TY - JOUR
T1 - Multi-angle data acquisition to compensate transducer finite size in photoacoustic tomography
AU - Hakakzadeh, Soheil
AU - Mozaffarzadeh, Moein
AU - Mostafavi, Seyed Masood
AU - Kavehvash, Zahra
AU - Rajendran, Praveenbalaji
AU - Verweij, Martin
AU - de Jong, Nico
AU - Pramanik, Manojit
PY - 2022
Y1 - 2022
N2 - 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.
AB - 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.
KW - Artifacts reduction
KW - Finite transducer size
KW - Photoacoustic tomography
KW - Tangential resolution
KW - Virtual source
UR - http://www.scopus.com/inward/record.url?scp=85130805071&partnerID=8YFLogxK
U2 - 10.1016/j.pacs.2022.100373
DO - 10.1016/j.pacs.2022.100373
M3 - Article
AN - SCOPUS:85130805071
SN - 2213-5979
VL - 27
JO - Photoacoustics
JF - Photoacoustics
M1 - 100373
ER -