The external and internal structures of Amphizoa davidi Lucas (Coleoptera, Amphizoidae), using X-ray phase contrast microtomography

Numerous advances have been made in X-ray technology in recent years. X-ray imaging plays an important role in the nondestructive exploration of the internal structures of objects. However, the contrast of X-ray absorption images remains low, especially for materials with low atomic numbers, such as biological samples. X-ray phase-contrast images have an intrinsically higher contrast than absorption images. In this review, the principles, milestones, and recent progress of X-ray phase-contrast imaging methods are demonstrated. In addition, prospective applications are presented.

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Cretaciella sorianoae gen. et sp. nov. (Coleoptera, Leiodidae, Cholevinae, Oritocatopini), Anophthalmic Species from Albian Amber of the Escucha Formation (Alava, Spain)

Geosciences ◽

10.3390/geosciences9120521 ◽

2019 ◽

Vol 9 (12) ◽

pp. 521 ◽

Cited By ~ 1

Author(s):

Michel Perreau

Keyword(s):

Phase Contrast ◽

Sub Saharan Africa ◽

X Ray ◽

Extant Species ◽

Internal Structures ◽

Sub Saharan

Cretaciella sorianoae gen. et sp. nov. (Coleoptera, Leiodidae, Cholevinae, Oritocatopini) from Albian amber of the Escucha Formation (Alava, Spain) is described and illustrated. This is the first species of Leiodidae from Alava amber and the first Cholevinae from Cretaceous amber. External and internal structures are investigated by propagation phase contrast X-ray microtomography. Based on both external and genital structures, Cretaciella is tentatively placed in the tribe Oritocatopini, the extant species of which occur in Sub-Saharan Africa. This specimen has no visible eyes or hind wings, which suggests an adaptation to subterranean or at least to soil litter environments. The biogeography of the tribe is succinctly discussed.

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Phase-contrast X-ray CT image of breast tumor

Journal of Synchrotron Radiation ◽

10.1107/s0909049597020116 ◽

1998 ◽

Vol 5 (3) ◽

pp. 1133-1135 ◽

Cited By ~ 37

Author(s):

Tohoru Takeda ◽

Atsushi Momose ◽

Ei Ueno ◽

Yuji Itai

Keyword(s):

Breast Tumor ◽

Phase Contrast ◽

Soft Tissues ◽

Ct Images ◽

Human Breast ◽

Human Breast Tumor ◽

Synchrotron Source ◽

X Ray ◽

Optical Images ◽

Internal Structures

Phase-contrast X-ray CT images generated by differences in refractive indices can be used to visualize the internal structures of soft tissues without contrast enhancement. In this study, imaging of human breast tumor was performed on formalin-fixed samples. Experiments were carried out at the synchrotron source of the Photon Factory, Tsukuba, Japan. The X-ray energy was adjusted to 17.7 keV. Phase-contrast X-ray CT images revealed various structures of human breast tumor as clearly as optical images.

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Commentary: Is X-ray Phase Contrast Imaging an Anatomical Klondike for Surgeons?

Seminars in Thoracic and Cardiovascular Surgery ◽

10.1053/j.semtcvs.2020.04.011 ◽

2020 ◽

Vol 32 (4) ◽

pp. 969-970

Author(s):

Sergio A. Carrillo

Keyword(s):

Phase Contrast ◽

Phase Contrast Imaging ◽

Contrast Imaging ◽

X Ray

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Direct observation of weld pool formation and cracking in laser welding of Al alloy by using x-ray phase contrast method

International Congress on Applications of Lasers & Electro-Optics ◽

10.2351/1.5138145 ◽

2017 ◽

Author(s):

Masanori Miyagi ◽

Yousuke Kawahito ◽

Hiroshi Kawakami ◽

Takahisa Shoubu

Keyword(s):

Laser Welding ◽

Weld Pool ◽

Direct Observation ◽

Phase Contrast ◽

Al Alloy ◽

X Ray ◽

Contrast Method ◽

Phase Contrast Method ◽

Pool Formation

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Image Quality Analysis of X-ray Grating Interferometer Using Integrating-bucket Method

Journal of Imaging Science and Technology ◽

10.2352/j.imagingsci.technol.2020.64.2.020503 ◽

2020 ◽

Vol 64 (2) ◽

pp. 20503-1-20503-5

Author(s):

Faiz Wali ◽

Shenghao Wang ◽

Ji Li ◽

Jianheng Huang ◽

Yaohu Lei ◽

...

Keyword(s):

Image Quality ◽

Phase Contrast ◽

Quality Analysis ◽

Phase Contrast Imaging ◽

Phase Image ◽

Contrast Imaging ◽

High Quality ◽

Image Quality Analysis ◽

X Ray ◽

Grating Interferometer

Abstract Grating-based x-ray phase-contrast imaging has the potential to enhance image quality and provide inner structure details non-destructively. In this work, using grating-based x-ray phase-contrast imaging system and employing integrating-bucket method, the quantitative expressions of signal-to-noise ratios due to photon statistics and mechanical error are analyzed in detail. Photon statistical noise and mechanical error are the main sources affecting the image noise in x-ray grating interferometry. Integrating-bucket method is a new phase extraction method translated to x-ray grating interferometry; hence, its image quality analysis would be of great importance to get high-quality phase image. The authors’ conclusions provide an alternate method to get high-quality refraction signal using grating interferometer, and hence increases applicability of grating interferometry in preclinical and clinical usage.

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