TY - GEN
T1 - 3D photoacoustic imaging using staring, sparse array with 60 transducers
AU - Roumeliotis, Michael B.
AU - Kosik, Ivan
AU - Carson, Jeffrey J.L.
PY - 2012
Y1 - 2012
N2 - Photoacoustic imaging is a hybrid imaging modality capable of producing images based on optical contrast, but with depth penetration and resolution similar to ultrasound imaging. In this work, a staring, sparse approach to 3D photoacoustic imaging was used to image a number of objects. The photoacoustic system described in this paper improved upon a previous generation that contained 30 commercial transducers, by incorporating 60 custom-built transducers into a compact hemispherical array. Imaging was performed by acquiring an experimental estimate of the imaging operator and solving a linear system model to provide an estimate of the object. The imaging operator contained 18,000 voxels, each at 0.5-mm isotropic resolution. The dimensions of the imaging operator were 30 mm × 30 mm × 2.5 mm. In the first experiment, a black wire was arranged in a triangular shape and imaged in a 0.3% Intralipid™ solution. The second experiment utilized a rotating human hair, where the hair was imaged at different angular positions. Both objects were successfully captured with reasonable accuracy, though image artifacts were present in both sets of images. The experimental results demonstrated that objects of substantial geometrical complexity could be reconstructed using measurements from only 60 transducers with prior knowledge of the imaging operator.
AB - Photoacoustic imaging is a hybrid imaging modality capable of producing images based on optical contrast, but with depth penetration and resolution similar to ultrasound imaging. In this work, a staring, sparse approach to 3D photoacoustic imaging was used to image a number of objects. The photoacoustic system described in this paper improved upon a previous generation that contained 30 commercial transducers, by incorporating 60 custom-built transducers into a compact hemispherical array. Imaging was performed by acquiring an experimental estimate of the imaging operator and solving a linear system model to provide an estimate of the object. The imaging operator contained 18,000 voxels, each at 0.5-mm isotropic resolution. The dimensions of the imaging operator were 30 mm × 30 mm × 2.5 mm. In the first experiment, a black wire was arranged in a triangular shape and imaged in a 0.3% Intralipid™ solution. The second experiment utilized a rotating human hair, where the hair was imaged at different angular positions. Both objects were successfully captured with reasonable accuracy, though image artifacts were present in both sets of images. The experimental results demonstrated that objects of substantial geometrical complexity could be reconstructed using measurements from only 60 transducers with prior knowledge of the imaging operator.
KW - Photoacoustic imaging
KW - Staring array
KW - Three-dimensional
UR - http://www.scopus.com/inward/record.url?scp=84859311031&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84859311031&partnerID=8YFLogxK
U2 - 10.1117/12.908841
DO - 10.1117/12.908841
M3 - Conference contribution
AN - SCOPUS:84859311031
SN - 9780819488664
T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
BT - Photons Plus Ultrasound
T2 - Photons Plus Ultrasound: Imaging and Sensing 2012
Y2 - 22 January 2012 through 24 January 2012
ER -