Application of High-Energy Photon CT System With Laser-Compton Scattering to Non-Destructive Test

Toyokawa, Hiroyuki; Kanada, H.; Kaihori, T.; Koike, M.; Yamada, Ken‐ichi

doi:10.1109/tns.2008.2006982

Cited by 15 publications

(6 citation statements)

References 13 publications

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“…We can get the angular increment according to the indexes of these two projection images. This method can be expressed by (3).…”

Section: Methods To Determine the Angular Incrementmentioning

confidence: 99%

Methods Determining the Angular Increment of A Continuous Scan Cone-Beam CT System

Jiang

et al. 2010

IEEE Trans. Nucl. Sci.

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X-ray cone-beam computed tomography (CBCT) imaging based on the single circular orbit scan mode has become more and more popular because of its high imaging speed. Generally the X-ray source and detectors are stationary and the scanned object rotates step by step over 360 in this kind of system. In order to improve the imaging efficiency, the step rotation is sometimes replaced by the continuous rotation. For this continuous rotation, if there is an error about the number of projection images over 360 caused by the uncertainty of synchronization between the detector and the mechanical sub-system, the angular increment for the CT reconstruction may not be known exactly. The error will lead to serious artifacts in the CT images. This paper describes two possible methods determining the angular increment. Both of them are based on the statistical similarity among the projection images. They determined the angular increment by calculating the correlation coefficients and the standard deviation of the difference image between the image at 0 and the images at other angular positions. These two methods can verify each other. We performed numerical studies and experiments to demonstrate and validate the proposed approaches. Results in these studies and experiments confirm that the proposed two methods can determine the right projection number and the angular increment. The proposed approaches may find applications in CBCT system with continuous single circular orbit scan mode.

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“…We can get the angular increment according to the indexes of these two projection images. This method can be expressed by (3).…”

Section: Methods To Determine the Angular Incrementmentioning

confidence: 99%

Methods Determining the Angular Increment of A Continuous Scan Cone-Beam CT System

Jiang

et al. 2010

IEEE Trans. Nucl. Sci.

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“…[10] We were able to demonstrate its effectiveness as a measurement technology for infrastructure diagnosis such as for cracks of 0.2 mm width in concrete and CT of cross sections of reinforced steel concrete with 50 cm thickness. [11] Figure 8 shows how the elements are integrated to make a system.…”

Section: Process Of the Selection And Integration Of Technologiesmentioning

confidence: 99%

Application of laser Compton photon beam to nondestructive tests

Toyokawa

2015

Synthesiology English edition

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This paper consists of four chapters. In chapter 2, technical issues will be discussed. Chapter 3 discusses the process of selection and integration of technologies for bridging, in correspondence to (1) ~ (3) listed above. Chapter 4 reflects on the process of selection and integration of the elemental technologies in correspondence to (4), and discusses the efforts spent to achieve the goals and results. 2 Technical issues about laser Compton scattering There are attractive technologies in nuclear physics and elementary particle physics especially in radiation measurement technologies. They are highly sophisticated, and can be applied to industrial technology with some modifications. We applied a method for measuring cross-sections of atoms and nuclear reactions to nondestructive testing via industrial radiography. Industrial radiography is an important technique in improving reliability of industrial products such as automobiles, aircraft, rockets, sintered materials, cast products, and electronic substrates. [1] A high-energy X-ray computerized tomography (CT) system using an electron accelerator that is capable of radiographing a whole engine block at spatial resolution of 2~3 mm has been developed. In infrastructure diagnosis, the technology to inspect roadbeds and bridges on site using a portable electron accelerator has been developed recently. [2] A nondestructive and highly precise method for visualizing reinforcing steel-bars and cracks in concrete structure is strongly demanded in our society.

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“…Thus enhancing PET (positron emission tomography) with an additional gamma, a much better spatial resolution could be obtain. Large penetration, submilimeter dimension, low divergence, tuneable energy are features of ELI-NP gamma beams very suitable for radiography and tomography as non-destructive testing application [19,20] of interest for the large-size and complex products, high resolution investigation in aeronautics, automotive, die-cast or sintered industries, new materials and technologies development, for archaeological artifacts and work of art objects analysis.…”

Section: Applications At Eli-npmentioning

confidence: 99%

Extreme Light Infrastructure: nuclear physics

et al. 2011

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The spectacular progress of electron and heavy-ions acceleration driven by ultra-short high-power laser has opened the way for new methods of investigations in nuclear physics and related fields. On the other hand, upshifting the photon energies of a high repetition TW-class laser through inverse Compton scattering on electron bunches classically accelerated, a high-flux narrow bandwidth gamma beam can be produced. With such a gamma beam in the 1-20 MeV energy range and a two-arms 10-PW class laser system, the pillar of "Extreme Light Infrastructure" to be built in Bucharest will focus on nuclear phenomena and their practical applications. Nuclear structure, nuclear astrophysics, fundamental QED aspects as well as applications in material and life sciences, radioactive waste management and homeland security will be studied using the high-power laser, the gamma beam or combining the two. The article includes a general description of ELI-Nuclear Physics (ELI-NP) facility, an overview of the Physics Case and some details on the few, most representative proposed experiments.

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Application of High-Energy Photon CT System With Laser-Compton Scattering to Non-Destructive Test

Cited by 15 publications

References 13 publications

Methods Determining the Angular Increment of A Continuous Scan Cone-Beam CT System

Methods Determining the Angular Increment of A Continuous Scan Cone-Beam CT System

Application of laser Compton photon beam to nondestructive tests

Extreme Light Infrastructure: nuclear physics

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