Focal Spot Size Measurement using Image Quality Indicator: A Case Study

2012 ◽  
Author(s):  
Bassim Aklan ◽  
Inam Ul Ahad ◽  
Rafay Mehmood Siddiqui ◽  
Zeeshan Islam ◽  
Anurag Anurag
Keyword(s):  
Image Quality ◽  
Quality Indicator ◽  
Focal Spot ◽  
Spot Size ◽  
Size Measurement ◽  
Focal Spot Size

Fine focal spot size improves image quality in computed tomography abdomen and pelvis

2016 ◽  
Vol 26 (12) ◽  
pp. 4545-4550 ◽  
Author(s):  
Yin P. Goh ◽  
Kenneth K. Lau ◽  
Keat Low ◽  
Kevin Buchan ◽  
Lawrence Chia Wei Oh ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Focal Spot ◽  
Spot Size ◽  
Focal Spot Size ◽  
Fine Focal Spot

Computational Technique for the Qualification of Focal Spot Size and Shape of Industrial Radioscopy Equipment Using Star Patterns

2020 ◽  
Vol 78 (4) ◽  
pp. 479-486
Author(s):  
Marcela Tatiana Fernandes Beserra ◽  
◽  
Ricardo Tadeu Lopes ◽  
Davi Ferreira de Oliveira ◽  
Claudio Carvalho Conti ◽  
...  
Keyword(s):  
Focal Spot ◽  
Spot Size ◽  
Computational Technique ◽  
Focal Spot Size ◽  
Size And Shape

scholarly journals Dependence of laser accelerated protons on laser energy following the interaction of defocused, intense laser pulses with ultra-thin targets

2011 ◽  
Vol 29 (3) ◽  
pp. 345-351 ◽  
Author(s):  
C.M. Brenner ◽  
J.S. Green ◽  
A.P.L. Robinson ◽  
D.C. Carroll ◽  
B. Dromey ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Focal Spot ◽  
Laser Pulse Energy ◽  
Laser Energy ◽  
Spot Size ◽  
Proton Flux ◽  
Focal Spot Size ◽  
Order Of Magnitude ◽  
Laser Focal Spot ◽  
Accelerated Protons

AbstractThe scaling of the flux and maximum energy of laser-driven sheath-accelerated protons has been investigated as a function of laser pulse energy in the range of 15–380 mJ at intensities of 1016–1018 W/cm2. The pulse duration and target thickness were fixed at 40 fs and 25 nm, respectively, while the laser focal spot size and drive energy were varied. Our results indicate that while the maximum proton energy is dependent on the laser energy and laser spot diameter, the proton flux is primarily related to the laser pulse energy under the conditions studied here. Our measurements show that increasing the laser energy by an order of magnitude results in a more than 500-fold increase in the observed proton flux. Whereas, an order of magnitude increase in the laser intensity generated by decreasing the laser focal spot size, at constant laser energy, gives rise to less than a tenfold increase in observed proton flux.

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