scholarly journals Anterior segment characteristics in normal and keratoconus eyes evaluated with a combined Scheimpflug/Placido corneal imaging device

2016 ◽  
Vol 28 (3) ◽  
pp. 106-111 ◽  
Author(s):  
Masoud Safarzadeh ◽  
Nader Nasiri
Keyword(s):  
Anterior Segment ◽  
Imaging Device ◽  
Corneal Imaging

Relevance of Swept-Source Anterior Segment Optical Coherence Tomography for Corneal Imaging in Patients With Flap-Related Complications After LASIK

Cornea ◽  
2019 ◽  
Vol 38 (1) ◽  
pp. 93-97 ◽  
Author(s):  
Khaled Abdelazeem ◽  
Mohamed Sharaf ◽  
Mohamed G. A. Saleh ◽  
Ahmed M. Fathalla ◽  
Wael Soliman
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Swept Source ◽  
Corneal Imaging

Assessment of anterior segment measurements using a high-resolution imaging device

2020 ◽  
Vol 17 (9) ◽  
pp. 969-979
Author(s):  
Robert Montés-Micó ◽  
Pedro Tañá-Rivero ◽  
Salvador Aguilar-Córcoles ◽  
Ramón Ruíz-Mesa
Keyword(s):  
High Resolution ◽  
Anterior Segment ◽  
High Resolution Imaging ◽  
Imaging Device ◽  
Resolution Imaging

scholarly journals Clinical Applications of Anterior Segment Optical Coherence Tomography

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Su-Ho Lim
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Part ◽  
Anterior Segment ◽  
Clinical Applications ◽  
Glaucoma Drainage Device ◽  
Optical Coherence ◽  
Imaging Device ◽  
Architectural Analysis ◽  
Corneal Dystrophies ◽  
Device Implantation

Anterior segment optical coherence tomography (AS-OCT) was recently developed and has become a crucial tool in clinical practice. AS-OCT is a noncontact imaging device that provides the detailed structure of the anterior part of the eyes. In this review, the author will discuss the various clinical applications of AS-OCT, such as the normal findings, tear meniscus measurement, ocular surface disease (e.g., pterygium, pinguecula, and scleromalacia), architectural analysis after cataract surgery, post-LASIK keratectasia, Descemet’s membrane detachment, evaluation of corneal graft after keratoplasty, corneal deposits (corneal dystrophies and corneal verticillata), keratitis, anterior segment tumors, and glaucoma evaluation (angle assessment, morphological analysis of the filtering bleb after trabeculectomy, or glaucoma drainage device implantation surgery). The author also presents some interesting cases demonstrated via AS-OCT.

Repeatability of whole-cornea measurements using an anterior segment imaging device based on OCT and Placido-disk

2017 ◽  
Vol 14 (2) ◽  
pp. 169-175 ◽  
Author(s):  
Noelia Martínez-Albert ◽  
José J. Esteve-Taboada ◽  
Robert Montés-Micó
Keyword(s):  
Anterior Segment ◽  
Imaging Device ◽  
Anterior Segment Imaging

Ultimate resolution and information in electron microscopy

1991 ◽  
Vol 49 ◽  
pp. 496-497
Author(s):  
D. Van Dyck
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Transfer Function ◽  
Information Transfer ◽  
Communication Channel ◽  
Structural Information ◽  
Information Rate ◽  
Noise Power ◽  
Signal Power ◽  
Imaging Device

An (electron) microscope can be considered as a communication channel that transfers structural information between an object and an observer. In electron microscopy this information is carried by electrons. According to the theory of Shannon the maximal information rate (or capacity) of a communication channel is given by C = B log2 (1 + S/N) bits/sec., where B is the band width, and S and N the average signal power, respectively noise power at the output. We will now apply to study the information transfer in an electron microscope. For simplicity we will assume the object and the image to be onedimensional (the results can straightforwardly be generalized). An imaging device can be characterized by its transfer function, which describes the magnitude with which a spatial frequency g is transferred through the device, n is the noise. Usually, the resolution of the instrument ᑭ is defined from the cut-off 1/ᑭ beyond which no spadal information is transferred.

Development of imaging plate for a TEM and its characteristics

1989 ◽  
Vol 47 ◽  
pp. 100-101
Author(s):  
N. Mori ◽  
T. Oikawa ◽  
Y. Harada ◽  
J. Miyahara ◽  
T. Matsuo
Keyword(s):  
Dynamic Range ◽  
Protective Layer ◽  
High Sensitivity ◽  
Imaging Plate ◽  
Phosphor Layer ◽  
Imaging Device ◽  
X Ray Imaging ◽  
New Type ◽  
Basic Characteristics ◽  
Reading System

The Imaging Plate (IP) is a new type imaging device, which was developed for diagnostic x ray imaging. We have reported that usage of the IP for a TEM has many merits; those are high sensitivity, wide dynamic range, and good linearity. However in the previous report the reading system was prototype drum-type-scanner, and IP was also experimentally made, which phosphor layer was 50μm thick with no protective layer. So special care was needed to handle them, and they were used only to make sure the basic characteristics. In this article we report the result of newly developed reading, printing system and high resolution IP for practical use. We mainly discuss the characteristics of the IP here. (Precise performance concerned with the reader and other system are reported in the other article.)Fig.1 shows the schematic cross section of the IP. The IP consists of three parts; protective layer, phosphor layer and support.

Imaging Device Is 98% Sensitive for Melanoma

2011 ◽  
Vol 44 (1) ◽  
pp. 32
Author(s):  
MICHELE G. SULLIVAN
Keyword(s):  
Imaging Device

Video Atlas of Anterior Segment Repair and Reconstruction

2019 ◽  
Author(s):  
Amar Agarwal ◽  
Ashar Agarwal ◽  
Ashvin Agarwal ◽  
Athiya Agarwal ◽  
Sreelakshmi P. Amar ◽  
...  
Keyword(s):  
Anterior Segment
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