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https://www.readbyqxmd.com/read/28196050/visualization-of-the-macula-in-gas-filled-eyes-spectral-domain-optical-coherence-tomography-versus-swept-source-optical-coherence-tomography
#1
Seong Joon Ahn, Seung Hoon Park, Byung Ro Lee
PURPOSE: To compare the visualization of the macula between spectral domain optical coherence tomography (SD-OCT) and swept-source OCT (SS-OCT) in gas-filled eyes. METHODS: Sixty-one patients with common indications of gas tamponade, including 27 with macular holes and 34 with rhegmatogenous retinal detachment, who were treated with vitrectomy and gas tamponade were imaged using both SD-OCT (3D-OCT 2000, Topcon, Tokyo, Japan) and SS-OCT (DRI-OCT, Topcon) at 1, 3, and 7 days after the surgery...
February 10, 2017: Retina
https://www.readbyqxmd.com/read/28195614/omega-sign-a-distinct-optical-coherence-tomography-finding-in-macular-combined-hamartoma-of-retina-and-retinal-pigment-epithelium
#2
Vinod Kumar, Rohan Chawla, Koushik Tripathy
BACKGROUND AND OBJECTIVE: To report a distinct optical coherence tomography (OCT) appearance of macular combined hamartoma of retina and retinal pigment epithelium (CHRRPE). PATIENTS AND METHODS: This is a retrospective case series of four eyes of four patients with macular CHRRPE who were assessed with the help of color fundus photographs, swept-source OCT (SS-OCT), and fundus fluorescein angiography wherever required. RESULTS: All four patients presented with decreased visual acuity...
February 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28192795/wide-field-en-face-swept-source-optical-coherence-tomography-features-of-extrafoveal-retinoschisis-in-highly-myopic-eyes
#3
Wei Xiao, Zhuoting Zhu, Capucine Odouard, Ou Xiao, Xinxing Guo, Mingguang He
Purpose: To evaluate the features of extrafoveal retinoschisis (EFRS) in highly myopic eyes detected by swept-source optical coherence tomography (SS-OCT). Methods: In this retrospective case series, 89 eyes of 65 patients with high myopia and coexisting EFRS were included. The participants underwent a comprehensive ophthalmologic examination, including visual acuity, ocular biometry, refraction, and perimetry. Three-dimensional wide-field scans were obtained with SS-OCT, and en face images were reconstructed with custom software...
February 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28168046/measurement-of-and-factors-associated-with-the-anterior-chamber-volume-in-healthy-chinese-adults
#4
Yuan Zong, Qian Xu, Chunhui Jiang, Haohao Zhu, Jian Yu, Xinghuai Sun
Purpose. To measure the anterior chamber volume (ACV) and determine factors associated with the ACV in healthy Chinese adults. Methods. In this cross-sectional study, we used swept-source optical coherence tomography (SS-OCT) to measure ACV and other anterior segment parameters. Factors associated with ACV were also determined. Results. A total of 313 healthy Chinese adults were enrolled. The anterior segment parameters, including ACV, could be measured by SS-OCT with excellent repeatability and reproducibility...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28133544/an-assessment-of-vitreous-degeneration-in-eyes-with-vitreomacular-traction-and-macular-holes
#5
Quraish Ghadiali, Sarwar Zahid, Rosa Dolz-Marco, Anna Tan, Michael Engelbert
Purpose. To compare the stages of vitreous degeneration in patients with vitreomacular traction (VMT) and macular holes (MH). Methods. A retrospective study was performed analyzing stages of vitreous degeneration of eyes with VMT or MH using swept-source optical coherence tomography (SS-OCT) and spectral-domain optical coherence tomography (SD-OCT). An analogous review was performed on a control group of eyes with contralateral posterior vitreous detachments. Thirty-four eyes with VMT/MH and 39 control eyes were reviewed...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28106238/choroidal-thickness-and-structural-glaucoma-parameters-in-glaucomatous-preperimetric-glaucomatous-and-healthy-eyes-using-swept-source-oct
#6
Handan Akil, Mayss Al-Sheikh, Khalil Ghasemi Falavarjani, Brian Francis, Vikas Chopra
PURPOSE: To evaluate choroidal thickness (CT) and its relationship with retinal nerve fiber layer (RNFL) and ganglion cell-inner plexiform layer thickness (GCIPLT) in glaucomatous, preperimetric glaucomatous, and healthy eyes using swept-source optical coherence tomography (SS-OCT). METHODS: Fifty eyes with primary open-angle glaucoma, 20 eyes with preperimetric glaucoma, and 20 age-matched healthy eyes were enrolled. Three-dimensional wide-field (12 × 9 mm) images were obtained using a SS-OCT instrument...
January 16, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28092396/agreement-between-three-optical-coherence-tomography-devices-to-assess-the-insertion-distance-and-thickness-of-horizontal-rectus-muscles
#7
Lucía De-Pablo-Gómez-de-Liaño, José Ignacio Fernández-Vigo, Néstor Ventura-Abreu, Julián García-Feijóo, José Ángel Fernández-Vigo, Rosario Gómez-de-Liaño
PURPOSE: To assess the agreement between two different spectral domain (SD-OCT) and one swept source (SS-OCT) optical coherence tomography device to measure the insertion distance and the thickness of the horizontal rectus muscles. METHODS: Seventy eyes from 35 healthy patients were studied. Three OCT instruments-Spectralis (Heidelberg Engineering Inc., Heidelberg, Germany), Cirrus 5000 (Carl Zeiss Meditec, Dublin, CA), and Triton (Topcon, Inc., Tokyo, Japan)-were used to measure the limbus insertion distance and the thickness of the lateral rectus and medial rectus muscles...
January 13, 2017: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28079690/noncontact-evaluation-of-corneal-grafts-swept-source-fourier-domain-oct-versus-high-resolution-scheimpflug-imaging
#8
Eszter Szalai, Gábor Németh, Ziad Hassan, László Módis
PURPOSE: To study the reliability and repeatability of anterior segment measurements in patients who underwent penetrating keratoplasty with swept light source Fourier domain anterior segment optical coherence tomography (SS-OCT) in comparison with a high-resolution Scheimpflug camera. METHODS: Keratometry (K) and elevation data of the anterior and posterior corneal surfaces, central corneal thickness, and anterior chamber depth were determined in 56 postkeratoplasty eyes (mean age: 59...
January 11, 2017: Cornea
https://www.readbyqxmd.com/read/28072615/retinal-detachment-associated-with-peripapillary-staphyloma-imaged-with-swept-source-optical-coherence-tomography
#9
Daisuke Kunita, Makoto Inoue, Takashi Koto, Akito Hirakata
PURPOSE: To examine a rhegmatogenous retinal detachment (RRD) associated with a peripapillary staphyloma with swept source optical coherence tomography (SS-OCT) before and after vitrectomy and circumferential photocoagulation. METHODS: The SS-OCT images including the montage images of two patients with a RRD associated with peripapillary staphylomas were analyzed. A 34-year-old woman (Case 1) and a 70-year-old woman (Case 2) both noticed temporal visual field defects in their left eyes...
January 9, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28060397/swept-source-oct-angiography-shows-sparing-of-the-choriocapillaris-in-multiple-evanescent-white-dot-syndrome
#10
Nicolas A Yannuzzi, Swarup S Swaminathan, Fang Zheng, Andrew Miller, Giovanni Gregori, Janet L Davis, Philip J Rosenfeld
Two women with unilateral vision loss from multiple evanescent white dot syndrome were imaged serially with swept-source optical coherence tomography (SS-OCT). En face wide-field structural images revealed peripapillary outer photoreceptor disruption better than conventional fundus autofluorescence imaging. OCT angiography (OCTA) imaging showed preservation of flow within the retinal vasculature and choriocapillaris. As OCTA imaging of the choriocapillaris continues to evolve, these images may lay the groundwork for future investigation...
January 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28060065/lower-tear-meniscus-measurements-using-a-new-anterior-segment-swept-source-optical-coherence-tomography-and-agreement-with-fourier-domain-optical-coherence-tomography
#11
Pedro Arriola-Villalobos, José Ignacio Fernández-Vigo, David Díaz-Valle, Jaime Almendral-Gómez, Cristina Fernández-Pérez, José M Benítez-Del-Castillo
PURPOSE: To assess intraobserver repeatability and interobserver and intersession reproducibility of lower tear meniscus height (LTMH) measurements obtained using a new anterior segment swept-source optical coherence tomography (SS-OCT) device. Agreement with Fourier-domain (FD) OCT (Spectralis) was also examined. METHODS: In an observational cross-sectional study, one eye of 29 healthy subjects was randomly imaged with both devices at our center. Two examiners then randomly measured the LTMH using the software's calipers...
February 2017: Cornea
https://www.readbyqxmd.com/read/28059563/resolution-characteristics-of-optical-coherence-tomography-for-dental-use
#12
Hiroshi Watanabe, Ami Kuribayashi, Yasunori Sumi, Tohru Kurabayashi
OBJECTIVES: The purpose of this study was to clarify resolution characteristics of optical coherence tomography (OCT) for dental use. METHODS: Two types of swept-source OCT machines (SS-OCTs) were employed in this study. To clarify their resolution characteristics, we newly developed a glass chart device with a ladder pattern of wavelengths, which ranged from (4 x 2) µm to (1024 x 2) µm, as well as a star-target pattern, a grid pattern, and a spatial frequency response pattern...
January 6, 2017: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/27984838/-imaging-blood-flow-and-pulsation-of-retinal-vessels-with-full-field-swept-source-oct
#13
H Spahr, D Hillmann, C Hain, C Pfäffle, H Sudkamp, G Franke, P Koch, G Hüttmann
Optical coherence tomography (OCT) uses interference to image the retina with high axial resolution. In the last 25 years, new technologies have permitted a steady increase in imaging speed, which made it possible to enlarge the imaged field and to avoid motion artefacts. The speed and precision of retinal imaging is now limited by photodamage of the retina caused by the focused OCT beam and by the speed of the scanning mechanics. Full-field swept-source (FF-SS)-OCT decreases irradiance on the retina and dispenses moving parts by using a camera to acquire the full volume of the retina in parallel...
December 2016: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/27977838/multimodal-imaging-features-in-acute-exudative-paraneoplastic-polymorphous-vitelliform-maculopathy
#14
Daniel Q Li, John Golding, Carl Glittenberg, Netan Choudhry
An 85-year-old woman with stage IV breast cancer was referred for gradually progressive blurred vision. Dilated fundus examination revealed unifocal, yellow, round vitelliform lesions in the macular region of both eyes. The diagnosis of acute exudative paraneoplastic polymorphous vitelliform maculopathy (AEPPVM) was confirmed with swept-source optical coherence tomography (SS-OCT), fundus autofluorescence, and fluorescein angiography. SS-OCT angiography revealed normal vascular findings in both eyes. Multimodal imaging is useful in the diagnosis and monitoring of AEPPVM and may further the understanding of its pathophysiology...
December 1, 2016: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/27956017/a-pilot-study-to-assess-the-morphology-and-progression-of-non-carious-cervical-lesions
#15
Iori Sugita, Syozi Nakashima, Asaomi Ikeda, Michael F Burrow, Toru Nikaido, Shisei Kubo, Junji Tagami, Yasunori Sumi
OBJECTIVE: This longitudinal pilot study aimed to morphologically and quantitatively investigate the progress of non-carious cervical lesions (NCCLs) by using swept-source optical coherence tomography (SS-OCT). METHODS: The samples examined comprised sets of NCCL epoxy resin replicas obtained from 10 lesions in 6 patients who attended annual dental visits over 4 or 5 years. SS-OCT images of the replicas were analyzed in terms of the maximum depth (Dmax) and corresponding vertical width (VW) - using an image analyzer to estimate progression of the NCCLs over time...
December 9, 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27893521/lower-tear-meniscus-measurements-using-a-new-anterior-segment-swept-source-optical-coherence-tomography-and-agreement-with-fourier-domain-optical-coherence-tomography
#16
Pedro Arriola-Villalobos, José Ignacio Fernández-Vigo, David Díaz-Valle, Jaime Almendral-Gómez, Cristina Fernández-Pérez, José M Benítez-Del-Castillo
PURPOSE: To assess intraobserver repeatability and interobserver and intersession reproducibility of lower tear meniscus height (LTMH) measurements obtained using a new anterior segment swept-source optical coherence tomography (SS-OCT) device. Agreement with Fourier-domain (FD) OCT (Spectralis) was also examined. METHODS: In an observational cross-sectional study, one eye of 29 healthy subjects was randomly imaged with both devices at our center. Two examiners then randomly measured the LTMH using the software's calipers...
November 23, 2016: Cornea
https://www.readbyqxmd.com/read/27881909/comparison-of-choroidal-thickness-measurements-between-spectral-domain-oct-and-swept-source-oct-in-normal-and-diseased-eyes
#17
Sidra Zafar, Ma Rehman Siddiqui, Rida Shahzad
PURPOSE: Sub-foveal choroidal thickness (SFCT) is affected in many ocular diseases. The aim of this study was to compare SFCT measurements between Topcon 3D 2000 spectral-domain optical coherence tomography (SD-OCT) and Topcon swept-source OCT (SS-OCT), with different laser wavelengths, in normal and diseased populations. MATERIALS AND METHODS: This was a prospective, cross-sectional, noninterventional study including 27 normal volunteers and 27 participants with retinal disease...
2016: Clinical Ophthalmology
https://www.readbyqxmd.com/read/27872333/three-dimensional-analysis-of-enamel-crack-behavior-using-optical-coherence-tomography
#18
M S Segarra, Y Shimada, A Sadr, Y Sumi, J Tagami
The aim of this study was to nondestructively analyze enamel crack behavior on different areas of teeth using 3D swept source-optical coherence tomography (SS-OCT). Ten freshly extracted human teeth of each type on each arch (n = 80 teeth) were inspected for enamel crack patterns on functional, contact and nonfunctional, or noncontact areas using 3D SS-OCT. The predominant crack pattern for each location on each specimen was noted and analyzed. The OCT observations were validated by direct observations of sectioned specimens under confocal laser scanning microscopy (CLSM)...
November 21, 2016: Journal of Dental Research
https://www.readbyqxmd.com/read/27856030/comparison-between-widefield-en-face-swept-source-oct-and-conventional-multimodal-imaging-for-the-detection-of-reticular-pseudodrusen
#19
Karen B Schaal, Andrew D Legarreta, William J Feuer, Giovanni Gregori, Qianqian Cheng, John E Legarreta, Mary K Durbin, Paul F Stetson, Sophie Kubach, Philip J Rosenfeld
PURPOSE: The ability to detect reticular pseudodrusen (RPD)/subretinal drusenoid deposits (SDDs) using 12×12-mm widefield en face swept-source optical coherence tomography (SS-OCT) imaging was compared with conventional multimodal imaging (color, fundus autofluorescence (FAF), and infrared reflectance [IR] imaging) in eyes with nonexudative age-related macular degeneration (AMD). DESIGN: Cross-sectional study. PARTICIPANTS: Patients with nonexudative AMD were prospectively enrolled in an SS-OCT imaging study at the Bascom Palmer Eye Institute...
February 2017: Ophthalmology
https://www.readbyqxmd.com/read/27849651/duration-of-prone-positioning-after-macular-hole-surgery-determined-by-swept-source-optical-coherence-tomography
#20
Masahiko Sano, Makoto Inoue, Yuji Itoh, Yoshiyuki Kita, Kazunari Hirota, Takashi Koto, Akito Hirakata
PURPOSE: To compare the closure rate of macular hole closure and duration of the prone positioning after macular hole (MH) surgery with two protocols for halting the prone positioning. METHODS: The authors studied 129 eyes of 125 consecutive patients with MH who had undergone vitrectomy. In 60 eyes of 59 patients, the prone positioning was halted after detecting an MH closure in the swept-source optical coherence tomographic images (SS group). In 69 eyes of 66 patients, the prone position was halted by the surgeon's decision (conventional group)...
November 15, 2016: Retina
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