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Articoli di riviste sul tema "Optical tomography"

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Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 20 luglio 2024

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1

Kalnaya, O. A., e Yu S. Kurskoy. "Femtosecond Optical Tomography". Metrology and instruments, n. 2 (21 maggio 2020): 57–60. http://dx.doi.org/10.33955/2307-2180(2)2020.57-60.

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The aim of the work is development of medical optical tomography technologies. The physical principles, tasks, and boundary possibilities of the optical tomography systems are considered. The autors propose to use the femtosecond lasers, operating in the «optical comb» mode, as a lught source in optical tomography system. The advantages of this source uses were analyzed and resolution power of femtosecond optical tomographs was calculated in the artical.

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2

Pattan, Anusha U., e Shubhangi D.C. "Optical Tomography: The Survey on Optical Tomographic Techniques". International Journal of Advanced Research in Computer Science and Software Engineering 7, n. 6 (30 giugno 2017): 376–81. http://dx.doi.org/10.23956/ijarcsse/v7i6/0300.

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3

Kumar Singh Anjali, Avanish. "Study of Clinical Evaluation of Glaucoma with Anterior Segment OCT (Optical Coherence Tomography) and Optic Nerve Head OCT (Optical Coherence Tomography)". International Journal of Science and Research (IJSR) 12, n. 8 (5 agosto 2023): 627–32. http://dx.doi.org/10.21275/mr23728180729.

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4

Haisch, Christoph. "Optical Tomography". Annual Review of Analytical Chemistry 5, n. 1 (19 luglio 2012): 57–77. http://dx.doi.org/10.1146/annurev-anchem-062011-143138.

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5

Coufal, Hans. "Optical tomography?" Journal of Molecular Structure 347 (marzo 1995): 285–91. http://dx.doi.org/10.1016/0022-2860(95)08551-6.

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6

Leutwyler, Kristin. "Optical Tomography". Scientific American 270, n. 1 (gennaio 1994): 147–49. http://dx.doi.org/10.1038/scientificamerican0194-147.

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7

Davis, Cole, e Wayne Kuang. "Optical coherence tomography: a novel modality for scrotal imaging". Canadian Urological Association Journal 3, n. 4 (1 maggio 2013): 319. http://dx.doi.org/10.5489/cuaj.1128.

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Background: For patients with nonobstructive azoospermia,sperm retrieval rates remain modest. We describe the use ofoptical coherence tomography to improve retrieval rates and todecrease tissue destruction.Methods: Four patients underwent diagnostic testicular biopsyand imaging with the Niris optical coherence tomography de -vice. We performed a descriptive comparison between optic alcoherence tomographic images and conventional histology.Results: The measured seminiferous tubule diameter differed by16 μm between comparative imaging from optical coherencetomography and conventional histology using hematoxylin andeosin staining.Conclusion: We illustrate the usefulness of optical coherencetomography in the setting of testicular biopsy and the managementof nonobstructive azoospermia.Contexte : Chez les patients atteints d'azoospermie non obstructive,les taux de collecte de spermatozoïdes demeurent modestes.Nous décrivons le recours à une tomographie optiquecohérente pour améliorer les taux de collecte et réduire ladestruction tissulaire.Méthodes : Quatre patients ont subi une biopsie testiculaire diagnostiqueet une épreuve d'imagerie à l'aide d'un appareil Nirisde tomographie optique cohérente. Une comparaison descriptivea été effectuée entre les images obtenues par tomographieoptique cohérente et les résultats des épreuves histologiquesstandard.Résultats : La différence dans le diamètre des tubules séminifèresmesuré par tomographie optique cohérente et par coloration histologiqueà l'hématoxyline-éosine n'était que de 16 μm.Conclusion : Nous présentons une étude descriptive illustrant l’uti -lité de la tomographie optique cohérente pendant une biopsietesticulaire en vue de la prise en charge d'une azoospermie nonobstructive.

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8

Soeda, Tsunenari, Shiro Uemura, Yoshihiko Saito, Kyoichi Mizuno e Ik-Kyung Jang. "Optical Coherence Tomography and Coronary Plaque Characterization". Journal of the Japanese Coronary Association 19, n. 4 (2013): 307–14. http://dx.doi.org/10.7793/jcoron.19.033.

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9

C. Kharmyssov, C. Kharmyssov, M. W. L. Ko M. W. L. Ko e J. R. Kim J. R. Kim. "Automated segmentation of optical coherence tomography images". Chinese Optics Letters 17, n. 1 (2019): 011701. http://dx.doi.org/10.3788/col201917.011701.

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10

Rollins, Andrew M., e Joseph A. Izatt. "Optimal interferometer designs for optical coherence tomography". Optics Letters 24, n. 21 (1 novembre 1999): 1484. http://dx.doi.org/10.1364/ol.24.001484.

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11

El-Sherif, Ashraf, Yasser El-Sharkawy e Ramy Yehia. "Optical Coherence Tomography". International Conference on Mathematics and Engineering Physics 4, n. 4 (1 maggio 2008): 1. http://dx.doi.org/10.21608/icmep.2008.29902.

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12

Puliafito, Carmen A. "Optical Coherence Tomography". Ophthalmic Surgery, Lasers and Imaging Retina 31, n. 3 (maggio 2000): 181. http://dx.doi.org/10.3928/1542-8877-20000501-03.

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13

WADA, Yukihisa. "Optical Computed Tomography". JOURNAL OF JAPAN SOCIETY FOR LASER SURGERY AND MEDICINE 21, n. 1 (2000): 83–92. http://dx.doi.org/10.2530/jslsm1980.21.1_83.

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14

Ahmad, Faheem, e Muhmmad Hussian. "OPTICAL COHERENCE TOMOGRAPHY". Professional Medical Journal 23, n. 09 (10 settembre 2016): 1149–56. http://dx.doi.org/10.29309/tpmj/2016.23.09.1713.

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“Glaucoma an optic neuropathy is a caused by progressive retinal ganglion cell(RGC) loss associated with characteristic structural changes in the optic nerve and retinal nervefiber layer (RNFL).Glaucoma induced damage causes the retinal ganglion cells loss that canresult in functional loss and decrease in vision of patient . Measurement of intraocular pressureby Tonometery, characteristics of the optic nerve head changes and associated visual fieldloss are used for diagnosis of Glaucoma. Objectives: To determine the diagnostic accuracy ofOptical Coherence Tomography in detection of glaucoma taking perimetry as gold standard.Study Design: Cross sectional (validation). Period: Six months from 17-02-2014 to 16-08-2014.Material and Method: Regarding the Inclusion Criteria patients of glaucoma suspects that meetthe criteria mentioned in operational definition of either gender with age range between 35- 60years were included while patients having refractive errors, hazy media, pupil size less than4mm after dilation were not included in this study. Also patients with history diabetes mellitus,refractive or retinal surgery were also excluded. All the data was entered and analyzed by usingSPSS V-16. Results: A total of 100 patients were included in this study during the study period.Majority of the patients were between 35-45 years of age and minimum patients were 56-60 years old. Mean age of the patients was 47.10±8.02 years. Males and females were 50(50%). At OCT glaucoma was present in 71 patients while at perimetry glaucoma was presentin 69 patients .Sensitivity, specificity and diagnostic accuracy of OCT was 92.7%, 77.4%, 88.0%,respectively .Positive predictive value and negative predictive value of OCT was 90.1% and82.7%, respectively. Discussion: Regarding the pathogenesis of Glaucoma induced damageis due to result of retinal ganglion cell (RGC) death with progressive loss of axons located inthe retinal nerve fiber layer (RNFL). Many clinical studies showed that optic nerve head (ONH)damage and thinning of the RNFL occur earlier than the appearance of Glaucoma inducedvisual field defects; Conclusion: In conclusion, glaucoma suspects undergoing the OCT canbe assessed for the presence of glaucoma based purely on the results of the OCT.

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15

Huang, D., E. Swanson, C. Lin, J. Schuman, W. Stinson, W. Chang, M. Hee et al. "Optical coherence tomography". Science 254, n. 5035 (22 novembre 1991): 1178–81. http://dx.doi.org/10.1126/science.1957169.

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16

Sharpe, James. "Optical Projection Tomography". Annual Review of Biomedical Engineering 6, n. 1 (15 agosto 2004): 209–28. http://dx.doi.org/10.1146/annurev.bioeng.6.040803.140210.

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17

Yelbuz, T. Mesud, Michael A. Choma, Lars Thrane, Margaret L. Kirby e Joseph A. Izatt. "Optical Coherence Tomography". Circulation 106, n. 22 (26 novembre 2002): 2771–74. http://dx.doi.org/10.1161/01.cir.0000042672.51054.7b.

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18

Yonetsu, Taishi, Brett E. Bouma, Koji Kato, James G. Fujimoto e Ik-Kyung Jang. "Optical Coherence Tomography". Circulation Journal 77, n. 8 (2013): 1933–40. http://dx.doi.org/10.1253/circj.cj-13-0643.1.

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19

Podoleanu, A. Gh. "Optical coherence tomography". British Journal of Radiology 78, n. 935 (novembre 2005): 976–88. http://dx.doi.org/10.1259/bjr/55735832.

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20

Haruna, Masamitsu. "Optical Coherence Tomography". Journal of The Institute of Image Information and Television Engineers 65, n. 1 (2011): 67–71. http://dx.doi.org/10.3169/itej.65.67.

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21

Fercher, A. F., W. Drexler e C. K. Hitzenberger. "Optical ocular tomography". Neuro-Ophthalmology 18, n. 2 (gennaio 1997): 39–49. http://dx.doi.org/10.3109/01658109709044116.

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22

Chen, Zhongping, Thomas E. Milner, Shyam Srinivas e J. Stuart Nelson. "Optical Doppler Tomography". Optics and Photonics News 8, n. 12 (1 dicembre 1997): 31. http://dx.doi.org/10.1364/opn.8.12.000031.

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23

Fercher, Adolf F. "Optical coherence tomography". Journal of Biomedical Optics 1, n. 2 (1996): 157. http://dx.doi.org/10.1117/12.231361.

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24

Zhongping Chen, Yonghua Zhao, S. M. Srinivas, J. S. Nelson, N. Prakash e R. D. Frostig. "Optical Doppler tomography". IEEE Journal of Selected Topics in Quantum Electronics 5, n. 4 (1999): 1134–42. http://dx.doi.org/10.1109/2944.796340.

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25

Podoleanu, Adrian, V. Lakshminarayanan e A. R. Harvey. "Optical coherence tomography". Journal of Modern Optics 62, n. 21 (17 novembre 2015): 1757. http://dx.doi.org/10.1080/09500340.2015.1092220.

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26

Gurwood, Andrew S., e Marc D. Myers. "Optical Coherence Tomography". Optometry - Journal of the American Optometric Association 76, n. 5 (maggio 2005): 282. http://dx.doi.org/10.1016/s1529-1839(05)70309-2.

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27

McCabe, James M., e Kevin J. Croce. "Optical Coherence Tomography". Circulation 126, n. 17 (23 ottobre 2012): 2140–43. http://dx.doi.org/10.1161/circulationaha.112.117143.

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28

Kumar, Atul, e Subijoy Sinha. "Optical Coherence Tomography". Ophthalmology 115, n. 2 (febbraio 2008): 417–18. http://dx.doi.org/10.1016/j.ophtha.2007.07.019.

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29

Carmichael, Stephen W., e Stephen A. Boppart. "Optical Projection Tomography". Microscopy Today 10, n. 5 (settembre 2002): 3–4. http://dx.doi.org/10.1017/s1551929500058260.

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Abstract (sommario):

There are many approaches to obtaining high-resolution images and three dimensional volumetric data sets, but all have limitations. Many techniques involve reconstructing volumes of information from sections, either physical sections or optical sections. Recently, James Sharpe, Ulf Ahlgren, Paul Perry, Bill Hill, Allyson Ross, Jacob Hecksher-Sørensen, Richard Baldock, and Duncan Davidson have developed an optical technique that is analogous to computed tomography (CT). Whereas clinical CT involves an X-ray source and detector rotating around the patient, optical projection tomography (OPT) has the specimen rotating within an optical pathway.

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30

Katkar, Rujuta A., Satyashankara Aditya Tadinada, Bennett T. Amaechi e Daniel Fried. "Optical Coherence Tomography". Dental Clinics of North America 62, n. 3 (luglio 2018): 421–34. http://dx.doi.org/10.1016/j.cden.2018.03.004.

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31

Takano, Masamichi, Kyoichi Mizuno, SooJoong Kim e Ik-Kyung Jang. "Optical coherence tomography". Current Cardiovascular Imaging Reports 2, n. 4 (agosto 2009): 275–83. http://dx.doi.org/10.1007/s12410-009-0032-7.

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32

Di Mario, Carlo, e Peter Barlis. "Optical Coherence Tomography". JACC: Cardiovascular Interventions 1, n. 2 (aprile 2008): 174–75. http://dx.doi.org/10.1016/j.jcin.2008.01.004.

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33

Fujimoto, James G. "Optical coherence tomography". Comptes Rendus de l'Académie des Sciences - Series IV - Physics 2, n. 8 (ottobre 2001): 1099–111. http://dx.doi.org/10.1016/s1296-2147(01)01257-4.

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34

Ripandelli, Guido, Andrea M. Coppé, Antonella Capaldo e Mario Stirpe. "Optical Coherence Tomography". Seminars in Ophthalmology 13, n. 4 (gennaio 1998): 199–202. http://dx.doi.org/10.3109/08820539809056053.

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35

Burns, James A. "Optical coherence tomography". Current Opinion in Otolaryngology & Head and Neck Surgery 20, n. 6 (dicembre 2012): 477–81. http://dx.doi.org/10.1097/moo.0b013e3283582d7d.

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36

PODOLEANU, A. Gh. "Optical coherence tomography". Journal of Microscopy 247, n. 3 (18 giugno 2012): 209–19. http://dx.doi.org/10.1111/j.1365-2818.2012.03619.x.

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37

Chen, Ching-Jen, Jeyan S. Kumar, Stephanie H. Chen, Dale Ding, Thomas J. Buell, Samir Sur, Natasha Ironside et al. "Optical Coherence Tomography". Stroke 49, n. 4 (aprile 2018): 1044–50. http://dx.doi.org/10.1161/strokeaha.117.019818.

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38

Corbett, Crystal. "Optical Coherence Tomography". Cardiac Cath Lab Director 1, n. 5-6 (ottobre 2011): 135–37. http://dx.doi.org/10.1177/2150133511433992.

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39

Folio, Lindsey S., Gadi Wollstein e Joel S. Schuman. "Optical Coherence Tomography". Optometry and Vision Science 89, n. 5 (maggio 2012): E554—E562. http://dx.doi.org/10.1097/opx.0b013e31824eeb43.

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40

Testoni, Pier Alberto. "Optical Coherence Tomography". Scientific World JOURNAL 7 (2007): 87–108. http://dx.doi.org/10.1100/tsw.2007.29.

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Optical coherence tomography (OCT) is an optical imaging modality that performs high-resolution, cross-sectional, subsurface tomographic imaging of the microstructure of tissues. The physical principle of OCT is similar to that of B-mode ultrasound imaging, except that it uses infrared light waves rather than acoustic waves. Thein vivoresolution is 10–25 times better (about 10 µm) than with high-frequency ultrasound imaging, but the depth of penetration is limited to 1–3 mm, depending on tissue structure, depth of focus of the probe used, and pressure applied to the tissue surface. In the last decade, OCT technology has evolved from an experimental laboratory tool to a new diagnostic imaging modality with a wide spectrum of clinical applications in medical practice, including the gastrointestinal tract and pancreatico-biliary ductal system. OCT imaging from the gastrointestinal tract can be done in humans by using narrow-diameter, catheter-based probes that can be inserted through the accessory channel of either a conventional front-view endoscope, for investigating the epithelial structure of the gastrointestinal tract, or a side-view endoscope, inside a standard transparent ERCP (endoscopic retrograde cholangiopancreatography) catheter, for investigating the pancreatico-biliary ductal system. The esophagus and esophagogastric junction have been the most widely investigated organs so far; more recently, duodenum, colon, and the pancreatico-biliary ductal system have also been extensively investigated. OCT imaging of the gastrointestinal wall structure is characterized by a multiple-layer architecture that permits an accurate evaluation of the mucosa, lamina propria, muscularis mucosae, and part of the submucosa. The technique may therefore be used to identify preneoplastic conditions of the gastrointestinal tract, such as Barrett's epithelium and dysplasia, and evaluate the depth of penetration of early-stage neoplastic lesions. OCT imaging of the pancreatic and biliary ductal system could improve the diagnostic accuracy for ductal epithelial changes, and the differential diagnosis between neoplastic and non-neoplastic lesions.

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41

Regar, E., J. A. Schaar, E. Mont, R. Virmani e P. W. Serruys. "Optical coherence tomography". Cardiovascular Radiation Medicine 4, n. 4 (ottobre 2003): 198–204. http://dx.doi.org/10.1016/j.carrad.2003.12.003.

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42

Ahmed, S. Hinan, e James Mancuso. "Optical Coherence Tomography". Catheterization and Cardiovascular Interventions 81, n. 3 (febbraio 2013): 573. http://dx.doi.org/10.1002/ccd.24827.

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43

Kaschke, Michael, Scott Meyer, Matthew Everett e Marc Grahl. "Optical Coherence Tomography". Optik & Photonik 4, n. 4 (dicembre 2009): 24–28. http://dx.doi.org/10.1002/opph.201190057.

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44

Ha, Richard, Lauren C. Friedlander, Hanina Hibshoosh, Christine Hendon, Sheldon Feldman, Soojin Ahn, Hank Schmidt et al. "Optical Coherence Tomography". Academic Radiology 25, n. 3 (marzo 2018): 279–87. http://dx.doi.org/10.1016/j.acra.2017.09.018.

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Vanore, Maria, e Marie-Odile Benoit-Biancamano. "Optical Coherence Tomography". Veterinary Clinics of North America: Small Animal Practice 53, n. 2 (marzo 2023): 319–38. http://dx.doi.org/10.1016/j.cvsm.2022.10.003.

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46

Tong Wu, Tong Wu, e Youwen Liu Youwen Liu. "Optimal non-uniform fast Fourier transform for high-speed swept source optical coherence tomography". Chinese Optics Letters 11, n. 2 (2013): 021702–21707. http://dx.doi.org/10.3788/col201311.021702.

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47

Paczwa, Katarzyna, e Joanna Gołębiewska. "OPTICAL COHERENCE TOMOGRAPHY AND OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY IN OPHTHALMOLOGY". Polish Journal of Aviation Medicine, Bioengineering and Psychology 26, n. 4 (17 maggio 2023): 45–54. http://dx.doi.org/10.13174/pjambp.17.05.2023.05.

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Abstract: Optical coherence tomography is a non-invasive method of imagining the anterior and the posterior segment of the eye. It is commonly used in ophthalmic practice to diagnose and monitor various pathologies of the eyeball. Optical coherence tomography angiography (OCTA) is a useful tool to visualize the entire retinal and choroidal microvasculature, allowing the assessment of retinal perfusion without intravenous dye administration.

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Oertel, Frederike Cosima, Svenja Specovius, Hanna G. Zimmermann, Claudia Chien, Seyedamirhosein Motamedi, Charlotte Bereuter, Lawrence Cook et al. "Retinal Optical Coherence Tomography in Neuromyelitis Optica". Neurology - Neuroimmunology Neuroinflammation 8, n. 6 (15 settembre 2021): e1068. http://dx.doi.org/10.1212/nxi.0000000000001068.

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Background and ObjectivesTo determine optic nerve and retinal damage in aquaporin-4 antibody (AQP4-IgG)-seropositive neuromyelitis optica spectrum disorders (NMOSD) in a large international cohort after previous studies have been limited by small and heterogeneous cohorts.MethodsThe cross-sectional Collaborative Retrospective Study on retinal optical coherence tomography (OCT) in neuromyelitis optica collected retrospective data from 22 centers. Of 653 screened participants, we included 283 AQP4-IgG–seropositive patients with NMOSD and 72 healthy controls (HCs). Participants underwent OCT with central reading including quality control and intraretinal segmentation. The primary outcome was thickness of combined ganglion cell and inner plexiform (GCIP) layer; secondary outcomes were thickness of peripapillary retinal nerve fiber layer (pRNFL) and visual acuity (VA).ResultsEyes with ON (NMOSD-ON, N = 260) or without ON (NMOSD-NON, N = 241) were assessed compared with HCs (N = 136). In NMOSD-ON, GCIP layer (57.4 ± 12.2 μm) was reduced compared with HC (GCIP layer: 81.4 ± 5.7 μm, p < 0.001). GCIP layer loss (−22.7 μm) after the first ON was higher than after the next (−3.5 μm) and subsequent episodes. pRNFL observations were similar. NMOSD-NON exhibited reduced GCIP layer but not pRNFL compared with HC. VA was greatly reduced in NMOSD-ON compared with HC eyes, but did not differ between NMOSD-NON and HC.DiscussionOur results emphasize that attack prevention is key to avoid severe neuroaxonal damage and vision loss caused by ON in NMOSD. Therapies ameliorating attack-related damage, especially during a first attack, are an unmet clinical need. Mild signs of neuroaxonal changes without apparent vision loss in ON-unaffected eyes might be solely due to contralateral ON attacks and do not suggest clinically relevant progression but need further investigation.

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Kitazawa, Takahiro, e Takanori Nomura. "Refractive index tomography based on optical coherence tomography and tomographic reconstruction algorithm". Japanese Journal of Applied Physics 56, n. 9S (24 agosto 2017): 09NB03. http://dx.doi.org/10.7567/jjap.56.09nb03.

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Kuś, Arkadiusz, Wojciech Krauze e Małgorzata Kujawińska. "From digital holographic microscopy to optical coherence tomography – separate past and a common goal". Photonics Letters of Poland 13, n. 4 (30 dicembre 2021): 91. http://dx.doi.org/10.4302/plp.v13i4.1130.

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In this paper we briefly present the history and outlook on the development of two seemingly distant techniques which may be brought close together with a unified theoretical model described as common k-space theory. This theory also known as the Fourier diffraction theorem is much less common in optical coherence tomography than its traditional mathematical model, but it has been extensively studied in digital holography and, more importantly, optical diffraction tomography. As demonstrated with several examples, this link is one of the important factors for future development of both techniques. Full Text: PDF ReferencesN. Leith, J. Upatnieks, "Reconstructed Wavefronts and Communication Theory", J. Opt. Soc. Am. 52(10), 1123 (1962). CrossRef Y. Park, C. Depeursinge, G. Popescu, "Quantitative phase imaging in biomedicine", Nat. Photonics 12, 578 (2018). CrossRef D. Huang et al., "Optical Coherence Tomography", Science 254(5035), 1178 (1991). CrossRef D. P. Popescu, C. Flueraru, S. 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