Evidence map›Paper›PMID 35925521›Full record

ArticleEJNMMI physics2022

Quantitative SPECT/CT imaging of lead-212: a phantom study.

Monika Kvassheim, Mona-Elisabeth R Revheim, Caroline Stokke

Erratum issuedAbstract read
In one paragraph

Article in EJNMMI physics, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
–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

23 citing papers in PubMed.

  1. Predicting tumour and organ dose in α-radiopharmaceutical therapy: aEuropean journal of nuclear medicine and molecular imaging · 2026
    Article
  2. Review
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  4. Review
  5. Quantitative Comparison of SPECT and PET Performance for Clinical Theranostic Applications.Journal of nuclear medicine : official publication, Society of Nuclear Medicine · 2026
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  6. Article
  7. Review
  8. Therapeutic evaluation of [European journal of nuclear medicine and molecular imaging · 2025
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  9. Review
  10. EJNMMI radiopharmacy and chemistry · 2025
    Review
  11. DifferentToxics · 2025
    Article
  12. Article
  13. First-in-Human Phase 0 Study of AB001, a Prostate-Specific Membrane Antigen-TargetedJournal of nuclear medicine : official publication, Society of Nuclear Medicine · 2025
    Article
  14. Article
  15. Effectiveness of [European journal of nuclear medicine and molecular imaging · 2024
    Article
  16. Review
  17. Article
  18. EANM guidance document: dosimetry for first-in-human studies and early phase clinical trials.European journal of nuclear medicine and molecular imaging · 2024
    Article
  19. First-in-HumanJournal of nuclear medicine : official publication, Society of Nuclear Medicine · 2024
    Article
  20. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors.

Monika KvassheimDepartment of Physics and Computational Radiology, Division of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway. mokvas@ous-hf.no.ORCID http://orcid.org/0000-0001-7985-1980
Mona-Elisabeth R RevheimFaculty of Medicine, University of Oslo, Oslo, Norway.
Caroline StokkeDepartment of Physics and Computational Radiology, Division of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway.

Funding

Helse Sør-Øst RHF 2020028
6 · The paper itself

Abstract

backgroundLead-212 (

resultsBoth acquisition parameters (combining two different energy windows and two different collimators) and iterative reconstruction parameters (varying the iterations x subsets between 10 × 1, 15 × 1, 30 × 1, 30 × 2, 30 × 3, 30 × 4, and 30 × 30) were investigated to evaluate visual quality and quantitative uncertainties based on phantom images. Calibration factors were determined using a homogeneous phantom and were stable when the total activity imaged exceeded 1 MBq for all the imaging protocols studied, but they increased sharply as the activity decayed below 1 MBq. Both a 20% window centred on 239 keV and a 40% window on 79 keV, with dual scatter windows of 5% and 20%, respectively, could be used. Visual quality at the lowest activity concentrations was improved with the High Energy collimator and the 79 keV energy window. Fractional uncertainty in the activity quantitation, including uncertainties from calibration factors and small volume effects, in spheres of 2.6 ml in the NEMA phantom was 16-21% for all protocols with the 30 × 4 filtered reconstruction except the High Energy collimator with the 239 keV energy window. Quantitative analysis was possible both with and without filters, but the visual quality of the images improved with a filter.

conclusionsOnly minor differences were observed between the imaging protocols which were all determined suitable for quantitative imaging of

Indexed as

Alpha particleImagingLead-212PhantomQuantitativeSPECTTherapy

Identifiers

PMID35925521
PMCPMC9352840

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Registered trials

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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.