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Electronics and Power, 1978
X-ray computed tomography, derived from the Greek meaning 'to write a slice or section', has been commercially available from 1972, after its invention and development by G.N. Hounsfield at the central research laboratories of EMI in 1967. Since then, its impact on the medical world has been as great as the discovery of X-rays itself, and despite the ...
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X-ray computed tomography, derived from the Greek meaning 'to write a slice or section', has been commercially available from 1972, after its invention and development by G.N. Hounsfield at the central research laboratories of EMI in 1967. Since then, its impact on the medical world has been as great as the discovery of X-rays itself, and despite the ...
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Dose in x-ray computed tomography
Physics in Medicine and Biology, 2014Radiation dose in x-ray computed tomography (CT) has become a topic of high interest due to the increasing numbers of CT examinations performed worldwide. This review aims to present an overview of current concepts for both scanner output metrics and for patient dosimetry and will comment on their strengths and weaknesses.
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2017
This chapter provides an overview of the use of x-ray and computed tomography (CT)-based imaging for brachytherapy. Treatment planning in brachytherapy requires accurate imaging of both the implanted materials and the surrounding anatomy. Ultrasound (US) and magnetic resonance imaging (MRI), which can provide excellent soft-tissue contrast for ...
Martin T. King, Michael J. Zelefsky
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This chapter provides an overview of the use of x-ray and computed tomography (CT)-based imaging for brachytherapy. Treatment planning in brachytherapy requires accurate imaging of both the implanted materials and the surrounding anatomy. Ultrasound (US) and magnetic resonance imaging (MRI), which can provide excellent soft-tissue contrast for ...
Martin T. King, Michael J. Zelefsky
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2023
En esta ponencia se presenta una breve introducción a la técnica: Tomografía Computerizada de Rayos-X. Además, se presenta el tomógrafo ubicado en la Unidad de Difracción de Rayos-X y Tomografía Computerizada de los Servicios Centrales de Apoyo a la Investigación, SkyScan 2214 (Bruker S.L.), así como los experimentos que se están llevando a cabo ...
Salcedo, Inés R. +2 more
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En esta ponencia se presenta una breve introducción a la técnica: Tomografía Computerizada de Rayos-X. Además, se presenta el tomógrafo ubicado en la Unidad de Difracción de Rayos-X y Tomografía Computerizada de los Servicios Centrales de Apoyo a la Investigación, SkyScan 2214 (Bruker S.L.), así como los experimentos que se están llevando a cabo ...
Salcedo, Inés R. +2 more
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1980
Matter is made of elementary particles consisting of a nucleus composed of protons and neutrons surrounded by electrons. The protons are hydrogen nuclei with a positive charge and their number determines the atomic number. The neutrons, which have no electric charge, form with the protons the nucleons which determine the atomic mass.
G. Salamon, J. Saudinos
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Matter is made of elementary particles consisting of a nucleus composed of protons and neutrons surrounded by electrons. The protons are hydrogen nuclei with a positive charge and their number determines the atomic number. The neutrons, which have no electric charge, form with the protons the nucleons which determine the atomic mass.
G. Salamon, J. Saudinos
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The effects of scatter in x‐ray computed tomography
Medical Physics, 1982The effects of detection of scattered radiation in x‐ray transmission CT are studied both theoretically and experimentally. It is shown that scatter induces nonlinear errors in the measurement of attenuation values which can lead to cupping, streaks, and CT number inaccuracies.
P M, Joseph, R D, Spital
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1987
X-ray computed tomography (CT) is remarkably helpful in the diagnosis of diseases of the upper abdominal organs, particularly the liver, biliary tract, and pancreas. However, CT examination has not been established as reliable pathognomonic method due to the rapid development of technique and equipment.
Sadayuki Sakuma +2 more
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X-ray computed tomography (CT) is remarkably helpful in the diagnosis of diseases of the upper abdominal organs, particularly the liver, biliary tract, and pancreas. However, CT examination has not been established as reliable pathognomonic method due to the rapid development of technique and equipment.
Sadayuki Sakuma +2 more
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Radiation Load in X-Ray Computer Tomography
Biomedical Engineering, 2011Methods for radiation load reduction in helical multidetector X-ray computer tomographs are discussed. The GOST IEC standards and dose monitoring methods should be corrected.
A B, Blinov, N N, Blinov
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2022
Abstract This chapter focuses on the features of x-ray and computed tomography (CT). X-ray uses a form of radiation to conduct basic body imaging and destroy tumor beds to facilitate cancer therapy. However, ionization is one of the downsides of x-rays as it could result in a carcinogen.
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Abstract This chapter focuses on the features of x-ray and computed tomography (CT). X-ray uses a form of radiation to conduct basic body imaging and destroy tumor beds to facilitate cancer therapy. However, ionization is one of the downsides of x-rays as it could result in a carcinogen.
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X-ray computed tomography of the cardiovascular system
Current Problems in Cardiology, 1991X-ray CT of the heart is an evolving field. The ultrafast CT scanner provides a practical method of applying the high spatial resolution, high density resolution, and tomographic capabilities of conventional CT scanning, permitting an evaluation of the cardiovascular system.
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