Evidence map›Paper›PMID 24942608›Full record

ArticleJournal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology2014

Multicenter cross-calibration of I-123 metaiodobenzylguanidine heart-to-mediastinum ratios to overcome camera-collimator variations.

Kenichi Nakajima, Koichi Okuda, Mana Yoshimura, Shinro Matsuo, Hiroshi Wakabayashi, Yasuhiro Imanishi, Seigo Kinuya

Abstract readMulticenter Study
In one paragraph

Article in Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers.

0numbers the graph read from it
0cells of the map it votes in
81citing 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

81 citing papers in PubMed.

  1. Relationship of left ventricular global longitudinal strain with cardiac autonomic denervation as assessed byJournal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology · 2019
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  8. Heterogeneity of dementia with lewy bodies: Insights from clinical presentations, neuropathology, and biomarkers.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
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  11. Enhanced visual illusions in Parkinson's disease with cardiovascular autonomic failure.Clinical autonomic research : official journal of the Clinical Autonomic Research Society · 2025
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  17. SympatheticAnnals of nuclear medicine · 2024
    Article
  18. Article
  19. Article
  20. Article

21 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors.

Kenichi NakajimaDepartment of Nuclear Medicine, Kanazawa University Hospital, 13-1 Takara-machi, Kanazawa, 920-8641, Japan, nakajima@med.kanazawa-u.ac.jp.
Koichi Okuda
Mana Yoshimura
Shinro Matsuo
Hiroshi Wakabayashi
Yasuhiro Imanishi
Seigo Kinuya

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe heart-to-mediastinum ratio (HMR) of (123)I-metaiodobenzylguanidine (MIBG) showed variations among institutions and needs to be standardized among various scinticamera-collimator combinations.

methodsA total of 225 phantom experiments were performed in 84 institutions to calculate cross-calibration coefficients of HMR. Based on phantom studies, a conversion coefficient for each camera-collimator system was created, including low-energy (LE, n = 125) and a medium-energy (ME, n = 100) collimators. An average conversion coefficient from the most common ME group was used to calculate the standard HMR. In clinical MIBG studies (n = 52) from three institutions, HMRs were standardized from both LE- and ME-type collimators and classified into risk groups of <1.60, 1.60-2.19, and ≥2.20.

resultsThe average conversion coefficients from the individual camera-collimator condition to the mathematically calculated reference HMR ranged from 0.55 to 0.75 for LE groups and from 0.83 to 0.95 for ME groups. The conversion coefficient of 0.88 was used to unify HMRs from all acquisition conditions. Using the standardized HMR, clinical studies (n = 52) showed good agreement between LE and ME types regarding three risk groups (κ = 0.83, P < .0001, complete agreement in 90%, 42% of the patients reclassified into the same risk group).

conclusionBy using the reference HMR and conversion coefficients for the system, HMRs with various conditions can be converted to the standard HMRs in a range of normal to low HMRs.

Indexed as

Artifacts3-IodobenzylguanidineCalibrationEquipment DesignEquipment Failure AnalysisGamma CamerasHeartHumansJapanMediastinumMyocardiumPhantoms, ImagingQuality Assurance, Health CareRadionuclide ImagingRadiopharmaceuticalsReproducibility of Results3-IodobenzylguanidineRadiopharmaceuticals

Identifiers

PMID24942608
PMCPMC4167440

What Socratic holds

Textmetadata
LicenceCC BY
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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 Socratic graph.