Evidence map›Paper›PMID 34928478›Full record

ArticleEJNMMI radiopharmacy and chemistry2021

A suitable time point for quantifying the radiochemical purity of

James M Kelly, Alejandro Amor-Coarasa, Elizabeth Sweeney, Justin J Wilson, Patrick W Causey, John W Babich

Open access · goldAbstract read
In one paragraph

Article in EJNMMI radiopharmacy and chemistry, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
2.8field-weighted citation impact, top 9% 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

16 citing papers in PubMed, 27 citations in OpenAlex.

  1. Article
  2. Review
  3. Quality control of actinium-225 andEJNMMI radiopharmacy and chemistry · 2026
    Article
  4. [EJNMMI radiopharmacy and chemistry · 2025
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  5. Towards DFO*Pharmaceutics · 2025
    Article
  6. Article
  7. Targeted Alpha Therapy: All We Need to Know aboutPharmaceuticals (Basel, Switzerland) · 2023
    Review
  8. Review
  9. Review
  10. Article
  11. Pharmaceutics · 2023
    Review
  12. Study ofMaterials (Basel, Switzerland) · 2022
    Article
  13. Gamma counting protocols for the accurate quantification ofEJNMMI radiopharmacy and chemistry · 2022
    Article
  14. Article
  15. Ac-EAZY! Towards GMP-Compliant Module Syntheses ofPharmaceuticals (Basel, Switzerland) · 2021
    Article
  16. A third generation PSMA-targeted agent [Nuclear medicine and biology
    Article
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

6 authors at 4 institutions in 2 countries.

James M KellyDepartment of Radiology, Molecular Imaging Innovations Institute (MI3), Weill Cornell Medicine, New York, NY, 10065, USA.
Alejandro Amor-CoarasaDepartment of Radiology, Albert Einstein College of Medicine, Bronx, NY, 10461, USA.
Elizabeth SweeneyDivision of Biostatistics, Department of Population Health Sciences, Weill Cornell Medicine, New York, NY, 10065, USA.
Justin J WilsonDepartment of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, 14853, USA.
Patrick W CauseyCanadian Nuclear Laboratories, Chalk River, ON, K0J 1J0, Canada.
John W BabichDepartment of Radiology, Molecular Imaging Innovations Institute (MI3), Weill Cornell Medicine, New York, NY, 10065, USA. jwbabich@gmail.com.ORCID http://orcid.org/0000-0002-1616-3416
Cornell University · USAlbert Einstein College of Medicine · USCanadian Nuclear Laboratories · CACitigroup · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAs

resultsSix ligands were conjugated to macrocyclic metal chelators and labeled with actinium-225 under conditions designed to generate diverse incorporation yields. RCP was determined by radio thin layer chromatography (radioTLC) followed by exposure of the TLC plate on a phosphor screen either 0.5, 2, 3.5, 5, 6.5, or 26 h after the plate was developed. The dataset was used to create models for predicting the true RCP for any pre-equilibrium measurement taken at an early time point. The 585 TLC measurements span RCP values of 1.8-99.5%. The statistical model created from these data predicted an independent data set with high accuracy. Predictions made at 0.5 h are more uncertain than predictions made at later time points. This is primarily due to the decay of bismuth-213. A measurement of RCP > 90% at 2 h predicts a true RCP > 97% and guarantees that RCP will exceed 90% after secular equilibrium is reached. These findings were independently validated using NaI(Tl) scintillation counting and high resolution gamma spectroscopy on a smaller set of samples with 10% ≤ RCP ≤ 100%.

conclusionsRCP of

Indexed as

Ac-225Quality controlRadiopharmacyTargeted alpha therapy

Identifiers

PMID34928478
PMCPMC8688611
OpenAlexW4200606482

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.