Evidence map›Paper›PMID 35666076›Full record

SynthesisEpilepsia open2022

Optimal timing of interictal FDG-PET for epilepsy surgery: A systematic review on time since last seizure.

Nienke N de Laat, Nelleke Tolboom, Frans S S Leijten

Abstract readSystematic Review
In one paragraph

Synthesis in Epilepsia open, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. EANM practice guidelines for an appropriate use of PET and SPECT for patients with epilepsy.European journal of nuclear medicine and molecular imaging · 2024
    Guideline
  2. Pooled it
  3. Detection of Focal Lesions in Epilepsy with [Journal of nuclear medicine : official publication, Society of Nuclear Medicine · 2026
    Article
  4. Article
  5. Review
  6. Seminars in epileptology: Presurgical epilepsy evaluation.Epileptic disorders : international epilepsy journal with videotape · 2025
    Review
  7. Article
  8. DelayedFrontiers in medicine · 2023
    Article
  9. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Nienke N de LaatUtrecht University, Utrecht, The Netherlands.ORCID 0000-0002-4010-6323
Nelleke TolboomDepartment of Radiology and Nuclear Medicine, University Medical Center Utrecht, Utrecht, The Netherlands.
Frans S S LeijtenDepartment of Neurology and Neurosurgery, University Medical Center Utrecht, Utrecht, The Netherlands.ORCID 0000-0003-2603-3364

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Interictal 18F-Fluorodeoxyglucose positron emission tomography (FDG-PET) is used in the workup for epilepsy surgery when MRI and EEG video monitoring are not conclusive. Timing of FDG-PET is crucial to avoid the metabolically dynamic (post)ictal state that complicates interpretation, but the exact time window is unclear. We performed a systematic review to provide an evidence-based recommendation for the minimal time interval between last seizure and FDG-PET acquisition. We searched PubMed and Embase for articles on the effect of time since last seizure on FDG-PET outcome. Quality assessment was conducted with the Critical Appraisal Skills Programme Cohort Study Checklist. We identified five studies. Three studies were classified as of low to moderate quality, mainly due to undocumented data or insufficient statistical measurements. Two high-quality studies included only adults with Temporal Lobe Epilepsy (TLE). The metabolic interictal phase is 24 or 48 hours after the last seizure, depending on seizure type. The recommendation is based on the best available evidence from two small study populations for TLE. If clinically possible, interictal FDG-PET in adults should be performed at least 24 hours after focal aware seizures and 48 hours after focal impaired awareness and focal to bilateral tonic-clonic seizures.

Indexed as

EpilepsyEpilepsy, Temporal LobeAdultCohort StudiesFluorodeoxyglucose F18HumansPositron-Emission TomographySeizuresFluorodeoxyglucose F18F-fluorodeoxyglucose (18F-FDG)glucose metabolismpositron emission tomography (PET)postictaltemporal lobe epilepsy (TLE)

Identifiers

PMID35666076
PMCPMC9436292

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.