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Your search keyword '"T. K. Lobzhanidze"' showing total 3 results
Start Over Author "T. K. Lobzhanidze" Topic 0202 electrical engineering, electronic engineering, information engineering
3 results on '"T. K. Lobzhanidze"'

1. Method for Determining the Point Spread Function for a Digital Radiography System

Author

A. K. Avakyan, T. K. Lobzhanidze, V. P. Smirnov, T. A. Krylova, S. A. Polikhov, D. Yu. Korovkin, I. L. Dergacheva, and A. A. Elanchik

Subjects
Physics, Point spread function, business.industry, 020209 energy, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, 02 engineering and technology, Image (mathematics), Optics, Nuclear Energy and Engineering, Beam (nautical), 0202 electrical engineering, electronic engineering, information engineering, Point (geometry), Deconvolution, business, Projection (set theory), Digital radiography
Abstract

The shape and size of the projection of the focal spot of an x-ray tube largely depend on the direction of the beam, which results in a spatial difference of the point spread function (PSF) of the imaging system. A model developed for determining the PSF at an arbitrary point of the radiation field is presented in this article. The input data for the model are the geometric parameters of the system, the measured magnified projection of the effective focal spot, and the PSF in the internal structure of the detector. The difference in the width of the profiles of the PSF between the experimental and modeled data does not exceed 7.2%. The projection images are reconstructed by means of a deconvolution algorithm using the modeled PSF. The frequency–contrast characteristics of the images show improvement compared with the initial image.

Published
2020

2. Development of a Radiotherapy System Based on 6 MeV Linac and Cone-Beam Computer Tomograph

Author

I. V. Gulidov, Nikolay Shvedunov, S. A. Ivanov, S. N. Kovalev, T. K. Lobzhanidze, A. D. Kaprin, T. A. Krylova, A. S. Evteev, I. L. Dergacheva, S. A. Polikhov, E. V. Khmelevskii, L. Yu. Ovchinnikova, D. V. Cherednichenko, G. B. Sharkov, V.I. Shvedunov, I. I. Rod’ko, S. A. Koloskov, V. P. Smirnov, G. A. Sarychev, T. V. Bondarenko, G. E. Gorlachev, Yu. S. Romanko, and P. V. Balakirev

Subjects
Physics, business.industry, 020209 energy, Physics::Medical Physics, Bremsstrahlung, Particle accelerator, Collimator, 02 engineering and technology, Linear particle accelerator, law.invention, Optics, Nuclear Energy and Engineering, Filter (video), law, 0202 electrical engineering, electronic engineering, information engineering, Physics::Accelerator Physics, Six degrees of freedom, Tomography, business, Beam (structure)
Abstract

A system currently under development for remote radiotherapy based on a 6 MeV linac and cone-beam computer tomograph is presented. Its distinguishing design features and solutions are described: compact 5-cm wavelength electron accelerator, solid-state modulator, visualization in the bremsstrahlung beam with low nominal energy 2.5 MeV, bremsstrahlung beam without a compensating filter, cone-beam computer tomography, multi-leaf collimator, adaptive radiotherapy, and a therapeutic table with six degrees of freedom. The system is compared with foreign analogs.

Published
2019

3. Correction to: Development of a Radiotherapy System Based on 6 MeV Linac and Cone-Beam Computer Tomograph

Author

Nikolay Shvedunov, S. A. Ivanov, S. A. Koloskov, S. A. Polikhov, I. A. Gulidov, L. Yu. Ovchinnikova, T. V. Bondarenko, D. V. Cherednichenko, P. V. Balakirev, Yu. S. Romanko, S. N. Kovalev, A. D. Kaprin, V.I. Shvedunov, V. P. Smirnov, T. A. Krylova, A. S. Evteev, E. V. Khmelevskii, G. E. Gorlachev, I. I. Rod’ko, G. B. Sharkov, G. A. Sarychev, I. L. Dergacheva, and T. K. Lobzhanidze

Subjects
Physics, business.industry, 020209 energy, medicine.medical_treatment, 02 engineering and technology, Linear particle accelerator, Radiation therapy, Optics, Nuclear Energy and Engineering, Cone (topology), 0202 electrical engineering, electronic engineering, information engineering, medicine, Development (differential geometry), Tomography, business, Beam (structure)
Abstract

The online version of the original article can be found at https://doi.org/10.1007/s10512-019-00490-9

Published
2019

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