Evidence map›Paper›PMID 27222796›Full record

ArticleNeuroImage. Clinical2016

Cerebral metabolism and perfusion in MR-negative individuals with refractory focal epilepsy assessed by simultaneous acquisition of (18)F-FDG PET and arterial spin labeling.

Ilaria Boscolo Galazzo, Maria Vittoria Mattoli, Francesca Benedetta Pizzini, Enrico De Vita, Anna Barnes, John S Duncan, Hans Rolf Jäger, Xavier Golay, Jamshed B Bomanji, Matthias Koepp and 2 more

Open access · goldAbstract read
In one paragraph

Article in NeuroImage. Clinical, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed, 3 pooled it
5.7field-weighted citation impact, top 4% of its field
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

50 citing papers in PubMed, 3 syntheses or guidelines pooled it, 91 citations in OpenAlex.

  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. Pooled it
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  5. Article
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  7. Head to head comparison between arterial spin labelling MRI and [Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
    Observational
  8. Review
  9. Article
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  11. Review
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  14. Review
  15. Long-term trends in total administered radiation dose from brain [European journal of nuclear medicine and molecular imaging · 2025
    Article
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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

12 authors at 4 institutions in 2 countries.

Ilaria Boscolo GalazzoInstitute of Nuclear Medicine, University College London, London, UK. Electronic address: i.galazzo@ucl.ac.uk.
Maria Vittoria MattoliInstitute of Nuclear Medicine, Catholic University of the Sacred Heart, Rome, Italy.
Francesca Benedetta PizziniNeuroradiology Unit, Department of Diagnostic and Pathology, University Hospital Verona, Verona, Italy.
Enrico De VitaLysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery, London, UK; Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, London, UK.
Anna BarnesInstitute of Nuclear Medicine, University College London, London, UK.
John S DuncanDepartment of Clinical and Experimental Epilepsy, UCL Institute of Neurology, London, UK.
Hans Rolf JägerDepartment of Radiology, University College London Hospitals, London, UK.
Xavier GolayLysholm Department of Neuroradiology, National Hospital for Neurology and Neurosurgery, London, UK; Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, London, UK.
Jamshed B BomanjiInstitute of Nuclear Medicine, University College London, London, UK.
Matthias KoeppDepartment of Clinical and Experimental Epilepsy, UCL Institute of Neurology, London, UK.
Ashley M GrovesInstitute of Nuclear Medicine, University College London, London, UK.
Francesco FraioliInstitute of Nuclear Medicine, University College London, London, UK.
University College London · GBNational Hospital for Neurology and Neurosurgery · GBUniversità Cattolica del Sacro Cuore · ITUniversity of Verona · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The major challenge in pre-surgical epileptic patient evaluation is the correct identification of the seizure onset area, especially in MR-negative patients. In this study, we aimed to: (1) assess the concordance between perfusion, from ASL, and metabolism, from (18)F-FDG, acquired simultaneously on PET/MR; (2) verify the utility of a statistical approach as supportive diagnostic tool for clinical readers. Secondarily, we compared (18)F-FDG PET data from the hybrid PET/MR system with those acquired with PET/CT, with the purpose of validate the reliability of (18)F-FDG PET/MR data. Twenty patients with refractory focal epilepsy, negative MR and a defined electro-clinical diagnosis underwent PET/MR, immediately followed by PET/CT. Standardized uptake value ratio (SUVr) and cerebral blood flow (CBF) maps were calculated for PET/CT-PET/MR and ASL, respectively. For all techniques, z-score of the asymmetry index (zAI) was applied for depicting significant Right/Left differences. SUVr and CBF images were firstly visually assessed by two neuroimaging readers, who then re-assessed them considering zAI for reaching a final diagnosis. High agreement between (18)F-FDG PET/MR and ASL was found, showing hypometabolism and hypoperfusion in the same hemisphere in 18/20 patients, while the remaining were normal. They were completely concordant in 14/18, concordant in at least one lobe in the remaining. zAI maps improved readers' confidence in 12/20 and 15/20 patients for (18)F-FDG PET/MR and ASL, respectively. (18)F-FDG PET/CT-PET/MR showed high agreement, especially when zAI was considered. The simultaneous metabolism-perfusion acquisition provides excellent concordance on focus lateralisation and good concordance on localisation, determining useful complementary information.

Indexed as

Brain MappingPositron-Emission TomographyAdultCerebrovascular CirculationDrug Resistant EpilepsyEpilepsies, PartialFemaleFluorodeoxyglucose F18HumansImaging, Three-DimensionalMaleMiddle AgedRetrospective StudiesSeverity of Illness IndexSpin LabelsFluorodeoxyglucose F18Spin LabelsArterial spin labelingCerebral blood flowEpilepsyGlucosePositron emission tomographySimultaneous PET/MR

Identifiers

PMID27222796
PMCPMC4872676
OpenAlexW2329019179

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

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.