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Research ArticleBrief Communication

Making the Case for Brain 18F-FDG PET Subtraction in Medically Refractory Epilepsy: A Novel, Useful Tool—Practical Points?

Mehdi Djekidel
Journal of Nuclear Medicine Technology December 2022, 50 (4) 353-356; DOI: https://doi.org/10.2967/jnmt.122.264218
Mehdi Djekidel
QMC, Farmington, Michigan
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Abstract

18F-FDG PET plays a major role in the presurgical evaluation of medically refractory epilepsy patients. The current standard of care is performing interictal evaluations of glucose metabolism. Use of this method is related mostly to the tracer kinetics of 18F-FDG because of a long uptake phase that would translate into ictal injections that have low sensitivity and low specificity and demonstrate not only ictal but postictal changes. This limitation can be overcome in some status epilepticus scenarios in which prolonged seizures can then correlate better with 18F-FDG uptake kinetics. In these cases, focal visual qualitative hot spots are suggestive of the seizure-onset zone. However, by using advanced subtraction techniques, the prolonged 18F-FDG uptake phase can be overcome in a variety of other cases as well, opening the door to a slightly larger set of patients who may benefit from this higher-resolution PET method. This article presents 4 cases in which a novel subtraction 18F-FDG PET technique was used and elucidates its impact in these specific cases.

  • brain PET
  • FDG
  • epilepsy
  • subtraction PET

Footnotes

  • Published online Aug. 30, 2022.

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Journal of Nuclear Medicine Technology: 50 (4)
Journal of Nuclear Medicine Technology
Vol. 50, Issue 4
December 1, 2022
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Making the Case for Brain 18F-FDG PET Subtraction in Medically Refractory Epilepsy: A Novel, Useful Tool—Practical Points?
Mehdi Djekidel
Journal of Nuclear Medicine Technology Dec 2022, 50 (4) 353-356; DOI: 10.2967/jnmt.122.264218

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Making the Case for Brain 18F-FDG PET Subtraction in Medically Refractory Epilepsy: A Novel, Useful Tool—Practical Points?
Mehdi Djekidel
Journal of Nuclear Medicine Technology Dec 2022, 50 (4) 353-356; DOI: 10.2967/jnmt.122.264218
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Keywords

  • Brain PET
  • FDG
  • epilepsy
  • subtraction PET
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