Pincushion distortion correction in x-ray imaging with an image intensifier

2009 ◽  
Author(s):  
Tong Liu ◽  
A. A. Malcolm ◽  
Jian Xu
Keyword(s):  
Image Intensifier ◽  
Distortion Correction ◽  
X Ray ◽  
X Ray Imaging

Quantitative Aspects of Image Intensifier- Television-Based Digital X-Ray Imaging

1986 ◽  
pp. 83-132 ◽  
Author(s):  
O. Nalcioglu ◽  
W. W. Roeck ◽  
J. A. Seibert ◽  
A. V. Lando ◽  
J. M. Tobis ◽  
...  
Keyword(s):  
Image Intensifier ◽  
X Ray ◽  
X Ray Imaging

scholarly journals Fast Tangentially Viewed Soft X-Ray Imaging System Based on Image Intensifier with Microchannel Plate Detector on QUEST

2019 ◽  
Vol 14 (0) ◽  
pp. 1402128-1402128
Author(s):  
Canbin HUANG ◽  
Kazuaki HANADA ◽  
Kengoh KURODA ◽  
Shinichro KOJIMA ◽  
Hiroaki FUJIYOSHI ◽  
...  
Keyword(s):  
Imaging System ◽  
Image Intensifier ◽  
Microchannel Plate ◽  
X Ray ◽  
X Ray Imaging

scholarly journals X-Ray Imaging Calibration for Fuel-Coolant Interaction Experimental Facilities

2021 ◽  
Vol 253 ◽  
pp. 06005
Author(s):  
Christophe Journeau ◽  
Michael Johnson ◽  
Shifali Singh ◽  
Fréderic Payot ◽  
Ken-ichi Matsuba ◽  
...  
Keyword(s):  
Test Section ◽  
High Speed ◽  
Limit Of Detection ◽  
Image Intensifier ◽  
Precise Determination ◽  
Severe Accident ◽  
X Ray ◽  
X Ray Imaging ◽  
Experimental Facilities ◽  
Lower Limits

During a severe accident in either sodium-cooled or water-cooled nuclear reactors, jets of molten nuclear fuel may impinge on the coolant resulting in fuel-coolant interactions (FCI). Experimental programs are being conducted to study this phenomenology and to support the development of severe accident models. Due to the optical opacity of the test section walls, sodium coolant, and the apparent optical opacity of water in the presence of intense ebullition, high-speed X-ray imaging is the preferred technique for FCI visualization. The configuration of these X-ray imaging systems, whereby the test section is installed between a fan-beam X-ray source and a scintillator-image intensifier projecting an image in the visual spectrum onto a high-speed camera, entails certain imaging artefacts and uncertainties. The X-ray imaging configuration requires precise calibration to enable detailed quantitative characterization of the FCI. To this end, ‘phantom’ models have been fabricated using polyethylene, either steel or hafnia powder, and empty cavities to represent sodium, molten fuel and sodium vapor phases respectively. A checkerboard configuration of the phantom enables calibration and correction for lens distortion artefacts which magnify features towards the edge of the field of view. Polydisperse steel ball configurations enable precise determination of the lower limit of detection and the estimation of parallax errors which introduce uncertainty in an object’s silhouette dimensions. Calibration experiments at the MELT facility determined lower limits of detection in the order of 4 mm for steel spheres, and 1.7-3.75 mm for vapor films around a molten jet.

Projection-angle-dependent distortion correction in high-speed image-intensifier-based x-ray computed tomography

2020 ◽  
Vol 32 (3) ◽  
pp. 035404
Author(s):  
Joaquim G Sanctorum ◽  
Sam Van Wassenbergh ◽  
Van Nguyen ◽  
Jan De Beenhouwer ◽  
Jan Sijbers ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Speed ◽  
Image Intensifier ◽  
Distortion Correction ◽  
X Ray ◽  
X Ray Computed ◽  
Projection Angle

Time-resolved X-ray PIV technique for diagnosing opaque biofluid flow with insufficient X-ray fluxes

2013 ◽  
Vol 20 (3) ◽  
pp. 498-503 ◽  
Author(s):  
Sung Yong Jung ◽  
Han Wook Park ◽  
Bo Heum Kim ◽  
Sang Joon Lee
Keyword(s):  
Temporal Resolution ◽  
Exposure Time ◽  
High Speed ◽  
Light Flux ◽  
Image Intensifier ◽  
Time Resolved ◽  
X Ray ◽  
Physiological Conditions ◽  
Blood Flows ◽  
X Ray Imaging

X-ray imaging is used to visualize the biofluid flow phenomena in a nondestructive manner. A technique currently used for quantitative visualization is X-ray particle image velocimetry (PIV). Although this technique provides a high spatial resolution (less than 10 µm), significant hemodynamic parameters are difficult to obtain under actual physiological conditions because of the limited temporal resolution of the technique, which in turn is due to the relatively long exposure time (∼10 ms) involved in X-ray imaging. This study combines an image intensifier with a high-speed camera to reduce exposure time, thereby improving temporal resolution. The image intensifier amplifies light flux by emitting secondary electrons in the micro-channel plate. The increased incident light flux greatly reduces the exposure time (below 200 µs). The proposed X-ray PIV system was applied to high-speed blood flows in a tube, and the velocity field information was successfully obtained. The time-resolved X-ray PIV system can be employed to investigate blood flows at beamlines with insufficient X-ray fluxes under specific physiological conditions. This method facilitates understanding of the basic hemodynamic characteristics and pathological mechanism of cardiovascular diseases.

Parameters of a high‐sensitive x‐ray imaging detector on the basis of an electro‐optical image intensifier and an image vidicon (abstract)

1989 ◽  
Vol 60 (7) ◽  
pp. 2334-2334
Author(s):  
V. A. Karpenko ◽  
A. D. Khil’chenko ◽  
A. P. Lysenko ◽  
V. E. Panchenko
Keyword(s):  
Image Intensifier ◽  
Optical Image ◽  
X Ray ◽  
X Ray Imaging ◽  
Imaging Detector
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