keyword
https://read.qxmd.com/read/38538588/observation-of-naturally-canalized-phonon-polaritons-in-liv-2-o-5-thin-layers
#1
JOURNAL ARTICLE
Ana I F Tresguerres-Mata, Christian Lanza, Javier Taboada-Gutiérrez, Joseph R Matson, Gonzalo Álvarez-Pérez, Masahiko Isobe, Aitana Tarazaga Martín-Luengo, Jiahua Duan, Stefan Partel, María Vélez, Javier Martín-Sánchez, Alexey Y Nikitin, Joshua D Caldwell, Pablo Alonso-González
Polariton canalization is characterized by intrinsic collimation of energy flow along a single crystalline axis. This optical phenomenon has been experimentally demonstrated at the nanoscale by stacking and twisting van der Waals (vdW) layers of α-MoO3 , by combining α-MoO3 and graphene, or by fabricating an h-BN metasurface. However, these material platforms have significant drawbacks, such as complex fabrication and high optical losses in the case of metasurfaces. Ideally, it would be possible to canalize polaritons "naturally" in a single pristine layer...
March 27, 2024: Nature Communications
https://read.qxmd.com/read/38535075/anterior-scleral-thickness-and-anterior-segment-biometrics-measured-with-swept-source-ocular-coherence-tomography-in-high-myopic-eyes-with-and-without-glaucoma-a-comparative-study
#2
JOURNAL ARTICLE
Bachar Kudsieh, Rocio Vega-González, Sofia Bryan, Elena Almazan-Alonso, Mariluz Puertas, Lucia Gutiérrez-Martin, Ignacio Flores-Moreno, Jorge Ruiz-Medrano, Muhsen Samaan, Jose Maria Ruiz-Moreno
Background : To assess the anterior scleral thickness (AST), Schlemm's canal diameter (SCD), trabecular meshwork diameter (TMD) and conjunctiva tenon capsule thickness (CTT) in high myopic (HM) subjects and HM subjects with glaucoma (HMG) compared to control eyes. Methods: One hundred and twenty eyes were included, and AST at 0, 1, 2 and 3 mm from the scleral spur, SCD, TMD and CTT were measured. Results : Mean age was 64.2 ± 11.0 years, and the temporal SCD and temporal TMD were significantly longer in the HMG subjects compared to the controls (380...
March 20, 2024: Diagnostics
https://read.qxmd.com/read/38534175/the-association-between-craniofacial-fracture-patterns-and-traumatic-optic-neuropathy
#3
JOURNAL ARTICLE
Bashar Hassan, Joshua Yoon, Adekunle Elegbede, Shannath L Merbs, Fan Liang, Neil R Miller, Paul N Manson, Michael P Grant
Traumatic optic neuropathy (TON) is a rare but potentially devastating complication of craniofacial trauma. Approximately half of patients with TON sustain permanent vision loss. In this study, we sought to identify the most common fracture patterns associated with TON. We performed a retrospective review of craniomaxillofacial CT scans of trauma patients who presented to the R Adams Cowley Shock Trauma Center from 2015 to 2017. Included were adult patients who had orbital fractures with or without other facial fractures...
March 27, 2024: Journal of Craniofacial Surgery
https://read.qxmd.com/read/38529724/a-histomorphometric-and-computational-investigation-of-the-stabilizing-role-of-pectinate-ligaments-in-the-aqueous-outflow-pathway
#4
JOURNAL ARTICLE
Babak Safa, Nina Sara Fraticelli Guzmán, Guorong Li, Daniel Stamer, Andrew Feola, C Ross Ethier
Murine models are commonly used to study glaucoma, the leading cause of irreversible blind-ness. Glaucoma is associated with elevated intraocular pressure (IOP), which is regulated by the tissues of the aqueous outflow pathway. In particular, pectinate ligaments (PLs) connect the iris and trabecular meshwork (TM) at the anterior chamber angle, with an unkown role in maintenance of the biomechanical stability of the aqueous outflow pathway, thus motivating this study. We conducted histomorphometric analysis and optical coherence tomography-based finite element (FE) modeling on three cohorts of C57BL/6 mice: 'young' (2-6 months), 'middle-aged' (11-16 months), and 'elderly' (25-32 months)...
March 26, 2024: Journal of Biomechanical Engineering
https://read.qxmd.com/read/38527168/four-distinct-ipsilateral-vestibular-schwannomas-a-case-of-mosaic-nf2-related-schwannomatosis
#5
JOURNAL ARTICLE
Alexandra E Tunkel, Emily R Youner, Hayk Barseghyan, Yulong Fu, Surajit Bhattacharya, Miriam Bornhorst, Ashkan S Monfared
OBJECTIVES: Distinguishing between sporadic and germline/mosaic NF2-related schwannomatosis is important to ensure that patients have appropriate long-term care. With this report, we describe a unique case of a patient with 4 ipsilateral schwannomas and identify a combination of sequencing modalities that can accurately diagnose mosaic NF2-related schwannomatosis. METHODS: We present a 32-year-old woman with a familial history of vestibular schwannoma in her father and right-sided schwannomas involving the apical and basal turns of cochlea, lateral semicircular canal, and internal auditory canal (IAC)...
March 25, 2024: American Journal of Clinical Pathology
https://read.qxmd.com/read/38521817/tunable-anisotropic-van-der-waals-films-of-2m-ws-2-for-plasmon-canalization
#6
JOURNAL ARTICLE
Qiaoxia Xing, Jiasheng Zhang, Yuqiang Fang, Chaoyu Song, Tuoyu Zhao, Yanlin Mou, Chong Wang, Junwei Ma, Yuangang Xie, Shenyang Huang, Lei Mu, Yuchen Lei, Wu Shi, Fuqiang Huang, Hugen Yan
In-plane anisotropic van der Waals materials have emerged as a natural platform for anisotropic polaritons. Extreme anisotropic polaritons with in-situ broadband tunability are of great significance for on-chip photonics, yet their application remains challenging. In this work, we experimentally characterize through Fourier transform infrared spectroscopy measurements a van der Waals plasmonic material, 2M-WS2 , capable of supporting intrinsic room-temperature in-plane anisotropic plasmons in the far and mid-infrared regimes...
March 23, 2024: Nature Communications
https://read.qxmd.com/read/38511160/visual-outcomes-in-tuberculum-sellae-meningiomas-comparing-transcranial-and-endoscopic-endonasal-approaches
#7
JOURNAL ARTICLE
Ricardo Marian-Magaña, Marcos V Sangrador-Deitos, Luis Rodríguez-Hernández, Jorge A Lara-Olivas, Germán López-Valencia, Rodolfo Villalobos-Díaz, Jorge F Aragón-Arreola, Karen E Padilla-Leal, Jesús Humberto García-Zazueta, Alfredo Camacho-Castro, Juan L Gómez-Amador
BACKGROUND: Tuberculum sellae meningiomas (TSM) account for 3-10% of intracranial meningiomas. Visual loss is the presenting symptom in up to 80% of cases. Surgical management poses a great challenge due to tumor proximity to neurovascular structures such as the optic nerve and the internal carotid artery (ICA); hence, there is controversy regarding the optimal approach. The aim of this study is to determine differences in visual outcomes between transcranial (TCA) and endoscopic endonasal (EEA) approaches...
July 2024: World neurosurgery: X
https://read.qxmd.com/read/38505737/video-rate-endocavity-photoacoustic-harmonic-ultrasound-imaging-with-miniaturized-light-delivery
#8
JOURNAL ARTICLE
Donghyeon Oh, Hyunhee Kim, Minsik Sung, Chulhong Kim
SIGNIFICANCE: Endocavity ultrasound (US) imaging is a frequently employed diagnostic technique in gynecology and urology for the assessment of male and female genital diseases that present challenges for conventional transabdominal imaging. The integration of photoacoustic (PA) imaging with clinical US imaging has displayed promising outcomes in clinical research. Nonetheless, its application has been constrained due to size limitations, restricting it to spatially confined locations such as vaginal or rectal canals...
January 2024: Journal of Biomedical Optics
https://read.qxmd.com/read/38480777/effect-of-digital-ocular-massage-on-intraocular-pressure-and-schlemm-s-canal-dimensions
#9
JOURNAL ARTICLE
Tiffany H Y Wu, Henry K C Lau, Carmelo H Y Lai, Ruby W L Wong, Antonia K W Wong, Andrew Kwok-Cheung Lam
Digital ocular massage has been reported to temporarily lower intraocular pressure (IOP). This could be related to an enhanced aqueous humor outflow; however, the mechanism is not clearly understood. Using anterior segment optical coherence tomography, the Schlemm's canal (SC) and trabecular meshwork (TM) can be imaged and measured. Here, 66 healthy adults underwent digital ocular massage for 10 min in their right eyes. The IOP and dimensions of the SC and TM were measured before and after ocular massage...
March 13, 2024: Scientific Reports
https://read.qxmd.com/read/38468671/inferior-temporal-quadrantanopia-associated-with-pituitary-adenomas-and-a-potential-mechanism-of-excessive-optic-nerve-bending
#10
JOURNAL ARTICLE
Munehiro Demura, Yasuo Sasagawa, Yasuhiko Hayashi, Osamu Tachibana, Mitsutoshi Nakada
BACKGROUND: Pituitary adenomas show typical visual field defects that begin superiorly and progress inferiorly. The cause of atypical visual field defects that start inferiorly remains unclear. This study aimed to understand this phenomenon using magnetic resonance imaging (MRI). METHODS: A total of 220 patients with pituitary adenomas underwent a visual field assessment of both eyes. Preoperative visual fields were assessed and classified into two types: superior quadrantanopia (typical) and inferior quadrantanopia (atypical)...
2024: Surgical Neurology International
https://read.qxmd.com/read/38452590/evaluate-the-aluminum-concentrations-in-whey-milk-samples-of-cows-from-different-areas-using-deep-eutectic-solvent-based-ultrasound-assisted-dispersive-liquid-liquid-microextraction-method
#11
JOURNAL ARTICLE
Asif Ali Unar, Tasneem Gul Kazi, Hassan Imran Afridi, Jameel Ahmed Baig, Ayaz Ali Lashari
This study investigates the contamination of cow milk with aluminum (Al) and its potential health implications, particularly for children. Cow milk samples were collected from both nonexposed and exposed areas in Sindh, based on the source of livestock drinking water (fresh canals and groundwater). An environmental friendly deep eutectic solvent (DES) was used with ultrasonic-assisted dispersive liquid-liquid microextraction (UDLLμE) to enrich trace amounts of Al in whey milk and water samples. The enriched samples were then analyzed using inductively coupled plasma optical emission spectrometry...
February 29, 2024: Talanta
https://read.qxmd.com/read/38408352/acute-management-of-ruptured-cavernous-malformation-of-the-optic-nerve-illustrative-case
#12
JOURNAL ARTICLE
Philip Kawalec, Marc R Del Bigio, Anthony M Kaufmann
BACKGROUND: A cavernous malformation of the optic nerve (CMON) is a rare condition that often presents with an abrupt decline in vision. Acute management of ruptured optic nerve cavernous malformations is generally surgical, although the timing of surgery is controversial. OBSERVATIONS: A 47-year-old female experienced the sudden loss of vision in her left eye. Examination showed that this eye was nearly blind, and her right eye had a temporal field defect. Neuroimaging showed hemorrhage in her left optic nerve and optic chiasm...
February 26, 2024: J Neurosurg Case Lessons
https://read.qxmd.com/read/38407858/retrolaminar-demyelination-of-structurally-intact-axons-in-nonhuman-primate-experimental-glaucoma
#13
JOURNAL ARTICLE
Priya Chaudhary, Howard Lockwood, Cheri Stowell, Eric Bushong, Juan Reynaud, Hongli Yang, Stuart K Gardiner, Galen Wiliams, Imee Williams, Mark Ellisman, Nick Marsh-Armstrong, Claude Burgoyne
PURPOSE: To determine if structurally intact, retrolaminar optic nerve (RON) axons are demyelinated in nonhuman primate (NHP) experimental glaucoma (EG). METHODS: Unilateral EG NHPs (n = 3) were perfusion fixed, EG and control eyes were enucleated, and foveal Bruch's membrane opening (FoBMO) 30° sectoral axon counts were estimated. Optic nerve heads were trephined; serial vibratome sections (VSs) were imaged and colocalized to a fundus photograph establishing their FoBMO location...
February 1, 2024: Investigative Ophthalmology & Visual Science
https://read.qxmd.com/read/38404311/real-time-line-field-optical-coherence-tomography-for-cellular-resolution-imaging-of-biological-tissue
#14
JOURNAL ARTICLE
Kai Neuhaus, Shanjida Khan, Omkar Thaware, Shuibin Ni, Mini Aga, Yali Jia, Travis Redd, Siyu Chen, David Huang, Yifan Jian
A real-time line-field optical coherence tomography (LF-OCT) system is demonstrated with image acquisition rates of up to 5000 B-frames or 2.5 million A-lines per second for 500 A-lines per B-frame. The system uses a high-speed low-cost camera to achieve continuous data transfer rates required for real-time imaging, allowing the evaluation of future applications in clinical or intraoperative environments. The light source is an 840 nm super-luminescent diode. Leveraging parallel computing with GPU and high speed CoaXPress data transfer interface, we were able to acquire, process, and display OCT data with low latency...
February 1, 2024: Biomedical Optics Express
https://read.qxmd.com/read/38403100/effects-of-deep-optic-nerve-head-structures-on-bruch-s-membrane-opening-minimum-rim-width-and-peripapillary-retinal-nerve-fiber-layer
#15
JOURNAL ARTICLE
Mitsuki Kambayashi, Hitomi Saito, Makoto Araie, Nobuko Enomoto, Hiroshi Murata, Tsutomu Kikawa, Kazuhisa Sugiyama, Tomomi Higashide, Atsuya Miki, Aiko Iwase, Goji Tomita, Toru Nakazawa, Makoto Aihara, Kyoko Ohno-Matsui, Tae-Woo Kim, Christopher Kai Shun Leung, Linda M Zangwill, Robert N Weinreb
PURPOSE: To explore the effects of deep optic nerve head (ONH) structures on Bruch's membrane opening (BMO)-minimum rim width (MRW) and peripapillary retinal nerve fiber layer thickness (pRNFLT) in healthy eyes. DESIGN: Prospective cross-sectional study METHODS: Two hundred five healthy eyes of 141 subjects (mean ± standard deviation of age and axial length (AXL): 46.9±10.0 years and 24.79±1.15 mm) were enrolled. Best fit multivariable linear mixed models identified factors associated with BMO-MRW and pRNFLT...
February 23, 2024: American Journal of Ophthalmology
https://read.qxmd.com/read/38400857/assessment-of-schlemm-s-canal-with-swept-source-optical-coherence-tomography-in-graves-ophthalmopathy
#16
JOURNAL ARTICLE
Raziye Dönmez Gün, Titap Yazıcıoğlu, Murat Oklar, Naile Gökkaya
PURPOSE: To evaluate the Schlemm's canal (SC) parameters obtained by swept-source optical coherence tomography (OCT) different in Graves' ophthalmopathy (GO) eyes compared to healthy eyes. METHODS: This cross-sectional observational study evaluated 64 eyes of 32 GO cases and 56 eyes of 28 healthy controls. The study was conducted between October 2020 and June 2021. SC images were obtained from the temporal limbus of individuals using swept-source OCT. SC length (SCL) and SC area (SCA) were measured...
February 24, 2024: Graefe's Archive for Clinical and Experimental Ophthalmology
https://read.qxmd.com/read/38392233/comparative-analysis-of-endodontic-0-15-stainless-steel-k-files-exploring-design-composition-and-mechanical-performance
#17
JOURNAL ARTICLE
Abayomi Omokeji Baruwa, Filipa Chasqueira, Sofia Arantes-Oliveira, João Caramês, Duarte Marques, Jaime Portugal, Jorge N R Martins
To establish a glide path, smaller files (up to size 0.15) with tapers of 2% are commonly used as pathfinding files. They pre-shape the root canal space before transitioning to larger taper endodontic instruments, aiming to prevent procedural errors. This study aimed to compare the design, metal wire composition, and mechanical characteristics of seven different ISO size 15 stainless-steel hand files (K-File and C-File+). Ninety-one new stainless-steel ISO 15 K-files were mechanically tested. All files were inspected for deformations before the assessment...
January 31, 2024: Dentistry Journal
https://read.qxmd.com/read/38391590/label-free-optical-technologies-for-middle-ear-diseases
#18
REVIEW
Zeyi Zhou, Rishikesh Pandey, Tulio A Valdez
Medical applications of optical technology have increased tremendously in recent decades. Label-free techniques have the unique advantage of investigating biological samples in vivo without introducing exogenous agents. This is especially beneficial for a rapid clinical translation as it reduces the need for toxicity studies and regulatory approval for exogenous labels. Emerging applications have utilized label-free optical technology for screening, diagnosis, and surgical guidance. Advancements in detection technology and rapid improvements in artificial intelligence have expedited the clinical implementation of some optical technologies...
January 23, 2024: Bioengineering
https://read.qxmd.com/read/38388791/a-rare-case-of-aneurysmal-bone-cyst-of-the-anterior-clinoid-process-in-an-18-year-old-female-mimicking-optic-neuritis
#19
JOURNAL ARTICLE
Guive Sharifi, Bardia Hajikarimloo, Esmaeil Mohammadi, Elham Paraandavaji, N Akbari Dilmaghani, Niloofar Ayoobi, Ali Jafari
BACKGROUND: Aneurysmal bone cyst (ABC) is an uncommon, benign, vascular multicystic bony lesion that most frequently develops in the first two decades of life. The metaphysis of long bones, pelvic, and vertebral column are the most common locations. The precise underlying pathophysiology of ABCs formation remains unclear; however, it is believed that reactive processes subsequent to trauma or vascular disturbance may play an important role. Involvement of the skull base rarely occurs with a prevalence of up to 5% of intracranial ABCs...
February 23, 2024: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://read.qxmd.com/read/38367239/macrophage-induced-integrin-signaling-promotes-schlemm-s-canal-formation-to-prevent-intraocular-hypertension-and-glaucomatous-optic-neuropathy
#20
JOURNAL ARTICLE
Xinyu Gu, Xun Chen, Xuan Zhang, Keli Liu, Jing-Jing Li, Wenyu Lv, Lei Zeng, Mingjuan Wu, Weibin Zhou, Weifa Wang, Shunhua Shi, Yicheng Deng, Yunhua Li, Xinbo Gao, Rong Ju, Alexandre Dubrac, Xialin Liu, Feng Zhang
Schlemm's canal (SC) functions to maintain proper intraocular pressure (IOP) by draining aqueous humor and has emerged as a promising therapeutic target for glaucoma, the second-leading cause of irreversible blindness worldwide. However, our current understanding of the mechanisms governing SC development and functionality remains limited. Here, we show that vitronectin (VTN) produced by limbal macrophages promotes SC formation and prevents intraocular hypertension by activating integrin αvβ3 signaling...
February 16, 2024: Cell Reports
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