Article
Optics
G. Perez-Callejo, V. Bouffetier, L. Ceurvorst, T. Goudal, S. R. Klein, D. Svyatskiy, M. Holec, P. Perez-Martin, K. Falk, A. Casner, T. E. Weber, G. Kagan, M. P. Valdivia
Summary: Diagnosing the evolution of laser-generated high energy density (HED) systems is fundamental to understand the behavior of matter under extreme conditions. Talbot-Lau interferometry was used to probe the ablation front of a laser-irradiated foil, and attenuation and phase-shift images were successfully obtained for electron densities above 10^22 cm^-3. These results demonstrate the capabilities of Talbot-Lau X-ray diagnostic methods to diagnose HED laser-generated plasmas through high-resolution imaging.
HIGH POWER LASER SCIENCE AND ENGINEERING
(2023)
Article
Physics, Fluids & Plasmas
M. P. Valdivia, G. W. Collins, F. Conti, F. N. Beg
Summary: Talbot-Lau x-ray deflectometry (TXD) is used for refraction-based imaging in high-energy-density physics experiments, particularly for diagnosing plasmas related to inertial confinement and magnetic liner inertial fusion. The optimal X-pinch configuration for TXD is found to be the laser-cut X-pinch, which offers high reproducibility, small source size, and short duration.
PLASMA PHYSICS AND CONTROLLED FUSION
(2022)
Article
Multidisciplinary Sciences
Guibin Zan, Sheraz Gul, Jin Zhang, Wei Zhao, Sylvia Lewis, David J. Vine, Yijin Liu, Piero Pianetta, Wenbing Yun
Summary: The study developed a TLI system with MAAST source, offering high-resolution and tri-contrast X-ray imaging for biomedical applications. Tomography of Drum fish tooth revealed valuable complementary structural information using this method.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Instruments & Instrumentation
Masashi Kageyama, Kenichi Okajima, Minoru Maesawa, Masahiro Nonoguchi, Manabu Nonoguchi, Masaru Kuribayashi, Yukihiro Hara, Atsushi Momose
Summary: The study developed and tested a laboratory assembled X-ray phase CT system with high spatial and density resolution, which successfully distinguishes different materials. The system can also switch to another mode with a wider field of view.
JOURNAL OF X-RAY SCIENCE AND TECHNOLOGY
(2021)
Article
Computer Science, Interdisciplinary Applications
Manuel Viermetz, Nikolai Gustschin, Clemens Schmid, Jakob Haeusele, Peter B. Noel, Roland Proksa, Stefan Loscher, Thomas Koehler, Franz Pfeiffer
Summary: Computed tomography (CT) is an important clinical diagnostics method, but its current limit to X-rays' attenuation contrast only can be expanded with dark-field imaging. Dark-field imaging offers access to more tissue properties, such as micro-structural texture or porosity. However, up-scaling this method to clinical scale is complex due to design constraints such as limited manufacturing technology and minimal modifications to the CT gantry. In this study, the advantages of an inverse interferometer and a triangular grating profile are discussed, making a compact and sensitive interferometer implementation feasible. The evaluation of the triangular grating profile reveals a deviation in the interference pattern compared to standard grating profiles, which must be taken into consideration in subsequent data processing.
IEEE TRANSACTIONS ON MEDICAL IMAGING
(2023)
Article
Multidisciplinary Sciences
Pouria Zangi, Katsumasa Ikematsu, Pascal Meyer, Hidekazu Takano, Yanlin Wu, Josephine Gutekunst, Martin Boerner, Arndt Last, Jan G. Korvink, Atsushi Momose
Summary: Grating-based X-ray Talbot interferometry generates phase contrast images of low-contrast objects. However, limited X-ray coherence and manufacturing limitations restrict its application. In this study, we propose an optical configuration that amplifies the beam deflection of samples using a micro-lens array, enhancing the phase signal.
SCIENTIFIC REPORTS
(2023)
Article
Instruments & Instrumentation
M. P. Valdivia, D. Stutman, C. Stoeckl, W. Theobald, G. W. Collins, V Bouffetier, M. Vescovi, C. Mileham, I. A. Begishev, S. R. Klein, R. Melean, S. Muller, J. Zou, F. Veloso, A. Casner, F. N. Beg, S. P. Regan
Summary: C Talbot-Lau x-ray interferometry has been used to map electron density gradients in High Energy Density Physics (HEDP) experiments. X-ray backlighter targets have been evaluated for Talbot-Lau X-ray Deflectometry (TXD). Various copper targets were irradiated by laser pulses and x-pinches, with successful imaging of plasma ablation front through TXD for densities >10(23) cm(-3).
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Computer Science, Interdisciplinary Applications
Manuel Viermetz, Nikolai Gustschin, Clemens Schmid, Jakob Haeusele, Bernhard Gleich, Bernhard Renger, Thomas Koehler, Franz Pfeiffer
Summary: X-ray computed tomography (CT) is an important imaging technique in clinical diagnostics. Dark-field CT, which provides additional microstructural information, has shown potential clinical value. In this paper, the performance of a prototype dark-field CT system is discussed, including the evaluation of the interferometer components and challenges related to integration into the CT gantry. The impact of the X-ray source and vibrations on the system are analyzed, and a beam hardening correction is introduced to enable quantitative dark-field imaging. The resolution and patient dose are also analyzed, and initial patient studies using the presented dark-field CT system are suggested.
IEEE TRANSACTIONS ON MEDICAL IMAGING
(2023)
Article
Engineering, Biomedical
Qisi Lin, Zhao Wu, Guibin Zan, Meng Huang, Zheng Dang, Lijiao Tian, Yong Guan, Gang Liu, Yalin Lu, Yangchao Tian
Summary: This article successfully extends the FOV of compact XTLI and achieves large field of view imaging at high energy by designing and developing an inverse XTLI coupled with a microarray anode-structured target source. Experimental results demonstrate the potential advantage of phase contrast mode in imaging lung tissue.
PHYSICS IN MEDICINE AND BIOLOGY
(2023)
Article
Chemistry, Analytical
Kenneth A. Goldberg, Antoine Wojdyla, Diane Bryant
Summary: New binary-amplitude reflective gratings have been designed and modeled for shearing interferometry and Hartmann wavefront sensing in high-coherent-flux X-ray beamlines. These gratings, compact and capable of withstanding high power densities, can operate across a broad range of photon energies with fixed grating-to-detector distance. Coherent wave-propagation is utilized to study energy bandwidth and set design parameters, enabling effective performance over a wide bandwidth.
Review
Engineering, Biomedical
Lina Felsner, Philipp Roser, Andreas Maier, Christian Riess
Summary: This study compared different methods to correct artifacts in tomographic reconstructions, finding that the iterative reconstruction algorithm, known operator network, and U-net all reduced specific artifacts but exhibited different noise behaviors.
INTERNATIONAL JOURNAL OF COMPUTER ASSISTED RADIOLOGY AND SURGERY
(2021)
Article
Computer Science, Interdisciplinary Applications
Clemens Schmid, Manuel Viermetz, Nikolai Gustschin, Wolfgang Noichl, Jakob Haeusele, Tobias Lasser, Thomas Koehler, Franz Pfeiffer
Summary: X-ray computed tomography (CT) is a valuable imaging technique for non-invasive medical diagnosis. However, it has limitations in imaging soft tissue due to small differences in attenuation. Grating-based X-ray phase-contrast imaging detects additional interaction mechanisms between photons and matter to generate images with different contrast. A processing pipeline is presented to identify and correct fluctuations caused by mechanical vibrations in an interferometer installed on a rotating clinical CT gantry, allowing for vibration-free sample reconstruction.
IEEE TRANSACTIONS ON MEDICAL IMAGING
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Brandon J. Nelson, Shuai Leng, Elisabeth R. Shanblatt, Cynthia H. McCollough, Thomas Koenig
Summary: The study developed a correction strategy to mitigate the effects caused by beam hardening, thereby improving the quality of X-ray imaging.
Article
Instruments & Instrumentation
Yaohu Lei, Faiz Wali, Guiwen Xu, Qiaofei Li, Xin Liu, Muhammad Waqas Ali, Jianheng Huang, Ji Li
Summary: The study introduced a method for preparing curved silicon-based phase gratings, utilizing mechanical stress to bend the silicon-based phase gratings cylindrically, allowing Moire fringes to appear in the entire imaging range. Experimental applications demonstrated that this technology can achieve multi-contrast imaging within the entire 8-inch imaging field.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Astronomy & Astrophysics
K. T. A. Assumin-Gyimah, D. Dutta, D. S. Hussey, W. M. Snow, C. Langlois, V Lee
Summary: The use of transparent test/source masses can benefit future measurements of Newton's gravitational constant G by enabling nondestructive, quantitative internal density gradient measurements using optical interferometry and allowing in-situ optical metrology methods. The upper bound on possible internal density gradients in lead tungstate (PbWO4) crystals was determined using a Talbot-Lau neutron interferometer, indicating that the value is about two orders of magnitude smaller than required for G measurements. Other nondestructive methods for characterization of internal density inhomogeneities in test masses for G experiments are also discussed.
CLASSICAL AND QUANTUM GRAVITY
(2022)
Article
Optics
Naoki Morimoto, Sho Fujino, Amane Yamazaki, Yasuhiro Ito, Takuji Hosoi, Heiji Watanabe, Takayoshi Shimura
Article
Optics
Naoki Morimoto, Sho Fujino, Yasuhiro Ito, Amane Yamazaki, Issei Sano, Takuji Hosoi, Heiji Watanabe, Takayoshi Shimura
Article
Materials Science, Multidisciplinary
T. Shimura, D. Shimokawa, T. Matsumiya, N. Morimoto, A. Ogura, S. Iida, T. Hosoi, H. Watanabe
CURRENT APPLIED PHYSICS
(2012)
Article
Optics
Takayoshi Shimura, Naoki Morimoto, Sho Fujino, Takaharu Nagatomi, Keni-chi Oshima, Jimpei Harada, Kazuhiko Omote, Naohisa Osaka, Takuji Hosoi, Heiji Watanabe
Article
Optics
Naoki Morimoto, Sho Fujino, Ken-ichi Ohshima, Jimpei Harada, Takuji Hosoi, Heiji Watanabe, Takayoshi Shimura
Proceedings Paper
Engineering, Electrical & Electronic
Takayoshi Shimura, Takuya Matsumiya, Naoki Morimoto, Takuji Hosoi, Kentaro Kajiwara, Jun Chen, Takashi Sekiguchi, Heiji Watanabe
DEFECTS-RECOGNITION, IMAGING AND PHYSICS IN SEMICONDUCTORS XIV
(2012)
