High-resolution optical imaging of the 'Frosty Leo' nebula

1994 ◽  
Vol 106 ◽  
pp. 736 ◽  
Author(s):  
Philip P. Langill ◽  
Sun Kwok ◽  
Bruce J. Hrivnak
Keyword(s):  
High Resolution ◽  
Optical Imaging

VIS-NIR LED Illumination in Backside Circuit Edit and Optical Probing Applications

2012 ◽  
Author(s):  
Shida Tan ◽  
Richard H. Livengood ◽  
Dane Scott ◽  
Roy Hallstein ◽  
Pat Pardy ◽  
...  
Keyword(s):  
High Resolution ◽  
Image Quality ◽  
Optical Imaging ◽  
Narrow Band ◽  
Light Emitting Diode ◽  
Air Gap ◽  
Optical Image ◽  
Proof Of Concept ◽  
Light Emitting ◽  
Optical Probing

Abstract High resolution optical imaging is critical in assisting backside circuit edit (CE) and optical probing navigation. In this paper, we demonstrated improved optical image quality using VIS-NIR narrow band light emitting diode (LED) illumination in various FIB and optical probing platforms. The proof of concept was demonstrated with both common non-contact air gap lenses and solid immersion lenses (SIL).

High-resolution Optical Imaging for Deep-water Archaeology

2021 ◽  
pp. 30-40
Author(s):  
Hanumant Singh ◽  
Christopher Roman ◽  
Oscar Pizarro ◽  
Brendan Foley ◽  
Ryan Eustic ◽  
...  
Keyword(s):  
High Resolution ◽  
Optical Imaging ◽  
Deep Water

Optical imaging with a high-resolution microendoscope to identify sinonasal pathology

2018 ◽  
Vol 39 (4) ◽  
pp. 383-387 ◽  
Author(s):  
Sarah M. Kidwai ◽  
Arjun K. Parasher ◽  
Victor J. Schorn ◽  
Elizabeth G. Demicco ◽  
Rebecca Richards-Kortum ◽  
...  
Keyword(s):  
High Resolution ◽  
Optical Imaging

Intraoperative optical imaging of intrinsic signals: a reliable method for visualizing stimulated functional brain areas during surgery

2013 ◽  
Vol 119 (4) ◽  
pp. 853-863 ◽  
Author(s):  
Stephan B. Sobottka ◽  
Tobias Meyer ◽  
Matthias Kirsch ◽  
Edmund Koch ◽  
Ralf Steinmeier ◽  
...  
Keyword(s):  
High Resolution ◽  
Optical Imaging ◽  
Median Nerve ◽  
Somatosensory Cortex ◽  
Blood Volume ◽  
Brain Areas ◽  
Camera System ◽  
Functional Brain ◽  
Brain Functions ◽  
Stimulation Of

Object Intraoperative optical imaging (IOI) is an experimental technique used for visualizing functional brain areas after surgical exposure of the cerebral cortex. This technique identifies areas of local changes in blood volume and oxygenation caused by stimulation of specific brain functions. The authors describe a new IOI method, including innovative data analysis, that can facilitate intraoperative functional imaging on a routine basis. To evaluate the reliability and validity of this approach, they used the new IOI method to demonstrate visualization of the median nerve area of the somatosensory cortex. Methods In 41 patients with tumor lesions adjacent to the postcentral gyrus, lesions were surgically removed by using IOI during stimulation of the contralateral median nerve. Optical properties of the cortical tissue were measured with a sensitive camera system connected to a surgical microscope. Imaging was performed by using 9 cycles of alternating prolonged stimulation and rest periods of 30 seconds. Intraoperative optical imaging was based on blood volume changes detected by using a filter at an isosbestic wavelength (λ = 568 nm). A spectral analysis algorithm was used to improve computation of the activity maps. Movement artifacts were compensated for by an elastic registration algorithm. For validation, intraoperative conduction of the phase reversal over the central sulcus and postoperative evaluation of the craniotomy site were used. Results The new method and analysis enabled significant differentiation (p < 0.005) between functional and nonfunctional tissue. The identification and visualization of functionally intact somatosensory cortex was highly reliable; sensitivity was 94.4% and specificity was almost 100%. The surgeon was provided with a 2D high-resolution activity map within 12 minutes. No method-related side effects occurred in any of the 41 patients. Conclusions The authors' new approach makes IOI a contact-free and label-free optical technique that can be used safely in a routine clinical setup. Intraoperative optical imaging can be used as an alternative to other methods for the identification of sensory cortex areas and offers the added benefit of a high-resolution map of functional activity. It has great potential for visualizing and monitoring additional specific functional brain areas such as the visual, motor, and speech cortex. A prospective national multicenter clinical trial is currently being planned.

scholarly journals High-Resolution Optical Imaging of Benign and Malignant Mucosa in the Upper Aerodigestive Tract: An Atlas for Image-Guided Surgery

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Lauren L. Levy ◽  
Peter M. Vila ◽  
Richard W. Park ◽  
Richard Schwarz ◽  
Alexandros D. Polydorides ◽  
...  
Keyword(s):  
High Resolution ◽  
Optical Imaging ◽  
Correct Diagnosis ◽  
Aerodigestive Tract ◽  
Upper Aerodigestive Tract ◽  
Normal Epithelium ◽  
Imaging Characteristics ◽  
Tissue Contrast ◽  
Potential Applications ◽  
Margin Detection

Background. High-resolution optical imaging provides real-time visualization of mucosa in the upper aerodigestive tract (UADT) which allows non-invasive discrimination of benign and neoplastic epithelium. The high-resolution microendoscope (HRME) utilizes a fiberoptic probe in conjunction with a tissue contrast agent to display nuclei and cellular architecture. This technology has broad potential applications to intraoperative margin detection and early cancer detection. Methods. Our group has created an extensive image collection of both neoplastic and normal epithelium of the UADT. Here, we present and describe imaging characteristics of benign, dysplastic, and malignant mucosa in the oral cavity, oropharynx, larynx, and esophagus. Results. There are differences in the nuclear organization and overall tissue architecture of benign and malignant mucosa which correlate with histopathologic diagnosis. Different anatomic subsites also display unique imaging characteristics. Conclusion. HRME allows discrimination between benign and neoplastic mucosa, and familiarity with the characteristics of each subsite facilitates correct diagnosis.

High-resolution magneto-optical imaging of critical currents in YBa2Cu3O7− thin films

1998 ◽  
Vol 299 (3-4) ◽  
pp. 215-230 ◽  
Author(s):  
Ch. Jooss ◽  
R. Warthmann ◽  
A. Forkl ◽  
H. Kronmüller
Keyword(s):  
Thin Films ◽  
High Resolution ◽  
Optical Imaging ◽  
Critical Currents

A NEW AND MODERN DIGNOSTIC TECHNIQUE: SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY (SS-OCT)

2013 ◽  
Vol 5 (2) ◽  
pp. 31-33
Author(s):  
Prakash Lokhande
Keyword(s):  
Optical Coherence Tomography ◽  
High Resolution ◽  
Optical Imaging ◽  
Optical Coherence ◽  
Cross Sectional ◽  
Swept Source ◽  
Non Invasive ◽  
Treatment Technologies ◽  
High Resolution Images ◽  
Swept Source Oct

ABSTRACT Innovative technique has been introduced in the field of dentistry for the purpose of diagnosis and treatment. Technologies like laser, composite curing techniques, optical imaging have been utilized in the field of dentistry. OCT(optical coherence tomography) is a recent. technique which creates cross-sectional high resolution images. SS-OCT(Swept -Source optical coherence tomography) is a variant of optical coherence tomography, which provides instant imaging with high resolution, non-invasive and ease of handling. This article provides a overview of Swept -Source OCT and its application in the field of dentistry.

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