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Principles behind Computed Tomography (CT)

Gunnarsson, Mikael LU and Ydström, Kristina LU (2022) In Series in Medical Physics and Biomedical Engineering 1.
Abstract
The use of Computed tomography (CT) for anatomical information in a combination with the SPECT system has in many ways added substantial information to many nuclear medicine imaging procedures. The information from the CT system can provide information on the location of lesions and can be used for attenuation correction. Modern SPECT/CT and PET/CT today have CT scanners that provide diagnostic quality. This chapter provides the principles behind the X-ray imaging and in particular CT. It describes scanner configurations and components for a typical CT system and how data are acquired. Also, a short description of dual-energy systems that provide additional information is included. Iterative reconstruction of image, and the definition of... (More)
The use of Computed tomography (CT) for anatomical information in a combination with the SPECT system has in many ways added substantial information to many nuclear medicine imaging procedures. The information from the CT system can provide information on the location of lesions and can be used for attenuation correction. Modern SPECT/CT and PET/CT today have CT scanners that provide diagnostic quality. This chapter provides the principles behind the X-ray imaging and in particular CT. It describes scanner configurations and components for a typical CT system and how data are acquired. Also, a short description of dual-energy systems that provide additional information is included. Iterative reconstruction of image, and the definition of the Hounsfield unit is discussed together with how different factors affect the image quality. A part of the chapter also discusses CT dosimetry and how the absorbed doses can be measured, quantified, and possibly be reduced. A section also discusses different types of artefacts in the images caused by, for example, metals, respiratory movements, and beam hardening. (Less)
Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Handbook of Nuclear Medicine and Molecular Imaging for Physicists : Instrumentation and Imaging Procedures - Instrumentation and Imaging Procedures
series title
Series in Medical Physics and Biomedical Engineering
editor
Ljungberg, Michael
volume
1
edition
1
pages
15 pages
publisher
CRC Press
ISBN
9781138593268
9780429489556
language
English
LU publication?
yes
id
27fb70ee-3d3c-4dfe-b496-505aab06b4b6
alternative location
https://www.taylorfrancis.com/chapters/edit/10.1201/9780429489556-31/principles-behind-computed-tomography-ct-mikael-gunnarsson-kristina-ydstr%C3%B6m?context=ubx&refId=de05277a-97a1-4299-a648-a799f991bc18
date added to LUP
2023-05-26 11:23:32
date last changed
2023-05-26 11:23:32
@inbook{27fb70ee-3d3c-4dfe-b496-505aab06b4b6,
  abstract     = {{The use of Computed tomography (CT) for anatomical information in a combination with the SPECT system has in many ways added substantial information to many nuclear medicine imaging procedures. The information from the CT system can provide information on the location of lesions and can be used for attenuation correction. Modern SPECT/CT and PET/CT today have CT scanners that provide diagnostic quality. This chapter provides the principles behind the X-ray imaging and in particular CT. It describes scanner configurations and components for a typical CT system and how data are acquired. Also, a short description of dual-energy systems that provide additional information is included. Iterative reconstruction of image, and the definition of the Hounsfield unit is discussed together with how different factors affect the image quality. A part of the chapter also discusses CT dosimetry and how the absorbed doses can be measured, quantified, and possibly be reduced. A section also discusses different types of artefacts in the images caused by, for example, metals, respiratory movements, and beam hardening.}},
  author       = {{Gunnarsson, Mikael and Ydström, Kristina}},
  booktitle    = {{Handbook of Nuclear Medicine and Molecular Imaging for Physicists : Instrumentation and Imaging Procedures}},
  editor       = {{Ljungberg, Michael}},
  isbn         = {{9781138593268}},
  language     = {{eng}},
  month        = {{04}},
  publisher    = {{CRC Press}},
  series       = {{Series in Medical Physics and Biomedical Engineering}},
  title        = {{Principles behind Computed Tomography (CT)}},
  url          = {{https://www.taylorfrancis.com/chapters/edit/10.1201/9780429489556-31/principles-behind-computed-tomography-ct-mikael-gunnarsson-kristina-ydstr%C3%B6m?context=ubx&refId=de05277a-97a1-4299-a648-a799f991bc18}},
  volume       = {{1}},
  year         = {{2022}},
}