Signal averaging improves signal-to-noise in OCT images: But which approach works best, and when?
Journal
Biomedical optics express
ISSN: 2156-7085
Titre abrégé: Biomed Opt Express
Pays: United States
ID NLM: 101540630
Informations de publication
Date de publication:
01 Nov 2019
01 Nov 2019
Historique:
received:
29
05
2019
revised:
04
09
2019
accepted:
26
09
2019
entrez:
5
12
2019
pubmed:
5
12
2019
medline:
5
12
2019
Statut:
epublish
Résumé
The high acquisition speed of state-of-the-art optical coherence tomography (OCT) enables massive signal-to-noise ratio (SNR) improvements by signal averaging. Here, we investigate the performance of two commonly used approaches for OCT signal averaging. We present the theoretical SNR performance of (a) computing the average of OCT magnitude data and (b) averaging the complex phasors, and substantiate our findings with simulations and experimentally acquired OCT data. We show that the achieved SNR performance strongly depends on both the SNR of the input signals and the number of averaged signals when the signal bias caused by the noise floor is not accounted for. Therefore we also explore the SNR for the two averaging approaches after correcting for the noise bias and, provided that the phases of the phasors are accurately aligned prior to averaging, then find that complex phasor averaging always leads to higher SNR than magnitude averaging.
Identifiants
pubmed: 31799045
doi: 10.1364/BOE.10.005755
pii: 368841
pmc: PMC6865101
doi:
Types de publication
Journal Article
Langues
eng
Pagination
5755-5775Subventions
Organisme : Austrian Science Fund FWF
ID : P 26553
Pays : Austria
Informations de copyright
Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Déclaration de conflit d'intérêts
The authors declare that there are no conflicts of interest related to this article.
Références
J Biomed Opt. 2014;19(7):071412
pubmed: 25079820
J Biophotonics. 2018 Mar;11(3):
pubmed: 28700119
Ophthalmology. 2008 Jun;115(6):1071-1078.e7
pubmed: 18061270
Biomed Opt Express. 2015 Jun 12;6(7):2435-47
pubmed: 26203372
Opt Lett. 2012 Oct 15;37(20):4209-11
pubmed: 23073413
Br J Ophthalmol. 2006 Feb;90(2):186-90
pubmed: 16424531
Biomed Opt Express. 2018 Jan 08;9(2):486-506
pubmed: 29552388
Science. 1991 Nov 22;254(5035):1178-81
pubmed: 1957169
Biomed Opt Express. 2017 Jan 27;8(2):1172-1202
pubmed: 28271011
Opt Express. 2009 Jan 19;17(2):733-46
pubmed: 19158887
Biomed Opt Express. 2018 Apr 27;9(5):2394-2406
pubmed: 29760996
J Biomed Opt. 2018 Aug;23(8):1-12
pubmed: 30168301
Opt Express. 2003 Apr 21;11(8):889-94
pubmed: 19461802
Opt Lett. 2014 Dec 15;39(24):6783-6
pubmed: 25502996
Ophthalmic Surg Lasers Imaging Retina. 2013 Mar-Apr;44(2):168-75
pubmed: 23510042
PLoS One. 2014 Jul 18;9(7):e102950
pubmed: 25036044
Biomed Opt Express. 2013 Dec 06;5(1):106-22
pubmed: 24466480
Sci Rep. 2016 Jul 05;6:29035
pubmed: 27377852
Phys Med Biol. 2017 Dec 19;63(1):015023
pubmed: 29049034
Biomed Opt Express. 2017 Jan 13;8(2):828-859
pubmed: 28270988
Biomed Opt Express. 2016 Mar 29;7(4):1525-48
pubmed: 27446673
Opt Express. 2012 Jan 16;20(2):1337-59
pubmed: 22274479
Sci Rep. 2017 Nov 1;7(1):14873
pubmed: 29093480
Opt Lett. 2002 Aug 15;27(16):1415-7
pubmed: 18026464
Biomed Opt Express. 2016 Mar 24;7(4):1479-95
pubmed: 27446670
Proc Natl Acad Sci U S A. 2017 Nov 28;114(48):12803-12808
pubmed: 29138314
Opt Lett. 2003 Nov 1;28(21):2067-9
pubmed: 14587817
Opt Express. 2003 Sep 8;11(18):2183-9
pubmed: 19466106
Biomed Opt Express. 2011 Aug 1;2(8):2392-402
pubmed: 21833376
Transl Vis Sci Technol. 2016 Jan 11;5(1):1
pubmed: 26835180
Opt Lett. 2017 Jul 15;42(14):2738-2741
pubmed: 28708157
J Biophotonics. 2015 Apr;8(4):279-302
pubmed: 25412100
Opt Express. 2013 Aug 12;21(16):19412-36
pubmed: 23938857
Biomed Opt Express. 2016 Jun 10;7(7):2551-64
pubmed: 27446689
IEEE Trans Med Imaging. 2018 Sep;37(9):1978-1988
pubmed: 29990154
Opt Lett. 2016 Jan 15;41(2):321-4
pubmed: 26766704
Opt Express. 2013 Apr 22;21(8):9757-73
pubmed: 23609683
J Biomed Opt. 2015 Mar;20(3):036013
pubmed: 25793561
Biomed Opt Express. 2017 Jan 18;8(2):902-917
pubmed: 28270992