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

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

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)
11 Downloads (Pure)

Abstract

In photoacoustic tomography (PAT) systems, the tangential resolution decreases due to the finite size of the transducer as the off-center distance increases. To address this problem, we propose a multi-angle detection approach in which the transducer used for data acquisition rotates around its center (with specific angles) as well as around the scanning center. The angles are calculated based on the central frequency and diameter of the transducer and the radius of the region-of-interest (ROI). Simulations with point-like absorbers (for point-spread-function evaluation) and a vasculature phantom (for quality assessment), and experiments with ten 0.5 mm-diameter pencil leads and a leaf skeleton phantom are used for evaluation of the proposed approach. The results show that a location-independent tangential resolution is achieved with 150 spatial sampling and central rotations with angles of ±8°/±16°. With further developments, the proposed detection strategy can replace the conventional detection (rotating a transducer around ROI) in PAT.

Original languageEnglish
Article number100373
JournalPhotoacoustics
Volume27
DOIs
Publication statusPublished - Sep 2022

Bibliographical note

Funding Information:
MP would like to acknowledge the support by the Tier 1 Grant funded by the Ministry of Education in Singapore ( RG30/21 , RT16/19 ).

Publisher Copyright:
© 2022 The Author(s)

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