Results 41 to 50 of about 477,223 (297)

Interlaced X-ray diffraction computed tomography [PDF]

, 2016
An X-ray diffraction computed tomography data-collection strategy that allows, post experiment, a choice between temporal and spatial resolution is reported.
Beale, AM, Cernik, RJ, Di Michiel, M, Jacques, SDM, Middelkoop, V, Senecal, P, Vamvakeros, A   +6 more
core   +1 more source

Algorithms for joint activity–attenuation estimation from positron emission tomography scatter

EJNMMI Physics, 2019
Background Attenuation correction in positron emission tomography remains challenging in the absence of measured transmission data. Scattered emission data may contribute missing information, but quantitative scatter-to-attenuation (S2A) reconstruction ...
Yannick Berker, Volkmar Schulz, Joel S. Karp   +2 more
doaj   +1 more source

Switchable resolution in soft x-ray tomography of single cells. [PDF]

, 2020
The diversity of living cells, in both size and internal complexity, calls for imaging methods with adaptable spatial resolution. Soft x-ray tomography (SXT) is a three-dimensional imaging technique ideally suited to visualizing and quantifying the ...
Chao, Weilun, Chen, Jian-Hua, Ekman, Axel A, Guo, Jessica, Hammel, Michal, Larabell, Carolyn A, Le Gros, Mark A, McDermott, Gerry, Oh, Sharon, Remesh, Soumya G, Weinhardt, Venera   +10 more
core   +1 more source

X-ray tomography methods [PDF]

, 2023
Computed tomography is the reconstruction of a cross sectional slice of, or a volume of, an object from a series of projections. Traditionally, this is an image of the X-ray attenuation coefficient, but there are now a plethora of techniques which reconstruct different types of information to form a three-dimensional (3D) image.
Cernik, Robert, King, Andrew, Ludwig, Wolfgang, Olivo, Alessandro, Withers, Philip J.   +4 more
openaire   +1 more source

High-speed X-ray ptychographic tomography

Scientific Reports, 2022
X-ray ptychography is a coherent scanning imaging technique widely used at synchrotron facilities for producing quantitative phase images beyond the resolution limit of conventional x-ray optics.
Darren Batey, Christoph Rau, Silvia Cipiccia   +2 more
doaj   +1 more source

Clinical Characteristics and Prognostic Risk Factors for Pediatric B‐Cell Lymphoblastic Lymphoma: A Multicenter Retrospective Cohort Study for China Net Childhood Lymphoma

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background B‐cell lymphoblastic lymphoma (B‐LBL) represents a rare variety of non‐Hodgkin lymphoma, with limited research on its biology, progression, and management. Methods A retrospective analysis was performed on the clinical characteristics of 256 patients aged ≤18 years who received treatment under the China Net Childhood Lymphoma (CNCL)‐
Zhijuan Liu, Jian Wang, Ling Jin, Yanlong Duan, Fu Li, Yueping Jia, Leping Zhang, Xiaojun Yuan, Wei Liu, Ying Liu, Ansheng Liu, Mincui Zheng, Yunpeng Dai, Lian Jiang, Lirong Sun, Xiaowen Zhai, Rong Liu, Chunju Zhou, Zifen Gao, Yonghong Zhang, Xiaomei Yang   +20 more
wiley   +1 more source

X-ray Micro-CT based characterization of rock cuttings with deep learning

Applied Computing and Geosciences
Rock cuttings from destructive boreholes are a common and cheaper source of drilling materials that can be used to determine underground geology compared to rock core samples.
Nils Olsen, Yifeng Chen, Pascal Turberg, Alexandre Moreau, Alexandre Alahi   +4 more
doaj   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

X‐ray Stain Localization with Near‐Field Ptychographic Computed Tomography

Advanced Science, 2022
Although X‐ray contrast agents offer specific characteristics in terms of targeting and attenuation, their accumulation in the tissue on a cellular level is usually not known and difficult to access, as it requires high resolution and sensitivity.
Kirsten Taphorn, Madleen Busse, Johannes Brantl, Benedikt Günther, Ana Diaz, Mirko Holler, Martin Dierolf, Doris Mayr, Franz Pfeiffer, Julia Herzen   +9 more
doaj   +1 more source

The anti‐CRISPR protein AcrIE8.1 inhibits the type I‐E CRISPR‐Cas system by directly binding to the Cascade subunit Cas11

FEBS Letters, EarlyView.
In this study, we present the structure of AcrIE8.1, a previously uncharacterized anti‐CRISPR protein that inhibits the type I‐E CRISPR‐Cas system. Through a combination of structural and biochemical analyses, we demonstrate that AcrIE8.1 directly binds to the Cas11 subunit of the Cascade complex to inhibit the CRISPR‐Cas system.
Young Woo Kang, Hyun Ho Park
wiley   +1 more source