PET/MRI: Where might it replace PET/CT?

Eric Ehman, Geoffrey B Johnson, Javier E. Villanueva-Meyer, Soonmee Cha, Andrew Palmera Leynes, Peder Eric Zufall Larson, Thomas A. Hope

Research output: Contribution to journalArticle

40 Scopus citations


Simultaneous positron emission tomography and MRI (PET/MRI) is a technology that combines the anatomic and quantitative strengths of MR imaging with physiologic information obtained from PET. PET and computed tomography (PET/CT) performed in a single scanning session is an established technology already in widespread and accepted use worldwide. Given the higher cost and complexity of operating and interpreting the studies obtained on a PET/MRI system, there has been question as to which patients would benefit most from imaging with PET/MRI versus PET/CT. In this article, we compare PET/MRI with PET/CT, detail the applications for which PET/MRI has shown promise and discuss impediments to future adoption. It is our hope that future work will prove the benefit of PET/MRI to specific groups of patients, initially those in which PET/CT and MRI are already performed, leveraging simultaneity and allowing for greater degrees of multiparametric evaluation.

Original languageEnglish (US)
JournalJournal of Magnetic Resonance Imaging
StateAccepted/In press - 2017



  • CT
  • MRI
  • PET
  • PET/CT

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Ehman, E., Johnson, G. B., Villanueva-Meyer, J. E., Cha, S., Leynes, A. P., Larson, P. E. Z., & Hope, T. A. (Accepted/In press). PET/MRI: Where might it replace PET/CT? Journal of Magnetic Resonance Imaging.