Holographic endoscope based on coherent fiber bundles and adaptive optics (Conference Presentation)

2018 ◽  
Author(s):  
Robert Kuschmierz ◽  
Dirk Schubert ◽  
Nektarios Koukourakis ◽  
Jürgen Czarske
Keyword(s):  
Adaptive Optics ◽  
Fiber Bundles

Imaging retinal nerve fiber bundles at ultrahigh-speed and ultrahigh-resolution using OCT with adaptive optics

2010 ◽  
Author(s):  
Omer Pars Kocaoglu ◽  
Barry Cense ◽  
Qiang Wang ◽  
Jeremy Bruestle ◽  
Jason Besecker ◽  
...  
Keyword(s):  
Nerve Fiber ◽  
Adaptive Optics ◽  
Fiber Bundles ◽  
Ultrahigh Resolution ◽  
Retinal Nerve Fiber

scholarly journals Imaging retinal nerve fiber bundles using optical coherence tomography with adaptive optics

2011 ◽  
Vol 51 (16) ◽  
pp. 1835-1844 ◽  
Author(s):  
Omer P. Kocaoglu ◽  
Barry Cense ◽  
Ravi S. Jonnal ◽  
Qiang Wang ◽  
Sangyeol Lee ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Nerve Fiber ◽  
Adaptive Optics ◽  
Fiber Bundles ◽  
Optical Coherence ◽  
Retinal Nerve Fiber

scholarly journals Adaptive Optics Imaging of Healthy and Abnormal Regions of Retinal Nerve Fiber Bundles of Patients With Glaucoma

2015 ◽  
Vol 56 (1) ◽  
pp. 674-681 ◽  
Author(s):  
M. F. Chen ◽  
T. Y. P. Chui ◽  
P. Alhadeff ◽  
R. B. Rosen ◽  
R. Ritch ◽  
...  
Keyword(s):  
Nerve Fiber ◽  
Adaptive Optics ◽  
Fiber Bundles ◽  
Adaptive Optics Imaging ◽  
Retinal Nerve Fiber

scholarly journals High-Resolution Imaging of Retinal Nerve Fiber Bundles in Glaucoma Using Adaptive Optics Scanning Laser Ophthalmoscopy

2013 ◽  
Vol 155 (5) ◽  
pp. 870-881.e3 ◽  
Author(s):  
Kohei Takayama ◽  
Sotaro Ooto ◽  
Masanori Hangai ◽  
Naoko Ueda-Arakawa ◽  
Sachiko Yoshida ◽  
...  
Keyword(s):  
High Resolution ◽  
Nerve Fiber ◽  
Adaptive Optics ◽  
Fiber Bundles ◽  
Scanning Laser ◽  
High Resolution Imaging ◽  
Scanning Laser Ophthalmoscopy ◽  
Resolution Imaging ◽  
Retinal Nerve Fiber

scholarly journals Confocal Adaptive Optics Imaging of Peripapillary Nerve Fiber Bundles: Implications for Glaucomatous Damage Seen on Circumpapillary OCT Scans

2015 ◽  
Vol 4 (2) ◽  
pp. 12 ◽  
Author(s):  
Donald C. Hood ◽  
Monica F. Chen ◽  
Dongwon Lee ◽  
Benjamin Epstein ◽  
Paula Alhadeff ◽  
...  
Keyword(s):  
Nerve Fiber ◽  
Adaptive Optics ◽  
Fiber Bundles ◽  
Glaucomatous Damage ◽  
Adaptive Optics Imaging

Dupuytren's Contracture and Microvessels

1981 ◽  
Vol 39 ◽  
pp. 470-471
Author(s):  
C. W. Klscher ◽  
D. Speer
Keyword(s):  
Hypertrophic Scar ◽  
Active Form ◽  
Scar Tissue ◽  
Vascular Supply ◽  
Fiber Bundles ◽  
Dupuytren’S Contracture ◽  
Palmar Fascia ◽  
Immune Disease ◽  
Dupuytren's Contracture ◽  
Longitudinal Fiber

Dupuytren's Contracture is a nodular proliferation of the longitudinal fiber bundles of palmar fascia with its attendant contraction. The factors attributed to its etiology have included trauma, diabetes, alcoholism, arthritis, and auto-immune disease. The tissue has been observed by electron microscopy and found to contain myofibroblasts.Dupuytren's Contracture constitutes a scar, and as such, excessive collagen can be observed, along with an active form of fibroblast.Previous studies of the hypertrophic scar have led us to propose that integral in the initiation and sustenance of scar tissue is a profusion of microvascular regeneration, much of which becomes and remains occluded producing a hypoxia which stimulates fibroblast synthesis. Thus, when considering a study of Dupuytren's Contracture, we predicted finding occluded microvessels at or near the fascial scarring focus.Three cases of Dupuytren's Contracture yielded similar specimens, which were fixed in Karnovskys fluid for 2 to 20 days. Upon removal of the contracture bands care was taken to include the contiguous fatty and areolar tissue which contain the vascular supply and to identify the junctional area between old and new fascia.

Ultrastructural Features of the Oral Apparatus of Stentor

1976 ◽  
Vol 34 ◽  
pp. 142-143
Author(s):  
Elizabeth F. Howell
Keyword(s):  
Plasma Membrane ◽  
Osmium Tetroxide ◽  
Buccal Cavity ◽  
Fiber Bundles ◽  
Microtubular Root ◽  
Stentor Coeruleus ◽  
Root Fiber

The ultrastructure of the normal oral apparatus of Stentor has not been extensively studied. I report here on the ultrastructure of the buccal cavity of Stentor coeruleus.Stentor coeruleus was fixed in either a buffered mixture of osmium tetroxide and glutaraldehyde, or in buffered glutaraldehyde alone. Cells were then dehydrated and embedded in a mixture of Epon and Araldite.An extensive adoral zone of membranelles surrounds the anterior of the cell, and each membranelle consists of 2 parallel rows of cilia. These extend down into the buccal cavity. Two microtubular root fibers, or nemadesmata (Figs. 2 and 5), extend deeply into the cytoplasm from the base of each ciliary kinetosome. Mitochondria are usually closely associated with the root fiber bundles, and small vesicles are present between the nemadesmata of adjacent kinetosomes (Fig. 5). In the cytopharyngeal, non-ciliated areas of the buccal cavity, microtubular ribbons which extend into the cytoplasm are aligned perpendicular to the plasma membrane of the buccal cavity (Figs. 1 and 2).

Microstructures of SiC and Si3N4 with fibrous inclusions

1986 ◽  
Vol 44 ◽  
pp. 492-493
Author(s):  
N. J. Tighe ◽  
J. Sun ◽  
R.-M. Hu
Keyword(s):  
Vapor Deposition ◽  
Chemical Vapor ◽  
Crack Deflection ◽  
Fiber Bundles ◽  
High Temperature Strength ◽  
Graphite Fiber ◽  
Triple Junctions ◽  
Transmission Electron ◽  
Compact Graphite ◽  
Deposition Techniques

Particles of BN,and C are added in amounts of 1 to 40% to SiC and Si3N4 ceramics in order to improve their mechanical properties. The ceramics are then processed by sintering, hot-pressing and chemical vapor deposition techniques to produce dense products. Crack deflection at the particles can increase toughness. However the high temperature strength and toughness are determined byphase interactions in the environmental conditions used for testing. Examination of the ceramics by transmission electron microscopy has shown that the carbon and boron nitride particles have a fibrous texture. In the sintered aSiC ceramic the carbon appears as graphite fiber bundles in the triple junctions and as compact graphite particles within some grains. Examples of these inclusions are shown in Fig. 1A and B.

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