Tomographical Map
Tomographical Map - Related Videos
08:41
Lensfree On-chip Tomographic Microscopy Employing Multi-angle Illumination and Pixel Super-resolution
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Cited by 11 •
2012
Lensfree optical tomography is a three-dimensional microscopy technique that offers a spatial resolution of <1 μm × <1 μm × <3 μm in x, y and z dimensions, respectively, over a large imaging-volume of 15-100 mm3, which can be particularly useful for integration with lab-on-a-chip platforms.
07:57
Scaled Anatomical Model Creation of Biomedical Tomographic Imaging Data and Associated Labels for Subsequent Sub-surface Laser Engraving (SSLE) of Glass Crystals
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2017
A methodology is described herein for representing anatomical imaging data within crystals. We create scaled three-dimensional models of biomedical imaging data for use in Sub-Surface Laser Engraving (SSLE) of crystal glass. This tool offers a useful complement to computational display or three-dimensionally printed models used within clinical or educational settings.
06:58
Fate Mapping
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2023
Fate mapping is a technique used to understand how embryonic cells divide, differentiate, and migrate during development. In classic fate mapping experiments, cells in different areas of an embryo are labeled with a chemical dye and then tracked to determine which tissues or structures they form. Technological improvements now allow for individual cells to be marked and traced throughout embryonic development and adulthood. This video reviews the concepts behind fate mapping, and then details a...
11:03
Motor Maps
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2023
Source: Laboratories of Jonas T. Kaplan and Sarah I. Gimbel—University of Southern California One principle of brain organization is the topographic mapping of information. Especially in sensory and motor cortices, adjacent regions of the brain tend to represent information from adjacent parts of the body, resulting in maps of the body expressed on the surface of the brain. The primary sensory and motor maps in the brain surround a prominent sulcus known as the central sulcus. The cortex...
10:00
Energy Dispersive X-ray Tomography for 3D Elemental Mapping of Individual Nanoparticles
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Cited by 11 •
2016
The use of energy dispersive X-ray tomography in the scanning transmission electron microscope to characterize elemental distributions within single nanoparticles in three dimensions is described.
FAQs
Reconstruction treats the measured projections or sensor readings as indirect evidence of internal features. Computational algorithms then estimate how properties such as density, attenuation, conductivity, or acoustic response vary through the object. Because multiple internal configurations can produce similar measurements, the reconstruction depends on assumptions that influence the resulting spatial model and its interpretation.
Measurement quality, reconstruction assumptions, and spatial resolution strongly control the reliability of a tomographical map. Poor or limited sensor readings can obscure internal variations, while assumptions built into the computational reconstruction can affect estimated properties. Resolution determines how finely features appear, influencing whether defects or material changes are represented clearly or only as broader variations.
Two-dimensional slices represent reconstructed properties within selected cross-sectional views, whereas three-dimensional models assemble spatial information throughout a volume. The choice affects how engineers examine internal structure and communicate findings. Slices can focus attention on particular locations, while a volume model supports inspection of the distribution and continuity of features across the object.
A typical workflow begins by collecting measurements around or across the object, such as multiple projections or sensor readings. Computational algorithms process these data and solve the associated inverse problem to estimate internal property variations. The results are then represented as two-dimensional slices or a three-dimensional model for inspection, characterization, or monitoring.
Engineers apply them when internal examination is needed without necessarily cutting into the object. The reconstructed information can support inspection of materials and infrastructure by revealing hidden voids, cracks, inclusions, or other spatial variations. This makes the approach useful for assessing internal condition while preserving the inspected component for continued analysis or service.
Depending on the measurements and reconstruction, the maps can estimate spatial changes in density, attenuation, conductivity, or acoustic response. They can therefore support materials characterization, infrastructure inspection, and process monitoring, not just defect detection. Interpreting the resulting slices or models requires attention to measurement quality, assumptions, and the available spatial resolution.