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OtherImaging (JNMT)

PET/CT image artifacts caused by the arms

Ismet Sarikaya and Ali Sarikaya
Journal of Nuclear Medicine Technology July 2020, jnmt.120.248641; DOI: https://doi.org/10.2967/jnmt.120.248641
Ismet Sarikaya
1 Kuwait University, Faculty of Medicine, Mubarak Al-Kabeer Hospital, Kuwait;
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Ali Sarikaya
2 Trakya Univ. Faculty of Medicine, Turkey
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Abstract

Positron Emission Tomography/Computed Tomography (PET/CT) images are usually obtained in arms-up position in cases with no head and neck pathology and in arms-down position to image head and neck area. Arms usually cause artifacts regardless of up or down positioning. Arms can cause various artifacts such as beam hardening and scatter, truncation and cold areas (cold artifacts) in obese or large sized patients, motion artifacts, implanted metal object artifacts, and artifacts related to radiotracer extravasation at the injection site. In this review article we will review the mechanisms of these artifacts and suggest solutions to reduce or eliminate them such as such as reviewing non-attenuation corrected PET image, performing extended field of view reconstruction, not applying scatter correction, using software to correct beam hardening, scatter and truncation artifacts. We will present various PET/CT images before and after corrections as related to such artifacts.

  • Image Processing
  • Image Reconstruction
  • PET
  • PET/CT
  • PET/CT
  • arms
  • artifacts
  • cold artifacts
  • truncation

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Journal of Nuclear Medicine Technology: 49 (1)
Journal of Nuclear Medicine Technology
Vol. 49, Issue 1
March 1, 2021
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PET/CT image artifacts caused by the arms
Ismet Sarikaya, Ali Sarikaya
Journal of Nuclear Medicine Technology Jul 2020, jnmt.120.248641; DOI: 10.2967/jnmt.120.248641

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PET/CT image artifacts caused by the arms
Ismet Sarikaya, Ali Sarikaya
Journal of Nuclear Medicine Technology Jul 2020, jnmt.120.248641; DOI: 10.2967/jnmt.120.248641
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  • 18F-Sodium Fluoride (NaF) PET/CT in obese patients on LYSO PET/CT system: Patient dosimetry, optimization of injected activity and acquisition time
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Keywords

  • Image Processing
  • image reconstruction
  • PET
  • PET/CT
  • arms
  • artifacts
  • cold artifacts
  • truncation
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