Viktor Nikitin
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View article: Pyramidal soma size in the anterior cingulate cortex is small in schizophrenia and correlates with hallucination score
Pyramidal soma size in the anterior cingulate cortex is small in schizophrenia and correlates with hallucination score Open
Volumetric reduction of gray matter has repeatedly been reported for schizophrenia. Although meta-analyses of imaging studies revealed the macroscopic reduction of the anterior cingulate cortex in schizophrenia, its mechanism at the cellul…
View article: Nano-laminography with a transmission X-ray microscope
Nano-laminography with a transmission X-ray microscope Open
Nano-laminography combines the penetrating power of hard X-rays with a tilted rotational geometry to deliver high-resolution, three-dimensional images of laterally extended, flat specimens that are otherwise incompatible with, or difficult…
View article: Structural differences between human and mouse neurons and their implementation in generative AIs
Structural differences between human and mouse neurons and their implementation in generative AIs Open
Mouse and human brains have different functions that depend on their neuronal networks. We analyzed nanometer-scale three-dimensional structures of brain tissues of the mouse medial prefrontal cortex and compared them with structures of th…
View article: Cathode Upcycling for Direct Recycling of Lithium‐Ion Batteries Using a Precipitation Approach
Cathode Upcycling for Direct Recycling of Lithium‐Ion Batteries Using a Precipitation Approach Open
With the increased production of electric vehicles to reduce carbon emissions, the lithium‐ion battery market to supply those vehicles has grown dramatically. To enhance battery sustainability and circularity, direct recycling methods aim …
View article: Phasebook: A Survey of Selected Open Problems in Phase Retrieval
Phasebook: A Survey of Selected Open Problems in Phase Retrieval Open
Phase retrieval is an inverse problem that, on one hand, is crucial in many applications across imaging and physics, and, on the other hand, leads to deep research questions in theoretical signal processing and applied harmonic analysis. T…
View article: X-ray nano-CT: A road towards 4D nanoscale data in Earth Science
X-ray nano-CT: A road towards 4D nanoscale data in Earth Science Open
X-ray nano-computed tomography (nano-CT) is an established method to obtain 3D spatial image information in static systems. This method has enabled researchers to access ever finer details of complex bulk structures in various fields. With…
View article: Murine AI excels at cats and cheese: Structural differences between human and mouse neurons and their implementation in generative AIs
Murine AI excels at cats and cheese: Structural differences between human and mouse neurons and their implementation in generative AIs Open
Mouse and human brains have different functions that depend on their neuronal networks. In this study, we analyzed nanometer-scale three-dimensional structures of brain tissues of the mouse medial prefrontal cortex and compared them with s…
View article: X-ray nano-holotomography reconstruction with simultaneous probe retrieval
X-ray nano-holotomography reconstruction with simultaneous probe retrieval Open
In conventional tomographic reconstruction, the pre-processing step includes flat-field correction, where each sample projection on the detector is divided by a reference image taken without the sample. When using coherent X-rays as a prob…
View article: Single-distance nano-holotomography with coded apertures
Single-distance nano-holotomography with coded apertures Open
High-resolution phase-contrast 3D imaging using nano-holotomography typically requires collecting multiple tomograms at varying sample-to-detector distances, usually 3 to 4. This multi-distance approach significantly limits temporal resolu…
View article: X-ray nano-holotomography reconstruction with simultaneous probe retrieval
X-ray nano-holotomography reconstruction with simultaneous probe retrieval Open
In conventional tomographic reconstruction, the pre-processing step includes flat-field correction, where each sample projection on the detector is divided by a reference image taken without the sample. When using coherent X-rays as probe,…
View article: Characterization of Incremental Markings in the Sagittal Otolith of the Pacific Sardine (Sardinops sagax) Using Different Imaging Modalities
Characterization of Incremental Markings in the Sagittal Otolith of the Pacific Sardine (Sardinops sagax) Using Different Imaging Modalities Open
Teleost fish possess calcium carbonate otoliths located in separate chambers (utriculus, sacculus, and lagena) of their membranous labyrinth. This study analyzed the surface topography of the sagittal otolith of the Pacific sardine (Sardin…
View article: Bismuth pyramid formation during solidification of eutectic tin-bismuth alloy using 4D X-ray microtomography
Bismuth pyramid formation during solidification of eutectic tin-bismuth alloy using 4D X-ray microtomography Open
Next-generation electronic packaging strategies like heterogeneous integration packaging necessitate low melting temperature solder alloys. The Sn-58Bi alloy is notable candidate for its low melting point, but the development of coarse Bi …
View article: Laminography as a tool for imaging large-size samples with high resolution
Laminography as a tool for imaging large-size samples with high resolution Open
Despite the increased brilliance of the new generation synchrotron sources, there is still a challenge with high-resolution scanning of very thick and absorbing samples, such as a whole mouse brain stained with heavy elements, and, extendi…
View article: Accelerated Laminographic Image Reconstruction Using GPUs
Accelerated Laminographic Image Reconstruction Using GPUs Open
Laminography is a specialized 3D imaging technique optimized for examining flat, elongated structures. Laminographic reconstruction is the process of generating 3D volume from a set of 2D projections that are collected during the laminogra…
View article: Laminography as a tool for imaging large-size samples with high resolution
Laminography as a tool for imaging large-size samples with high resolution Open
Despite the increased brilliance of the new generation synchrotron sources, there is still a challenge with high-resolution scanning of very thick and absorbing samples, such as the whole mouse brain stained with heavy elements, and, exten…
View article: A hybrid machine-learning approach for analysis of methane hydrate formation dynamics in porous media with synchrotron CT imaging
A hybrid machine-learning approach for analysis of methane hydrate formation dynamics in porous media with synchrotron CT imaging Open
Fast multi-phase processes in methane hydrate bearing samples pose a challenge for quantitative micro-computed tomography study and experiment steering due to complex tomographic data analysis involving time-consuming segmentation procedur…
View article: Carbonate Coprecipitation for Cd and Zn Treatment and Evaluation of Heavy Metal Stability Under Acidic Conditions
Carbonate Coprecipitation for Cd and Zn Treatment and Evaluation of Heavy Metal Stability Under Acidic Conditions Open
Mining wastes or combustion ash are materials of high carbon sequestration potential but are also known for their toxicity in terms of heavy metal content. To utilize such waste materials for engineered carbon mineralization purposes, ther…