Scanning Beam Digital X-ray
Scanning Beam Digital X-ray - Related Videos
10:39
Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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The measurement protocol and data analysis procedure are given for obtaining transverse coherence of a synchrotron radiation X-ray source along four directions simultaneously using a single 2-D checkerboard phase grating. This simple technique can be applied for complete transverse coherence characterization of X-ray sources and X-ray optics.
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Preparing Adherent Cells for X-ray Fluorescence Imaging by Chemical Fixation
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08:57
Focussed Ion Beam Milling and Scanning Electron Microscopy of Brain Tissue
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Cited by 105 •
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This protocol describes how resin embedded brain tissue can be prepared and imaged in the three dimensions in the focussed ion beam, scanning electron microscope.
10:25
Single-Digit Nanometer Electron-Beam Lithography with an Aberration-Corrected Scanning Transmission Electron Microscope
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Cited by 4 •
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We use an aberration-corrected scanning transmission electron microscope to define single-digit nanometer patterns in two widely-used electron-beam resists: poly (methyl methacrylate) and hydrogen silsesquioxane. Resist patterns can be replicated in target materials of choice with single-digit nanometer fidelity using liftoff, plasma etching, and resist infiltration by organometallics.
09:31
X-ray Diffraction
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2023
Source: Faisal Alamgir, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA X-ray diffraction (XRD) is a technique used in materials science for determining the atomic and molecular structure of a material. This is done by irradiating a sample of the material with incident X-rays and then measuring the intensities and scattering angles of the X-rays that are scattered by the material. The intensity of the scattered X-rays are plotted as a function of the...
FAQs
During a scan, the narrow beam advances across the anatomy in successive lines, and the detector records transmitted-radiation measurements for each position. Combining these measurements preserves spatial information across the scanned field while limiting the volume exposed at any one moment. This line-by-line acquisition is the central mechanism that turns sequential readings into a two-dimensional radiograph.
Beam restriction matters because scattered radiation can reduce radiographic contrast. In Scanning Beam Digital X-ray, only a small region is irradiated at a given moment, which can limit the amount of scatter reaching the detector. The resulting measurements may distinguish anatomical features more clearly, making the approach relevant when image contrast is important for evaluating bones or soft-tissue structures.
The scan path and detector recording must remain coordinated. Each beam position needs to correspond to the appropriate transmitted-radiation measurement before the readings are assembled into an image. If that relationship is not maintained, spatial information could be assigned incorrectly. The method therefore depends on coordinated beam movement, measurement collection, and accurate image assembly.
A practical acquisition sequence uses a narrow X-ray beam, a mechanism that moves the beam across the body, and a digital detector positioned to record transmitted radiation. Measurements are collected line by line and then combined into the radiograph. The workflow therefore requires consistent scanning across the intended anatomical region and an electronic system capable of assembling the recorded data.
Once assembled, the radiograph can undergo digital evaluation of bones, soft-tissue structures, and other anatomical features. The same image-based workflow supports more than acquisition: images can be processed, stored, and shared electronically. These capabilities make the recorded examination useful for subsequent evaluation and for distributing imaging information within digital medical settings.
In medicine, the technique is relevant to diagnostic radiography when digital images of anatomical structures are needed and scatter control may support image contrast. Its research value extends to investigating imaging systems designed around lower scatter and dose-conscious operation. These uses connect the scanning strategy with routine anatomical evaluation and the development of more controlled radiographic approaches.