keyword
MENU ▼
Read by QxMD icon Read
search

Anterior segment optical coherence tomography

keyword
https://www.readbyqxmd.com/read/28226738/automatic-anterior-chamber-angle-structure-segmentation-in-as-oct-image-based-on-label-transfer
#1
Huazhu Fu, Yanwu Xu, Damon Wing Kee Wong, Jiang Liu, Mani Baskaran, Shamira A Perera, Tin Aung, Huazhu Fu, Yanwu Xu, Damon Wing Kee Wong, Jiang Liu, Mani Baskaran, Shamira A Perera, Tin Aung, Mani Baskaran, Tin Aung, Huazhu Fu, Yanwu Xu, Damon Wing Kee Wong, Jiang Liu, Shamira A Perera
The anterior chamber angle (ACA) plays an important role for diagnosis and treatment of angle-closure glaucoma. Anterior Segment Optical Coherence Tomography (AS-OCT) imaging is qualitative and quantitative assessment for the ACA structure. In this paper, we propose a novel fully automatic segmentation method for anterior chamber angle structure in AS-OCT. In our method, the initial labels are obtained by using label transfer from the AS-OCT reference dataset. Then, these labels are refined and utilized as the landmarks to support the structure segmentation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28221330/comparison-of-anterior-segment-optical-coherence-tomography-bleb-grading-moorfields-bleb-grading-system-and-intraocular-pressure-after-trabeculectomy
#2
Joanne C Wen, Sandra S Stinnett, Sanjay Asrani
PURPOSE: To compare a novel anterior segment optical coherence tomography (AS-OCT) bleb grading system with a clinical bleb grading system and both with intraocular pressure (IOP) following trabeculectomy surgery. MATERIALS AND METHODS: A novel AS-OCT grading system based on bleb size and internal reflectivity was developed. An imaging center was tasked with masked grading of AS-OCT images acquired by multiple surgical sites at postoperative week (POW) 2, postoperative month (POM) 4, 6, and 12, respectively...
February 17, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28210174/anterior-segment-optical-coherence-tomography-changes-with-introduction-and-discontinuation-of-tamsulosin
#3
Abdullah Al-Kharashi, Amir A Azimzadeh, Jerry Leung, Sidney Radomski, Lenny Radomski, Wai-Ching Lam
PURPOSE: The aim of this study was to quantify changes and reversibility in pupil dilation and iris dilator muscle region thickness associated with introduction and subsequent discontinuation of tamsulosin in patients naïve to this drug with the aid of an anterior OCT system. METHODS: The study was carried out on 7 patients (14 eyes) naïve to tamsulosin and with benign prostatic hypertrophy (BHP). Measurements taken by Vistante OCT were done pre- and post-dilation of the following: pupil size, iris dilator muscle region (DMR) thickness, sphincter muscle region (SMR) thickness, and anterior chamber depth...
July 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28203200/late-onset-inadvertent-bleb-formation-following-pars-plana-m3-molteno-implant-tube-obstruction
#4
Anmar M Abdul-Rahman, Anthony Molteno
PURPOSE: To report a case of inadvertent bleb formation presenting 18 months after pars plana M3 Molteno implant tube obstruction in a patient with mixed mechanism glaucoma. MATERIALS AND METHODS: An 84-year-old Caucasian male with mixed mechanism glaucoma underwent slit-lamp examination, gonioscopy, colour anterior segment photography and anterior segment optical coherence tomography (AS-OCT). RESULTS: An inadvertent bleb developed 18 months after pars plana implant tube re-positioning with a 6/0 Vicryl tie ligature...
January 2017: Case Reports in Ophthalmology
https://www.readbyqxmd.com/read/28197740/characteristics-of-successful-filtering-blebs-at-1%C3%A2-year-after-trabeculectomy-using-swept-source-three-dimensional-anterior-segment-optical-coherence-tomography
#5
Akiko Narita, Yuki Morizane, Tomoe Miyake, Jiro Seguchi, Tetsuya Baba, Fumio Shiraga
PURPOSE: To identify the cross-sectional characteristics of filtering blebs associated with intraocular pressure (IOP) control at 1 year after trabeculectomy with a square scleral flap and a fornix-based conjunctival flap. METHODS: A retrospective consecutive case series study was conducted. Eighty-four eyes of 79 patients who had undergone primary trabeculectomy were included. Surgical success was defined as IOP ≤15 mmHg and a >20% reduction in IOP without glaucoma medication and without additional glaucoma surgery at 1 year after trabeculectomy...
February 14, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28196218/association-of-baseline-anterior-segment-parameters-with-the-development-of-incident-gonioscopic-angle-closure
#6
Monisha E Nongpiur, Inas F Aboobakar, Mani Baskaran, Arun Narayanaswamy, Lisandro M Sakata, Renyi Wu, Eray Atalay, David S Friedman, Tin Aung
Importance: Baseline anterior segment imaging parameters associated with incident gonioscopic angle closure, to our knowledge, are unknown. Objective: To identify baseline quantitative anterior segment optical coherence tomography parameters associated with the development of incident gonioscopic angle closure after 4 years among participants with gonioscopically open angles at baseline. Design, Setting, and Participants: Three hundred forty-two participants aged 50 years or older were recruited to participate in this prospective, community-based observational study...
February 9, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28192377/application-of-casia-ss-1000-optical-coherence-tomography-tear-meniscus-imaging-in-testing-the-efficacy-of-new-strip-meniscometry-in-dry-eye-diagnosis
#7
Megumi Shinzawa, Murat Dogru, Keiichi Miyasaka, Jun Shimazaki, Tetsuju Sekiryu
PURPOSE: To investigate the applicability of CASIA SS-1000 anterior-segment optical coherence tomography (AS-OCT) imaging parameters in testing the efficacy of the new strip meniscometry (SM) namely "Strip Meniscometry Tube" (SMTube) in the diagnosis of dry eyes. METHODS: Forty-three eyes of 22 patients (4 men and 18 women) with definite dry eye disease (DED) and 49 eyes of 28 normal controls (6 men and 22 women) were studied. All subjects underwent symptom questionnaires, SMTube, the Schirmer-1 test, tear film break-up time measurement, vital staining examinations, as well as tear meniscus height (TMH) and TM area (TMA) measurements using an AS-OCT system...
January 6, 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28188019/qualitative-analysis-of-repaired-filtering-blebs-with-anterior-segment-optical-coherence-tomography
#8
M Cerdà-Ibáñez, V T Pérez-Torregrosa, A Olate-Pérez, I Almor Palacios, A Gargallo-Benedicto, V Osorio-Alayo, A Barreiro Rego, A Duch-Samper
OBJECTIVE: To provide a qualitative analysis of filtering blebs after being surgically repaired due to late blebs leaks. METHODS: Blebs were studied 6 months after surgical reparation using AS-OCT Triton (Topcon(®)). An analysis was made of the morphological pattern and internal structures of blebs, including the covering, in 10 patients. The images were obtained using OCTs at a wavelength of 1050nm. RESULTS: According to the Hirooka classification, three different patterns were found in the structure of blebs, which made it possible to correlate them with their functionality...
February 7, 2017: Archivos de la Sociedad Española de Oftalmología
https://www.readbyqxmd.com/read/28187469/-intraoperative-optical-coherence-tomography-an-overview-of-current-clinical-data-for-the-application-in-the-anterior-and-posterior-segments
#9
A J Augustin
Intraoperative optical coherence tomography (iOCT) represents another milestone in ocular imaging technologies. Now, for the first time, high resolution OCT images are available not only pre- or postoperatively, but also intraoperatively. In recent years, there have been significant advances in iOCT technology - from hand-held probes and mounted systems towards iOCT systems which are fully integrated into the surgical microscope and which provide seamless integration into the workflow. These systems offer high-resolution, intraoperative OCT scans in real-time and provide additional information on microstructures of the retina or the cornea...
February 10, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28169918/bilateral-blebs-secondary-to-spontaneous-scleral-perforations
#10
Ester Fernández López, Alexander Poon, Andrew Huhtanen, Richard Lindsay, Catherine Green
PURPOSE: To report an unusual case of bilateral spontaneous scleral perforations. METHODS: A 34-year-old woman presented with bilateral conjunctival blebs and decreased vision in both eyes. There was no history of ocular trauma or surgery and no previous ophthalmic or systemic conditions that may have contributed to the scleral perforations. RESULTS: Best-corrected visual acuity was 20/40 in both eyes and intraocular pressures were 6 mm Hg in the right and 5 mm Hg in the left...
February 6, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28168046/measurement-of-and-factors-associated-with-the-anterior-chamber-volume-in-healthy-chinese-adults
#11
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/28163119/accuracy-of-optical-coherence-tomography-measurements-of-rectus-muscle-insertions-in-adult-patients-undergoing-strabismus-surgery
#12
Julia D Rossetto, Kara M Cavuoto, Norma Allemann, Craig A McKeown, Hilda Capo
PURPOSE: To assess the accuracy of anterior segment optical coherence tomography (AS-OCT) in measuring the distance of extraocular muscle (EOM) insertion to the limbus to improve preoperative assessment of adult patients undergoing strabismus surgery. DESIGN: Reliability analysis. SETTING: An institutional practice. PATIENT POPULATION: 74 adult patients scheduled for strabismus surgery on rectus muscles. OBSERVATION PROCEDURE: The distance between the EOM insertion and the limbus was measured preoperatively with AS-OCT...
February 2, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28161919/cysts-of-the-iris-pigment-epithelium-what-is-new-and-interesting-the-2016-jose-rizal-international-medal-lecture
#13
REVIEW
Jerry A Shields, Carol L Shields
PURPOSE: Cysts of the iris pigment epithelium (IPE) can involve the pupillary margin, midzone, or peripheral location or can be free-floating in the aqueous or vitreous or lodged in the anterior chamber angle. Avariant of IPE cyst, known as iris flocculi, can be a marker for systemic thoracic aneurysm. DESIGN: Review of IPE cysts and description of new observations of the lesions. METHODS: Review of IPE cysts. RESULTS: Lesions in 672 eyes were classified as of the pupillary margin (n = 49; 7%), midzone (n = 188; 28%), peripheral (n = 424; 63%), or dislodged/free-floating (n = 11; 2%)...
January 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/28157900/single-camera-full-range-high-resolution-spectral-domain-optical-coherence-tomography
#14
En Bo, Si Chen, Dongyao Cui, Shi Chen, Xiaojun Yu, Yuemei Luo, Linbo Liu
We developed spectral domain optical coherence tomography using a dual-channel spectrometer for complex conjugate artifacts (CCA) suppression. We used a three-line charge coupled device to simultaneously detect two interferometric spectra with 2π/3 phase difference. The complex interferometric signal was reconstructed by trigonometric manipulation of two real interferometric spectra, and then full-range images were obtained by use of inverse Fourier transform. Artifacts at direct current (DC) and the ghost remnant of the CCA are common issues with the previously reported two-spectrometer method because the slight mismatching between two spectral detection channels had strong negative effects on CCA suppression and appeared to be the limiting factor on system performance...
January 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28133888/alterations-of-the-outer-retina-in-non-arteritic-anterior-ischemic-optic-neuropathy-detected-using-spectral-domain-optical-coherence-tomography
#15
Philipp Ackermann, Maike Brachert, Philipp Albrecht, Marius Ringelstein, David Finis, Gerd Geerling, Orhan Aktas, Rainer Guthoff
BACKGROUND: Changes in peripapillary and macular retinal layer thickness in non-arteritic anterior ischemic optic neuropathy (NAION) measured using spectral-domain optical coherence tomography may reflect a characteristic disease pattern. Advanced software enables retinal layer segmentation. In this study, we compared retinal layer thicknesses in acute and chronic NAION. DESIGN: A single-center cross-sectional analysis in a university clinic. PARTICIPANTS: 14 eyes with acute (<7 days) and 13 eyes with chronic NAION and 20 age-matched healthy eyes...
January 30, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28129300/multimodal-assessment-of-corneal-thinning-using-optical-coherence-tomography-scheimpflug-imaging-pachymetry-and-slit-lamp-examination
#16
Julius T Oatts, Jeremy D Keenan, Tova Mannis, Tom M Lietman, Jennifer Rose-Nussbaumer
PURPOSE: To assess the relationship between corneal thinning measured by clinician-graded slit-lamp examination compared with ultrasound pachymetry (USP), anterior segment optical coherence tomography (AS-OCT), and the Pentacam. METHODS: Patients with corneal thinning underwent USP, AS-OCT, Pentacam measurements and standardized clinical grading by 2 cornea specialists estimating thinning on slit-lamp examination. Reproducibility of each testing modality was assessed using the intraclass correlation coefficient...
January 26, 2017: Cornea
https://www.readbyqxmd.com/read/28129293/ocular-surface-epithelial-atypia-mimicking-squamous-neoplasia-in-association-with-ulcerative-colitis
#17
Sally S Ong, Scott D Walter, Xi Chen, Gargi K Vora, Melissa Daluvoy, Alan D Proia, Prithvi Mruthyunjaya
PURPOSE: Inflammatory bowel disease may be associated with extraintestinal manifestations. We report a case of severe reactive epithelial atypia resembling ocular surface squamous neoplasia (OSSN) in a patient with ulcerative colitis (UC). METHODS: Case report. RESULTS: A 32-year-old woman presented with sequential, progressive keratoconjunctival lesions in the left and right eyes, and both lesions were excised. Anterior segment optical coherence tomography demonstrated features similar to OSSN, whereas histological examination revealed severe reactive epithelial atypia mimicking severe dysplasia...
January 26, 2017: Cornea
https://www.readbyqxmd.com/read/28122087/altered-anterior-segment-biometric-parameters-in-mice-deficient-in-sparc
#18
Henrietta Ho, Hla M Htoon, Gary Hin-Fai Yam, Li Zhen Toh, Nyein Chan Lwin, Stephanie Chu, Ying Shi Lee, Tina T Wong, Li-Fong Seet
Purpose: Secreted protein acidic and rich in cysteine (SPARC) and Hevin are structurally related matricellular proteins involved in extracellular matrix assembly. In this study, we compared the anterior chamber biometric parameters and iris collagen properties in SPARC-, Hevin- and SPARC-/Hevin-null with wild-type (WT) mice. Methods: The right eyes of 53 WT, 35 SPARC-, 56 Hevin-, and 63 SPARC-/Hevin-null mice were imaged using the RTVue-100 Fourier-domain optical coherence tomography system...
January 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28110637/surgical-reconstruction-of-traumatic-ciliary-body-dialysis-a-case-report
#19
Adam Kluś, Mariusz Kosatka, Milena Kozera, Marek Rękas
BACKGROUND: A cyclodialysis cleft is a gap resulting from disruption of the longitudinal fibers constituting the ciliary body attachment to the scleral spur. The cyclodialysis cleft can be of traumatic or iatrogenic origin, and it may occur during intraocular surgery or as a result of a glaucoma operation. In this report we present a surgical technique to treat cyclodialysis: cyclopexy combined with phacoemulsification subluxation lens, transscleral suturing of Cionni ring, and intraocular lens implantation with iris cerclage suture...
January 23, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28107088/the-national-eye-survey-of-trinidad-and-tobago-nestt-rationale-objectives-and-methodology
#20
Tasanee Braithwaite, Neville Q Verlander, Debra Bartholomew, Petra Bridgemohan, Kevin McNally, Allana Roach, Subash Sharma, Deo Singh, Konrad Pesudovs, Surujpal Teelucksingh, Christine Carrington, Samuel Ramsewak, Rupert Bourne
PURPOSE: This paper describes the rationale, study design and procedures of the National Eye Survey of Trinidad and Tobago (NESTT). The main objective of this survey is to obtain prevalence estimates of vision impairment and blindness for planning and policy development. METHODS: A population-based, cross-sectional survey was undertaken using random multistage cluster sampling, with probability-proportionate-to-size methods. Eligible participants aged 5 years and older were sampled from the non-institutional population in each of 120 cluster segments...
January 20, 2017: Ophthalmic Epidemiology
keyword
keyword
49794
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"