TY - GEN
T1 - Rotational Dove prism scanning dual angle Doppler OCT
AU - Blatter, Cedric
AU - Coquoz, Sëverine
AU - Grajciar, Branislav
AU - Singh, Amardeep S.G.
AU - Werkmeister, Renë M.
AU - Schmetterer, Leopold
AU - Leitgeb, Rainer A.
PY - 2013
Y1 - 2013
N2 - Traditional Doppler OCT is highly sensitive to motion artifacts due to the dependence on the Doppler angle. This limits its reproducibility in clinical practice. To overcome this limitation, we use a bidirectional technique with a novel rotating scanning scheme. The volume is probed simultaneously from two distinct illumination directions with variable controlled orientations, allowing reconstruction of the true flow velocity, independently of the vessel orientation. A Dove prism in the sample arm permits a rotation of the illumination directions that can be synchronized with the standard beam steering device. The principle is implemented with Swept Source OCT at 1060nm with 100,000 A-Scans/s. We apply the system to human retinal absolute blood velocity measurement by performing segment and circumpapillary time series scans around the optic nerve head. We also demonstrate microvasculature imaging by calculation of squared intensity differences between successive tomograms.
AB - Traditional Doppler OCT is highly sensitive to motion artifacts due to the dependence on the Doppler angle. This limits its reproducibility in clinical practice. To overcome this limitation, we use a bidirectional technique with a novel rotating scanning scheme. The volume is probed simultaneously from two distinct illumination directions with variable controlled orientations, allowing reconstruction of the true flow velocity, independently of the vessel orientation. A Dove prism in the sample arm permits a rotation of the illumination directions that can be synchronized with the standard beam steering device. The principle is implemented with Swept Source OCT at 1060nm with 100,000 A-Scans/s. We apply the system to human retinal absolute blood velocity measurement by performing segment and circumpapillary time series scans around the optic nerve head. We also demonstrate microvasculature imaging by calculation of squared intensity differences between successive tomograms.
KW - Absolute blood flow velocity
KW - Doppler OCT
KW - human retina
KW - non-invasive angiography
KW - Swept Source
UR - http://www.scopus.com/inward/record.url?scp=84877842956&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84877842956&partnerID=8YFLogxK
U2 - 10.1117/12.2006242
DO - 10.1117/12.2006242
M3 - Conference contribution
AN - SCOPUS:84877842956
SN - 9780819493408
T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
BT - Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII
T2 - Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVII
Y2 - 4 February 2013 through 6 February 2013
ER -
