Multi-angle data acquisition to compensate transducer finite size in photoacoustic tomography

Hakakzadeh, Soheil; Mozaffarzadeh, Moein; Mostafavi, Seyed Masood; Kavehvash, Zahra; Rajendran, Praveenbalaji; Verweij, Martin D.; Jong, Nico de; Pramanik, Manojit

doi:10.1016/j.pacs.2022.100373

Cited by 15 publications

(4 citation statements)

References 46 publications

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“…Instead of using a single angle transducer used in other works like [46,47] , we employ three transducers, each covering a specific imaging area within the ring. The transducers are tilted at calculated angles based on the ring radius and radial size of the FOV [41]:…”

Section: Methodsmentioning

confidence: 99%

“…A commonly made assumption is that the ultrasound (US) transducer acts as a point transducer, capturing PA signals from a broad range of angles, essentially implying an unlimited field of view (FOV). This assumption leads to the misconception that the axial or tangential resolution remains unaffected by the specific imaging location, which, in reality, is an inaccurate assumption [41]. To tackle this issue, previous methods have been developed to improve the tangential resolution and ensure its consistency within the region of interest.…”

Section: Introductionmentioning

confidence: 99%

“…This *avanaki@uic.edu; phone 312-413-5528; opira-avanaki.com/ enhancement was achieved through the utilization of a negative acoustic lens, resulting in a substantial improvement in tangential resolution by more than two times in both thermoacoustic and photoacoustic tomography. Nevertheless, this approach comes with drawbacks, such as decreased sensitivity and reduced image quality in reconstructed images due to acoustic mismatch and challenges in production, arising from differences in sound speed between the lens and the imaging medium [41].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Photoacoustic computed tomography with improved quality

Ranjbaran,

Zafar,

Saint-Martin

et al. 2024

Photons Plus Ultrasound: Imaging and Sensing 2024

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This paper introduces an innovative approach to enhance the circular scanning-based photoacoustic tomography (CS-PAT) system for photoacoustic imaging. The proposed method involves using a circular detection geometry with three carefully placed ultrasound transducers (USTs). By strategically selecting the angles of the USTs, the field of view (FOV) is expanded, and tangential resolution is improved without requiring additional imaging time. The new CS-PAT system demonstrates practicality and convenience, providing higher signal-to-noise ratio and better structural similarity compared to the conventional system. This approach overcomes the limitations of the limited size of USTs and widens the application potential of CS-PAT in a straightforward and efficient manner.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Photoacoustic computed tomography with improved quality

Ranjbaran,

Zafar,

Saint-Martin

et al. 2024

Photons Plus Ultrasound: Imaging and Sensing 2024

View full text Add to dashboard Cite

show abstract

“…Because the transducer could only partially enclose the ovarian tissue. To address the problem, Huang placed an acoustic reflector to enlarge the detection angle [1], Hakakzadeh adopted a rotate ring to achieve multiple scanning views via a linear transducer [2], Guan designed a pixel-wised machine learning model to recover the limited view PAT reconstructions [3].…”

Section: Introductionmentioning

confidence: 99%

Machine learning method for limited view 3D PAT reconstruction with curved array

Zou¹,

Lin²,

Kou³

et al. 2023

Photons Plus Ultrasound: Imaging and Sensing 2023

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Photoacoustic tomography (PAT) is a valuable tool in characterizing ovarian lesions for accurate diagnosis. However, limited view problem degrades the quality of PAT reconstruction severely, especially for transvaginal transducer which only partially encloses the target. To address this issue, we compensated limited view information loss by co-registered PAT and US machine learning method. The simulation and phantom results showed that the details of the target were recovered by proposed method, compared with delay-and-sum reconstruction method.

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A practical solution to improve the field of view in circular scanning‐based photoacoustic tomography

Ranjbaran,

Zafar,

Saint‐Martin

et al. 2024

Journal of Biophotonics

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One of the primary challenges in ring single‐element photoacoustic tomography systems is the low image quality in areas away from the center of the ring. This is mainly due to the limited field of view (FOV) of each transducer, which in turn reduces the imaging FOV. To address this shortcoming, we have put forward a practical and straightforward solution to enhance the FOV of circular scanning‐based photoacoustic tomography (CS‐PAT). This is accomplished by placing transducers at different angles instead of using a single transducer placed at a normal angle to the imaging target. We also modified the ring scanner inner wall surface to significantly reduce photoacoustic reverberation. By imaging several phantoms, we show a significant improvement in the images generated by our system imaging from 4.1 to over 7 for the signal‐to‐noise ratio and structural similarity index increased from 41% to 70%.

show abstract

Multi-angle data acquisition to compensate transducer finite size in photoacoustic tomography

Cited by 15 publications

References 46 publications

Photoacoustic computed tomography with improved quality

Photoacoustic computed tomography with improved quality

Machine learning method for limited view 3D PAT reconstruction with curved array

A practical solution to improve the field of view in circular scanning‐based photoacoustic tomography

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