Abstract

In order to achieve computationally efficient mirror image rejection during the off-pivot, full-range approach in spectral-domain optical coherence tomography, we used a vestigial sideband (VSB) filter in place of a Hilbert transform. The appropriate choice of the VSB filter parameters enabled almost complete removal of one sideband with much reduced computational load. To determine the optimal filter parameters, we acquired images of the infrared card and analyzed the mirror suppression ratio of the card surface. Comparison between images obtained using the two filters revealed that the computational load is reduced by 52.4±0.17% when using the VSB filter as it requires a much shorter truncation length. Finally, we present the anterior segment images of a human volunteer’s eye processed using the VSB filter.

© 2012 Optical Society of America

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2011

2010

2009

S.-W. Lee, H.-W. Jeong, and B.-M. Kim, J. Korean Phys. Soc. 55, 2354 (2009).
[CrossRef]

2007

2006

2005

2003

2002

1991

D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and J. G. Fujimoto, Science 254, 1178 (1991).
[CrossRef]

Aoki, G.

Bajraszewski, T.

Baumann, B.

Chang, W.

D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and J. G. Fujimoto, Science 254, 1178 (1991).
[CrossRef]

Chi, T. T.

Chiang, C. P.

Choma, M.

Choma, M. A.

Dallas, W.

Endo, T.

Fercher, A.

Fercher, A. F.

Flotte, T.

D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and J. G. Fujimoto, Science 254, 1178 (1991).
[CrossRef]

Fujimoto, J. G.

D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and J. G. Fujimoto, Science 254, 1178 (1991).
[CrossRef]

Gotzinger, E.

Gregory, K.

D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and J. G. Fujimoto, Science 254, 1178 (1991).
[CrossRef]

Hee, M. R.

D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and J. G. Fujimoto, Science 254, 1178 (1991).
[CrossRef]

Hitzenberger, C.

Hitzenberger, C. K.

Hsu, K.

Huang, D.

D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and J. G. Fujimoto, Science 254, 1178 (1991).
[CrossRef]

Itoh, M.

Izatt, J.

Izatt, J. A.

Jeong, H.-W.

S.-W. Lee, H.-W. Jeong, and B.-M. Kim, J. Korean Phys. Soc. 55, 2354 (2009).
[CrossRef]

Kiang, Y. W.

Kim, B.-M.

S.-W. Lee, H.-W. Jeong, and B.-M. Kim, J. Korean Phys. Soc. 55, 2354 (2009).
[CrossRef]

Kowalczyk, A.

Lee, C. K.

Lee, K. S.

Lee, S.-W.

S.-W. Lee, H.-W. Jeong, and B.-M. Kim, J. Korean Phys. Soc. 55, 2354 (2009).
[CrossRef]

Leitgeb, R.

Leitgeb, R. A.

Lin, C. P.

D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and J. G. Fujimoto, Science 254, 1178 (1991).
[CrossRef]

Makita, S.

Meemon, P.

Pircher, M.

Puliafito, C. A.

D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and J. G. Fujimoto, Science 254, 1178 (1991).
[CrossRef]

Rolland, J. P.

Sarunic, M.

Schuman, J. S.

D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and J. G. Fujimoto, Science 254, 1178 (1991).
[CrossRef]

Stinson, W. G.

D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and J. G. Fujimoto, Science 254, 1178 (1991).
[CrossRef]

Swanson, E. A.

D. Huang, E. A. Swanson, C. P. Lin, J. S. Schuman, W. G. Stinson, W. Chang, M. R. Hee, T. Flotte, K. Gregory, C. A. Puliafito, and J. G. Fujimoto, Science 254, 1178 (1991).
[CrossRef]

Wang, R. K.

R. K. Wang, Appl. Phys. Lett. 90, 054103 (2007).
[CrossRef]

Wojtkowski, M.

Wu, C. T.

Yang, C.

Yang, C. C.

Yasuno, Y.

Yatagai, T.

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Figures (5)

Fig. 1.
Fig. 1.

VSB filter function expressed in Eq. (1).

Fig. 2.
Fig. 2.

Simulation of (a) Hilbert transform (R=0) and (b) VSB filter (R0) with truncation lengths (N) of 3, 5, 7, and 9.

Fig. 3.
Fig. 3.

IR card images (a) with and without the mirror artifact using the filter with R=0 (Hilber transform) and with R=0.3 (VSB filter) at the truncation length (N) of (e) 5, (f) 7, and (g) 9. Each image has 1130(axial)×1800(lateral) pixels with a lateral scan range of 12.5 mm.

Fig. 4.
Fig. 4.

Mirror suppression ratio (dB) measured from the IR card surface images with a peak sensitivity of 27 dB using the filter with R=0 (Hilbert transform) and with R0 (VSB filter) as a function of truncation length (N).

Fig. 5.
Fig. 5.

Anterior segment images of a human volunteer’s eye (a) with and (b) without the mirror artifact by using VSB. Each image comprises 2048(axial)×1800(lateral) pixels with a lateral scan range of 12.5 mm.

Equations (3)

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H(ω)={0π2(R2)<ω<π2R1π2R<ω<π2(2R)12[1+cos(ωRπ2)]|ω|<π2R12[1+sgn(R12)cos(ωRπ2)]|ω|>π2(2R),
h(k)=sin(πk/2)πk/2·cos(πRk/2)(1R2k2)·ejπk2.
y(n)=h(n)*x(n)x(n)+jk=0NIm[h(2k1)]×[x(n2k1)x(n+2k+1)].

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