Tabletop Synchrotron Light Source

Yamada, Hironari; Hasegawa, Daisuke; Yamada, Takanori; Kleev, A. I.; Minkov, Dorian; Miura, Norihiko; Moon, Ahsa; Hirai, T.; Haque, M. M.

doi:10.1016/b978-0-444-53632-7.00604-3

Cited by 7 publications

(5 citation statements)

References 30 publications

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“…The first goes through the development of new coherent x-ray sources. 1 Examples include tabletop synchrotron light sources, 42 where a high energy (∼10 MeV) electron beam is circulated hitting a wire or rod target, and electron-impact liquid-metal-jet hard x-ray sources, where a conventional energy (∼10 to 100 keV) electron beam is focused on a jet of liquid metal, achieving a brilliance at least 1 order of magnitude higher than solid-anode microfocus x-ray tubes. 43,44 In this context, very promising is also the development of Thomson-scattering sources 45,46 that could lead to a possible transition to clinical practice, provided that a large field of view and sufficient flux are obtained.…”

Section: Discussionmentioning

confidence: 99%

Dose and diagnostic performance comparison between phase-contrast mammography with synchrotron radiation and digital mammography: a clinical study report

et al. 2018

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Two dosimetric quantities [mean glandular dose (MGD) and entrance surface air kerma (ESAK)] and the diagnostic performance of phase-contrast mammography with synchrotron radiation (MSR) are compared to conventional digital mammography (DM). Seventy-one patients (age range, 41 to 82 years) underwent MSR after a DM examination if questionable or suspicious breast abnormalities were not clarified by ultrasonography. The MGD and the ESAK delivered in both examinations were evaluated and compared. Two on-site radiologists rated the images in consensus according to the Breast Imaging Reporting and Data System assessment categories, which were then correlated with the final diagnoses by means of statistical generalized linear models (GLMs). Receiver operating characteristic curves were also used to assess the diagnostic performance by comparing the area under the curve (AUC). An important MGD and ESAK reduction was observed in MSR due to the monoenergetic beam. In particular, an average 43% reduction was observed for the MGD and a reduction of more than 50% for the ESAK. GLM showed higher diagnostic accuracy, especially in terms of specificity, for MSR, confirmed by AUC analysis ([Formula: see text]). The study design implied that the population was characterized by a high prevalence of disease and that the radiologists, who read the DM images before referring the patient to MSR, could have been influenced in their assessments. Within these limitations, the use of synchrotron radiation with the phase-contrast technique applied to mammography showed an important dose reduction and a higher diagnostic accuracy compared with DM. These results could further encourage research on the translation of x-ray phase-contrast imaging into the clinics.

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Section: Discussionmentioning

confidence: 99%

Dose and diagnostic performance comparison between phase-contrast mammography with synchrotron radiation and digital mammography: a clinical study report

et al. 2018

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“…The electron beam is directed to a compact storage ring where a convertor target is inserted into the electron orbit [289], see figure 28. This device [290,291] is offered as a range of PPL products branded the MIRRORCLE, operating at electron energies of 1, 4, 6 and 20 MeV [292]. These systems emit high photon flux radiation over a wide range of energies with a source size that can be as small as 4 μm (FWHM), achieving 20 μm resolution in XCT scans [288].…”

Section: Bremsstrahlung From Compact Acceleratorsmentioning

confidence: 99%

Review of high energy x-ray computed tomography for non-destructive dimensional metrology of large metallic advanced manufactured components

et al. 2022

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Advanced manufacturing technologies, led by additive manufacturing, have undergone significant growth in recent years. These technologies enable engineers to design parts with reduced weight while maintaining structural and functional integrity. In particular, metal additive manufacturing parts are increasingly used in application areas such as aerospace, where a failure of a mission-critical part can have dire safety consequences. Therefore, the quality of these components is extremely important. A critical aspect of quality control is dimensional evaluation, where measurements provide quantitative results that are traceable to the standard unit of length, the metre. Dimensional measurements allow designers, manufacturers and users to check product conformity against engineering drawings and enable the same quality standard to be used across the supply chain nationally and internationally. However, there is a lack of development of measurement techniques that provide non-destructive dimensional measurements beyond common non-destructive evaluation focused on defect detection. X-ray computed tomography (XCT) technology has great potential to be used as a non-destructive dimensional evaluation technology. However, technology development is behind the demand and growth for advanced manufactured parts. Both the size and the value of advanced manufactured parts have grown significantly in recent years, leading to new requirements of dimensional measurement technologies. This paper is a cross-disciplinary review of state-of-the-art non-destructive dimensional measuring techniques relevant to advanced manufacturing of metallic parts at larger length scales, especially the use of high energy XCT with source energy of greater than 400 kV to address the need in measuring large advanced manufactured parts. Technologies considered as potential high energy x-ray generators include both conventional x-ray tubes, linear accelerators, and alternative technologies such as inverse Compton scattering sources, synchrotron sources and laser-driven plasma sources. Their technology advances and challenges are elaborated on. The paper also outlines the development of XCT for dimensional metrology and future needs.

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“…The synchrotron with the circular electron orbit is used to accumulate and re-use electron, however generation principle of X-ray does not rely on the synchrotron radiation but on the bremsstrahlung. The X-ray source is called as Mirrorcle [4] and continues the development. A 5 µs electron pulse is bundled into 10 pulses signals.…”

Section: X-ray Sourcementioning

confidence: 99%

Characterization of resolution performance of novel high energy X-CT : eXTRACT

Sato¹,

Abe²,

Takatsuji³

2019

eJNDT

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Characterization of resolution performance by means of MTF for a newly developed high-energy and high-resolution X-ray CT system : eXTRACT is performed. eXTRACT has shown the unique characteristics such as the averaged X-ray energy of 1 MeV and demonstrates the structural resolution performance of 0.1 mm in case line and space periodical structure built by metal and air were scanned. The current study reports the characterization result of the modulation transfer function (MTF). A cylindrical feature made of aluminum is scanned and the MTF is evaluated under several different modes of scan on eXTRACT. A series of experimental data show almost satisfactory results in the spatial resolution performance except for the mode of operation supposed to realize the highest resolution performance. The source of the imperfect performance is identified and solved by redesigning the supporting structure of tungsten wire target built in the X-ray source. The improvement in the resolution performance is experimentally verified. It realizes 29.2 line pair par cm when 1/3 and 3/8 offset scan mode is applied on field of view size of 300 mm in the diameter.

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Tabletop Synchrotron Light Source

Cited by 7 publications

References 30 publications

Dose and diagnostic performance comparison between phase-contrast mammography with synchrotron radiation and digital mammography: a clinical study report

Dose and diagnostic performance comparison between phase-contrast mammography with synchrotron radiation and digital mammography: a clinical study report

Review of high energy x-ray computed tomography for non-destructive dimensional metrology of large metallic advanced manufactured components

Characterization of resolution performance of novel high energy X-CT : eXTRACT

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