultrasonic Transducer Array

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 963
Author(s):  
Yu Pei ◽  
Guojun Zhang ◽  
Yu Zhang ◽  
Wendong Zhang
Keyword(s):  
Computed Tomography ◽  
Time Reversal ◽  
Sound Speed ◽  
Ultrasonic Transducer ◽  
Reconstruction Method ◽  
Propagation Theory ◽  
Speed Distribution ◽  
Ultrasound Computed Tomography ◽  
Wide Range ◽  
Capacitive Micromachined Ultrasonic Transducer

Ultrasound computed tomography (USCT) systems based on capacitive micromachined ultrasonic transducer (CMUT) arrays have a wide range of application prospects. For this paper, a high-precision image reconstruction method based on the propagation path of ultrasound in breast tissue are designed for the CMUT ring array; that is, time-reversal algorithms and FBP algorithms are respectively used to reconstruct sound speed distribution and acoustic attenuation distribution. The feasibility of this reconstruction method is verified by numerical simulation and breast model experiments. According to reconstruction results, sound speed distribution reconstruction deviation can be reduced by 53.15% through a time-reversal algorithm based on wave propagation theory. The attenuation coefficient distribution reconstruction deviation can be reduced by 61.53% through FBP based on ray propagation theory. The research results in this paper will provide key technological support for a new generation of ultrasound computed tomography systems.

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