High-speed Tomographic Reconstruction Employing Fourier Methods

1997 ◽  
Vol 3 (4) ◽  
pp. 255-274 ◽  
Author(s):  
Stefan Brantner ◽  
Rupert C.D. Young ◽  
David Budgett ◽  
Chris R. Chatwin
Keyword(s):  
High Speed ◽  
Tomographic Reconstruction ◽  
Fourier Methods

scholarly journals Measurement of the Local Sound Pressure on a Bias-Flow Liner Using High-Speed Holography and Tomographic Reconstruction

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 153466-153474 ◽  
Author(s):  
Andres E. Ramos Ruiz ◽  
Johannes Gurtler ◽  
Robert Kuschmierz ◽  
Jurgen W. Czarske
Keyword(s):  
High Speed ◽  
Sound Pressure ◽  
Tomographic Reconstruction ◽  
Bias Flow ◽  
Local Sound

A hybrid tomographic reconstruction algorithm for high speed X-ray tomography

2015 ◽  
Vol 196 ◽  
pp. 27-35 ◽  
Author(s):  
Xiaogang Yang ◽  
J. Ruud van Ommen ◽  
Jasper Schoormans ◽  
Robert F. Mudde
Keyword(s):  
High Speed ◽  
Tomographic Reconstruction ◽  
Reconstruction Algorithm ◽  
X Ray

A visible light high-speed imaging system and tomographic reconstruction of plasma emissivity on the J-TEXT tokamak

2019 ◽  
Vol 146 ◽  
pp. 578-581
Author(s):  
Minghui Xia ◽  
Zhipeng Chen ◽  
Huapu Deng ◽  
Jie Yang ◽  
Lizhi Zhu ◽  
...  
Keyword(s):  
Visible Light ◽  
High Speed ◽  
Imaging System ◽  
Tomographic Reconstruction ◽  
High Speed Imaging

High-Speed Imaging in PAC: Multiple View and Tomographic Reconstruction of Pilot Arcing Transients

2011 ◽  
Vol 39 (11) ◽  
pp. 2916-2917 ◽  
Author(s):  
Vittorio Colombo ◽  
Alessia Concetti ◽  
Emanuele Ghedini ◽  
Matteo Gherardi ◽  
Paolo Sanibondi ◽  
...  
Keyword(s):  
High Speed ◽  
Tomographic Reconstruction ◽  
High Speed Imaging ◽  
Multiple View

New transform to project axisymmetric deflection fields along arbitrary rays

2021 ◽  
Author(s):  
Timothy Sipkens ◽  
S. J. Grauer ◽  
Adam M Steinberg ◽  
S N Rogak ◽  
Patrick Kirchen
Keyword(s):  
High Speed ◽  
Gas Flow ◽  
State Of The Art ◽  
Tomographic Reconstruction ◽  
Quantitative Information ◽  
Target Object ◽  
Line Of Sight ◽  
Reconstruction Algorithms ◽  
Abel Transform ◽  
Axisymmetric Deflection

Abstract Axisymmetric tomography is used to extract quantitative information from line-of-sight measurements of gas flow and combustion fields. For instance, background oriented schlieren (BOS) measurements are typically inverted by tomographic reconstruction to estimate the density field of a high-speed or high-temperature flow. Conventional reconstruction algorithms are based on the inverse Abel transform, which assumes that rays are parallel throughout the target object. However, camera rays are not parallel, and this discrepancy can result in significant errors in many practical imaging scenarios. We present a generalization of the Abel transform for use in tomographic reconstruction of light-ray deflections through an axisymmetric target. The new transform models the exact path of camera rays instead of assuming parallel paths, thereby improving the accuracy of estimates. We demonstrate our approach with a simulated BOS scenario in which we reconstruct noisy synthetic deflection data across a range of camera positions. Results are compared to state-of-the-art Abel-based algorithms. Reconstructions computed using the new transform are consistently more stable and accurate than conventional reconstructions.

scholarly journals A distributed multi-GPU system for high speed electron microscopic tomographic reconstruction

2011 ◽  
Vol 111 (8) ◽  
pp. 1137-1143 ◽  
Author(s):  
Shawn Q. Zheng ◽  
Eric Branlund ◽  
Bettina Kesthelyi ◽  
Michael B. Braunfeld ◽  
Yifan Cheng ◽  
...  
Keyword(s):  
High Speed ◽  
Tomographic Reconstruction ◽  
Electron Microscopic

Microfabrication research at the National Submicron Facility

1983 ◽  
Vol 41 ◽  
pp. 86-89
Author(s):  
E.D. Wolf
Keyword(s):  
Integrated Circuits ◽  
Particle Physics ◽  
High Speed ◽  
New Technology ◽  
High Energy ◽  
High Energy Particle ◽  
New Science ◽  
Wide Range ◽  
Intermediate Domain ◽  
Circuit Function

Most microelectronics devices and circuits operate faster, consume less power, execute more functions and cost less per circuit function when the feature-sizes internal to the devices and circuits are made smaller. This is part of the stimulus for the Very High-Speed Integrated Circuits (VHSIC) program. There is also a need for smaller, more sensitive sensors in a wide range of disciplines that includes electrochemistry, neurophysiology and ultra-high pressure solid state research. There is often fundamental new science (and sometimes new technology) to be revealed (and used) when a basic parameter such as size is extended to new dimensions, as is evident at the two extremes of smallness and largeness, high energy particle physics and cosmology, respectively. However, there is also a very important intermediate domain of size that spans from the diameter of a small cluster of atoms up to near one micrometer which may also have just as profound effects on society as “big” physics.

Vacuum System to Minimize the Specimen Contamination of High-Performance EM

1977 ◽  
Vol 35 ◽  
pp. 68-69
Author(s):  
N. Yoshimura ◽  
K. Shirota ◽  
T. Etoh
Keyword(s):  
Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
High Vacuum ◽  
Vacuum System ◽  
Pump System ◽  
Pumping System ◽  
Diffusion Pump ◽  
Almost All ◽  
Cascade Type

One of the most important requirements for a high-performance EM, especially an analytical EM using a fine beam probe, is to prevent specimen contamination by providing a clean high vacuum in the vicinity of the specimen. However, in almost all commercial EMs, the pressure in the vicinity of the specimen under observation is usually more than ten times higher than the pressure measured at the punping line. The EM column inevitably requires the use of greased Viton O-rings for fine movement, and specimens and films need to be exchanged frequently and several attachments may also be exchanged. For these reasons, a high speed pumping system, as well as a clean vacuum system, is now required. A newly developed electron microscope, the JEM-100CX features clean high vacuum in the vicinity of the specimen, realized by the use of a CASCADE type diffusion pump system which has been essentially improved over its predeces- sorD employed on the JEM-100C.

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