Results 11 to 20 of about 18,577 (196)

Assessment of Normal Intracranial Parameters of the Sellar Region in Healthy Subjects of South Indian Population: A Retrospective Study [PDF]

open access: yesJournal of Clinical and Diagnostic Research, 2022
Introduction: There is a significant degree of anatomical variation at the level of the sphenoid sinus and sella turcica and a wide range of these values have been reported in literature and ethnic variation has also been found to contribute to ...
Deepa Rebecca Korula   +5 more
doaj   +1 more source

Objective Assessment of Visual Field Defects Caused by Optic Chiasm and Its Posterior Visual Pathway Injury [PDF]

open access: yesFayixue Zazhi, 2023
Objective To investigate the characteristics and objective assessment method of visual field defects caused by optic chiasm and its posterior visual pathway injury.
Jian XIANG, Xu WANG, Li-li YU, Kang-jia JIN, Ying-kai YANG
doaj   +1 more source

A quantitative analysis of the retinofugal projections in congenital and late-onset blindness

open access: yesNeuroImage: Clinical, 2021
Vision loss early in life has dramatic consequences on the organization of the visual system and hence on structural plasticity of its remnant components.
Maurice Ptito   +5 more
doaj   +1 more source

Deep Learning-Based Detection of Malformed Optic Chiasms From MRI Images

open access: yesFrontiers in Neuroscience, 2021
Convolutional neural network (CNN) models are of great promise to aid the segmentation and analysis of brain structures. Here, we tested whether CNN trained to segment normal optic chiasms from the T1w magnetic resonance imaging (MRI) image can be also ...
Robert J. Puzniak   +3 more
doaj   +1 more source

Low-Field Magnetic Resonance Imaging Findings in 18 Dogs With Presumed Optic Neuritis

open access: yesFrontiers in Veterinary Science, 2021
Canine optic neuritis has been attributed to a focal or disseminated form of granulomatous meningoencephalitis (GME) amongst other etiologies. Magnetic resonance imaging (MRI) has been proven to help differentiate the structures within the optic nerve ...
Laura Muñiz Moris   +2 more
doaj   +1 more source

Visual disturbances before and after transnasal endoscopic surgery for craniopharyngiomas

open access: yesJournal of Ophthalmology, 2021
Background: Craniopharyngiomas (CP) are benign epithelial tumors of the chiasmal and sellar region and/or the third ventricle region which arise from embryonic remnants of Rathke’s pouch.
K. S. Iegorova   +5 more
doaj   +1 more source

Traumatic chiasmopathy following mild trauma in a patient with thyroid orbitopathy

open access: yesAmerican Journal of Ophthalmology Case Reports, 2021
Purpose: Traumatic injury to the optic chiasm is rare and most frequently caused by high-velocity head trauma. It classically results in bitemporal hemianopsia and often presents in conjunction with multiple other traumatic injuries, such as skull ...
Matthew L. O'Sullivan   +1 more
doaj   +1 more source

Biomechanics of human optic chiasmal compression: ex vivo experiment and finite element modelling

open access: yesMedicine in Novel Technology and Devices, 2022
The mechanism of bitemporal hemianopia arising as a result of chiasmal compression is unknown. In this study, we combined an ex vivo experiment and finite element modelling (FEM) to investigate its potential mechanism.
Xiaofei Wang   +7 more
doaj   +1 more source

Proton Beam Therapy in the Treatment of Periorbital Malignancies [PDF]

open access: yesInternational Journal of Particle Therapy, 2021
Purpose: Periorbital tumor location presents a significant challenge with 3-dimensional conformal radiation therapy or intensity modulated radiation therapy due to high tumor dose needed in the setting of close proximity to orbital structures with lower ...
Nicholas J. Damico, MD   +15 more
doaj   +1 more source

The determination of the pituitary gland, optic chiasm, and intercavernous distance measurements in healthy subjects according to age and gender

open access: yesFolia Morphologica, 2020
Background: This paper was undertaken to determine the morphometry of pituitary gland diameter, pituitary gland height, intercavernous distance, optic chiasm diameter and optic chiasm height in skulls of Turkish population aged between 18 and 60 years ...
S. Ö. Polat   +4 more
doaj   +1 more source

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