TY - GEN
T1 - Comparison of Flexible Array with Laparoscopic Transducer for Photoacoustic-Guided Surgery
AU - Zhang, Jiaxin
AU - Wiacek, Alycen
AU - Feng, Ziwei
AU - Ding, Kai
AU - Lediju Bell, Muyinatu A.
N1 - Funding Information:
This work was supported by NSF CAREER Award ECCS-1751522.
Publisher Copyright:
© 2023 SPIE.
PY - 2023
Y1 - 2023
N2 - Photoacoustic imaging has recently demonstrated strong viability to visualize tool tips and assist with guidance during surgeries and interventional procedures. The more conventional rigid ultrasound transducers that can be used to sense photoacoustic signals require applied pressure for complete tissue contact when placed on curved surfaces. However, emerging flexible arrays are better suited to conform to different anatomical geometries. This work presents photoacoustic images acquired with a conventional laparoscopic transducer and a more flexible transducer array when placed in contact with surfaces of different curvatures, providing quantitative comparisons of image quality and transducer characterization. An optical fiber was inserted and translated within hemispherical phantoms along each transducer’s elevation dimension to estimate the corresponding elevation field-of-view (FOV). A wider elevation FOV was measured with the flexible array, which indicates decreased elevation localization certainty, but increased ability to find tool tips when compared to the laparascopic probe. The average target depth accuracy was 99.36% with the flexible array and 95.05% with the laparoscopic probe, due to the differences in pressure required to maintain acoustic contact. Image contrast and signal-to-noise ratios were greater with the flexible array than with the laparoscopic probe. These properties of the flexible array enhance its desirability for photoacoustic-guided surgical interventions.
AB - Photoacoustic imaging has recently demonstrated strong viability to visualize tool tips and assist with guidance during surgeries and interventional procedures. The more conventional rigid ultrasound transducers that can be used to sense photoacoustic signals require applied pressure for complete tissue contact when placed on curved surfaces. However, emerging flexible arrays are better suited to conform to different anatomical geometries. This work presents photoacoustic images acquired with a conventional laparoscopic transducer and a more flexible transducer array when placed in contact with surfaces of different curvatures, providing quantitative comparisons of image quality and transducer characterization. An optical fiber was inserted and translated within hemispherical phantoms along each transducer’s elevation dimension to estimate the corresponding elevation field-of-view (FOV). A wider elevation FOV was measured with the flexible array, which indicates decreased elevation localization certainty, but increased ability to find tool tips when compared to the laparascopic probe. The average target depth accuracy was 99.36% with the flexible array and 95.05% with the laparoscopic probe, due to the differences in pressure required to maintain acoustic contact. Image contrast and signal-to-noise ratios were greater with the flexible array than with the laparoscopic probe. These properties of the flexible array enhance its desirability for photoacoustic-guided surgical interventions.
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U2 - 10.1117/12.2656173
DO - 10.1117/12.2656173
M3 - Conference contribution
AN - SCOPUS:85159018845
T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
BT - Photons Plus Ultrasound
A2 - Oraevsky, Alexander A.
A2 - Wang, Lihong V.
PB - SPIE
T2 - Photons Plus Ultrasound: Imaging and Sensing 2023
Y2 - 29 January 2023 through 1 February 2023
ER -