scholarly journals Characterization of beam dynamics in the APS injector rings using time-resolved imaging techniques

2002 ◽  
Author(s):  
B.X. Yang ◽  
A.H. Lumpkin ◽  
M. Borland ◽  
K. Harkay ◽  
A. Nassiri
Keyword(s):  
Imaging Techniques ◽  
Beam Dynamics ◽  
Time Resolved ◽  
Time Resolved Imaging

Thermal Characterization of Heat Sink Adhesive Systems for Spacecraft Electronics by Time-Resolved Infrared Radiometry

1993 ◽  
Vol 115 (1) ◽  
pp. 101-105 ◽  
Author(s):  
J. W. M. Spicer ◽  
M. G. Bevan ◽  
W. D. Kerns ◽  
H. S. Feldmesser
Keyword(s):  
Thermal Cycling ◽  
Heat Sink ◽  
Imaging Techniques ◽  
Thermal Characterization ◽  
Adhesive Systems ◽  
Time Resolved ◽  
X Ray Imaging ◽  
Destructive Analysis ◽  
Infrared Radiometry

A new thermal characterization technique, time-resolved infrared radiometry (TRIR), is used to investigate three different heat sink adhesive systems used in spacecraft electronics - a filled epoxy, a filled silicone and a tape adhesive. Measurements of heat sink efficiency are presented as a function of thermal cycling and the TRIR results are compared with ultrasonic and X-ray imaging techniques and with destructive analysis. The TRIR technique is shown to provide a measure of the relative heat sink capabilities of the different systems and can detect subsurface delamination in the filled epoxy system resulting from the development of cracks due to thermal cycling.

scholarly journals Latent Fingerprint Detection with SYPRO®Rose Plus Protein Blot Stain

2002 ◽  
Vol 2 ◽  
pp. 542-545 ◽  
Author(s):  
Kimberly K. Bouldin ◽  
E. Roland Menzel
Keyword(s):  
Lanthanide Complexes ◽  
Imaging Techniques ◽  
Smooth Surfaces ◽  
Time Resolved ◽  
Latent Fingerprint ◽  
Background Fluorescence ◽  
Use Of Time ◽  
Time Resolved Imaging ◽  
Fingerprint Detection ◽  
Porous Substrates

Lanthanide complexes are employed in photoluminescence detection of fingerprints because their long luminescence lifetimes allow use of time-resolved imaging techniques to suppress problematic background fluorescence. To date, however, these complexes have been unsuccessful when used in developing old fingerprints on porous substrates. SYPRO®Rose Plus Protein Blot Stain remedies this shortcoming; it lends itself to smooth surfaces as well, thus having potential as a universal fingerprint reagent.

scholarly journals Coherent imaging at the diffraction limit

2014 ◽  
Vol 21 (5) ◽  
pp. 1011-1018 ◽  
Author(s):  
Pierre Thibault ◽  
Manuel Guizar-Sicairos ◽  
Andreas Menzel
Keyword(s):  
Three Dimensions ◽  
Coherent Imaging ◽  
Field Methods ◽  
Diffractive Imaging ◽  
Time Resolved ◽  
Full Field ◽  
X Ray ◽  
Coherent Diffractive Imaging ◽  
Time Resolved Imaging

X-ray ptychography, a scanning coherent diffractive imaging technique, holds promise for imaging with dose-limited resolution and sensitivity. If the foreseen increase of coherent flux by orders of magnitude can be matched by additional technological and analytical advances, ptychography may approach imaging speeds familiar from full-field methods while retaining its inherently quantitative nature and metrological versatility. Beyond promises of high throughput, spectroscopic applications in three dimensions become feasible, as do measurements of sample dynamics through time-resolved imaging or careful characterization of decoherence effects.

Dynamic, Time-Resolved Computed Tomography Angiography Technique to Characterize Aortic Endoleak Type, Inflow and Provide Guidance for Targeted Treatment

2021 ◽  
pp. 152660282110379
Author(s):  
Marton Berczeli ◽  
Alan B. Lumsden ◽  
Su Min Chang ◽  
Charudatta S. Bavare ◽  
Ponraj Chinnadurai
Keyword(s):  
Image Guidance ◽  
Imaging Techniques ◽  
Targeted Treatment ◽  
Multiple Time ◽  
Type I ◽  
Ct Scanner ◽  
Time Resolved ◽  
Time To Peak ◽  
Time Resolved Imaging ◽  
Dynamic Time

Purpose: To illustrate dynamic, time-resolved CTA (d-CTA) imaging technique in characterizing aortic endoleak type/inflow using quantitative parameters and its value in providing image guidance for targeted treatment approach. Technique: Dedicated endoleak protocol involved acquiring multiple time-resolved contrast enhanced scans using third-generation CT scanner (Somatom Force®, Siemens Healthineers). Parameters such as scan field of view (FOV), kV, number/timing of scans were customized based on patient’s body-mass-index, timing bolus, and prior imaging findings. D-CTA image datasets were evaluated qualitatively and quantitatively using time-attenuation curves (TAC) analysis after motion correction using a dedicated software ( syngo.via®, Siemens). D-CTA findings from 4 illustrative cases demonstrating type I, type II (inferior mesenteric and lumbar artery inflow), and type III endoleak were illustrated. TAC analysis with time to peak parameter enabled better characterization of endoleak type and inflow. During endoleak intervention, target vessels from d-CTA images were electronically annotated and overlaid on fluoroscopy using 2D−3D image fusion to provide image guidance for targeted treatment. Conclusion: D-CTA imaging with TAC analysis characterizes aortic endoleak type and inflow, in addition to providing image guidance for targeted endoleak treatment. Such dynamic, time-resolved imaging techniques may provide further insights into understanding aortic endoleak that remains an Achilles heel for endovascular aortic aneurysm repair.

Quantitative nano-characterization of heterogeneous catalysts

1995 ◽  
Vol 53 ◽  
pp. 398-399
Author(s):  
P.A. Crozier ◽  
M. Pan
Keyword(s):  
Heterogeneous Catalysts ◽  
Low Dose ◽  
Imaging Techniques ◽  
Structural Features ◽  
Catalyst Characterization ◽  
New Developments ◽  
Double Phase ◽  
Phase Systems ◽  
Dose Imaging

Heterogeneous catalysts can be of varying complexity ranging from single or double phase systems to complicated mixtures of metals and oxides with additives to help promote chemical reactions, extend the life of the catalysts, prevent poisoning etc. Although catalysis occurs on the surface of most systems, detailed descriptions of the microstructure and chemistry of catalysts can be helpful for developing an understanding of the mechanism by which a catalyst facilitates a reaction. Recent years have seen continued development and improvement of various TEM, STEM and AEM techniques for yielding information on the structure and chemistry of catalysts on the nanometer scale. Here we review some quantitative approaches to catalyst characterization that have resulted from new developments in instrumentation.HREM has been used to examine structural features of catalysts often by employing profile imaging techniques to study atomic details on the surface. Digital recording techniques employing slow-scan CCD cameras have facilitated the use of low-dose imaging in zeolite structure analysis and electron crystallography. Fig. la shows a low-dose image from SSZ-33 zeolite revealing the presence of a stacking fault.

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