&lt;title&gt;Scattered x-rays in medical diagnostics&lt;/title&gt;

Kumakhov, M. A.; Gamaliy, A. F.; Vasiliev, V. N.; Zaytsev, M. Yu.; Zaytseva, K. V.; Markelov, A. A.; Ozerov, Yu. V.

doi:10.1117/12.637984

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…Electron sources are the core components of various vacuum electron devices, and as such, they are widely used in displays, 1 electron microscopy, 2 traveling-wave tubes, 3 medical diagnosis, 4 free-electron lasers, 5,6 X-ray sources, 7 and other fields. Conventional electron sources predominantly consist of thermionic cathodes with metal filaments, which have continually dominated this field for nearly a century despite their numerous drawbacks, including a relatively poor electron beam quality, a slow response, and high energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Enhanced field emission stability of vertically aligned carbon nanotubes through anchoring for X-ray imaging applications

Liu

Xiao

et al. 2023

J. Mater. Chem. C

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Section: Introductionmentioning

confidence: 99%

Enhanced field emission stability of vertically aligned carbon nanotubes through anchoring for X-ray imaging applications

Liu

Xiao

et al. 2023

J. Mater. Chem. C

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“…The electron density in the volume of measurement was estimated as the responses ratio in actual and calibration conditions without MS contributions. Using the calibration data, the electron density at the point r can be calculated as e(r)= N(r)-NMS(r) (1) N (t(r))-N (t(r))'…”

Section: Data Correctionmentioning

confidence: 99%

<title>An algorithm and program for data processing from a Compton scattering imaging device</title>

Vasiliev

Zaytseva²

2005

SPIE Proceedings

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The VolumeScope, a prototype 3D X-ray scanner based on Compton backscatter detection, was designed for examination of a human body electron density distribution. An algorithm and computer program for 3D image reconstruction from the VolumeScope measured data are presented. The reconstruction includes corrections for photon attenuation and multiple scatter in surrounding tissues and postprocessing digital filtering. Properties of multiple scattered photons inside the object of examination were studied by Monte Carlo technique and a geometrical efficiency of the multiple scatter detection was calculated on the base of the collimator design. The contribution of multiple scattered photons in semi-infinite water medium was from 1 5 to 23% of maximum detector response. The VolumeScope program is described to perform data processing and display the electron density distribution of the object as 2D grayscale images and 3D surfaces of internal structures.

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<title>Frequency characteristics of images measured on the VolumeScope scanning device</title>

Vasiliev

Zaytsev²

2005

SPIE Proceedings

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The modulation transfer function was determined on the VolumeScope, a prototype X-ray Compton scatter tomographic scanner. The linear spread function of the device was measured independently along each coordinate axis with a 0.3 mm aluminum foil slightly angled with respect to the voxel grid. A technique of the presampled MTF generation was used to increase a sampling frequency of the data and reduce a statistical noise. The LSFs and MTFs along three coordinate axes are presented. The FWHMs of the LSF peaks are 2.50, 2.3 1 and 3.72 mm along the axes X, Y and Z respectively. The MTF cutoff frequencies are 0.45,0.50 and 0.35 cycle/mmrespectively.

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<title>Scattered x-rays in medical diagnostics</title>

Cited by 4 publications

References 5 publications

Enhanced field emission stability of vertically aligned carbon nanotubes through anchoring for X-ray imaging applications

Enhanced field emission stability of vertically aligned carbon nanotubes through anchoring for X-ray imaging applications

<title>An algorithm and program for data processing from a Compton scattering imaging device</title>

<title>Frequency characteristics of images measured on the VolumeScope scanning device</title>

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