Design and performance investigation of a multi-pinhole collimator for a small field of view gamma imaging system

2014 ◽  
Vol 64 (7) ◽  
pp. 970-975 ◽  
Author(s):  
Jaekeon Bae ◽  
Seungbin Bae ◽  
Kisung Lee ◽  
Yong Choi ◽  
Yongkwon Kim ◽  
...  
Keyword(s):  
Imaging System ◽  
Field Of View ◽  
Small Field ◽  
Gamma Imaging ◽  
Pinhole Collimator ◽  
And Performance ◽  
Small Field Of View

Experimental evaluation of a multi-pinhole collimator for a small organ by using a small-field-of-view gamma camera

2017 ◽  
Vol 70 (4) ◽  
pp. 416-423
Author(s):  
Jaekeon Bae ◽  
Seungbin Bae ◽  
Young-Jun Jung ◽  
Kisung Lee ◽  
Yongkwon Kim ◽  
...  
Keyword(s):  
Experimental Evaluation ◽  
Gamma Camera ◽  
Field Of View ◽  
Small Field ◽  
Pinhole Collimator ◽  
Small Field Of View

Two-level multi-pinhole collimator for SPECT imaging using a small-field-of-view gamma camera

2017 ◽  
Vol 70 (2) ◽  
pp. 192-200 ◽  
Author(s):  
Jaekeon Bae ◽  
Seungbin Bae ◽  
Soo-young Lee ◽  
Kisung Lee ◽  
Yongkwon Kim ◽  
...  
Keyword(s):  
Gamma Camera ◽  
Spect Imaging ◽  
Field Of View ◽  
Small Field ◽  
Pinhole Collimator ◽  
Small Field Of View

Very High Resolution Analysis of the Dynamics of a Coronal Plasmoid

1994 ◽  
Vol 144 ◽  
pp. 593-596
Author(s):  
O. Bouchard ◽  
S. Koutchmy ◽  
L. November ◽  
J.-C. Vial ◽  
J. B. Zirker
Keyword(s):  
High Resolution ◽  
Solar Eclipse ◽  
Total Solar Eclipse ◽  
Field Of View ◽  
Small Field ◽  
High Resolution Analysis ◽  
Ccd Observations ◽  
Resolution Analysis ◽  
Very High ◽  
Small Field Of View

AbstractWe present the results of the analysis of a movie taken over a small field of view in the intermediate corona at a spatial resolution of 0.5“, a temporal resolution of 1 s and a spectral passband of 7 nm. These CCD observations were made at the prime focus of the 3.6 m aperture CFHT telescope during the 1991 total solar eclipse.

Improvement in imaging common temporal bone pathologies at 3 T MRI: small structures benefit from a small field of view

2017 ◽  
Vol 72 (3) ◽  
pp. 267.e1-267.e12 ◽  
Author(s):  
M. Schulze ◽  
K. Reimann ◽  
A. Seeger ◽  
U. Klose ◽  
U. Ernemann ◽  
...  
Keyword(s):  
Temporal Bone ◽  
Field Of View ◽  
Small Field ◽  
Small Field Of View

scholarly journals Study on project trajectory of air-to-ground missile with strapdown seeker under multi constraints

2021 ◽  
Vol 39 (1) ◽  
pp. 141-147
Author(s):  
Junmin Zhao ◽  
Cong Nie ◽  
Guannan Chang ◽  
Meibo Lyu ◽  
Xinguo Li
Keyword(s):  
Good Condition ◽  
Field Of View ◽  
Small Field ◽  
Target Acquisition ◽  
Moving Targets ◽  
Proportional Navigation ◽  
Terminal Stage ◽  
Guidance Law ◽  
Terminal Guidance ◽  
Small Field Of View

The air-to-ground missile with strapdown seeker may have the problems, including small field of view(FOV), limited overload, and fall angle constraint. To solve the above mentioned problem, a phased guidance scheme is proposed. In this scheme, the attack trajectory is divided into the following six stages, including glided stage, fall angle constraint stage, target acquisition and adjustment stage, terminal guidance stage and blind zone stage. The glided stage is designed to increase range, the terminal fall angle is attained ahead of time at fall angle constraint stage. The aim of target acquisition and adjustment stage is to adjust the missile attitude, so that the target will fall within the FOV of the seeker. It creates good condition to capture the target for strapdown seeker. In the terminal stage, the guidance law of proportional navigation and attitude track are used to fit the needs of FOV constraint and attack accuracy. The simulation result shows that the project trajectory can solve the application of attacking moving targets for air-to-ground missile with strapdown seeker under multi constraints.

Transmission Microscopic Moire´ Interferometry for Nanoscale Deformation Measurements

2003 ◽  
Author(s):  
C. W. Han ◽  
S. Cho ◽  
B. Han
Keyword(s):  
Spatial Resolution ◽  
Optical Method ◽  
Moiré Interferometry ◽  
Field Of View ◽  
Moire Interferometry ◽  
Small Field ◽  
Accurate Analysis ◽  
Full Field ◽  
Deformation Measurements ◽  
Small Field Of View

Moire´ interferometry is a full-field optical method that has high displacement, strain and spatial resolution. The method has been used extensively for deformation analyses in the various fields of mechanics. Special considerations arise when deformation measurements of tiny specimens or tiny regions of larger specimens are sought. The relative displacements within a small field of view will be small (even if the strains are not small), so the number of morie´ fringes might not be enough for an accurate analysis.

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