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Related Experiment Videos

Chemical shift artifact along the section-select axis.

R H Wachsberg1, D G Mitchell, M D Rifkin

  • 1Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA 19107.

Journal of Magnetic Resonance Imaging : JMRI
|September 1, 1992
PubMed
Summary
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Chemical shift artifact (CSA) occurs along the section-select axis in abdominal MRI, not just the frequency-encoding axis. This common artifact can mimic a renal mass, potentially leading to misdiagnosis.

Area of Science:

  • Radiology
  • Medical Imaging
  • Magnetic Resonance Imaging

Background:

  • Chemical shift artifact (CSA) is a known phenomenon in magnetic resonance (MR) imaging.
  • Traditionally, CSA is recognized along the frequency-encoding axis.
  • The occurrence and appearance of CSA along the section-select axis are less understood.

Purpose of the Study:

  • To investigate the occurrence of chemical shift artifact (CSA) along the section-select axis in abdominal MR imaging.
  • To determine if CSA along the section-select axis can mimic pathology, specifically renal masses.
  • To assess the prevalence of CSA adjacent to the renal poles.

Main Methods:

  • Retrospective analysis of 50 abdominal MR imaging studies.
  • Evaluation for the presence of CSA along the section-select axis.

Related Experiment Videos

  • Assessment of CSA proximity to the upper and lower renal poles.

    • Main Results:

    • Chemical shift artifact (CSA) along the section-select axis was observed in 76% of the abdominal MR studies.
    • CSA was found adjacent to 39% of all imaged renal poles.
    • A case was identified where CSA mimicked a renal mass.

    Conclusions:

    • Chemical shift artifact (CSA) along the section-select axis is a common finding in abdominal MR imaging.
    • This artifact can present in a manner that resembles a renal mass.
    • Radiologists should be aware of CSA along the section-select axis to avoid misinterpreting it as pathology.