Evidence map›Paper›PMID 33898085›Full record

ArticleJournal of radiosurgery and SBRT2021

The impact of unscheduled gaps and iso-centre sequencing on the biologically effective dose in Gamma Knife radiosurgery.

Thomas Klinge, Marc Modat, Jamie R McClelland, Alexis Dimitriadis, Ian Paddick, John W Hopewell, Lee Walton, Jeremy Rowe, Neil Kitchen, Sébastien Ourselin

Abstract read
In one paragraph

Article in Journal of radiosurgery and SBRT, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing 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

5 citing papers in PubMed.

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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

10 authors.

Thomas KlingeWellcome/EPSRC Centre for Interventional and Surgical Sciences (WEISS), Dept. Medical Physics and Biomedical Engineering, University College London, London, UK.
Marc ModatSchool of Biomedical Engineering & Imaging Sciences, King's College London, London, UK.
Jamie R McClellandCentre for Medical Image Computing, Dept. Medical Physics and Biomedical Engineering, University College London, London, UK.
Alexis DimitriadisQueen Square Gamma Knife Centre, National Hospital for Neurology and Neurosurgery, London, UK.
Ian PaddickQueen Square Gamma Knife Centre, National Hospital for Neurology and Neurosurgery, London, UK.
John W HopewellGreen Templeton College, University of Oxford, Oxford, UK.
Lee WaltonThe National Centre for Stereotactic Radiosurgery, Royal Hallamshire Hospital, Sheffield, UK.
Jeremy RoweThe National Centre for Stereotactic Radiosurgery, Royal Hallamshire Hospital, Sheffield, UK.
Neil KitchenVictor Horsley Department of Neurosurgery, National Hospital Queen Square, UCLH Trust, London, UK.
Sébastien OurselinSchool of Biomedical Engineering & Imaging Sciences, King's College London, London, UK.

Funding

Wellcome Trust
6 · The paper itself

Abstract

purposeEstablish the impact of iso-centre sequencing and unscheduled gaps in Gamma Knife® (GK) radiosurgery on the biologically effective dose (BED).

methodsA BED model was used to study BED values on the prescription iso-surface of patients treated with GK Perfexion™ (Vestibular Schwannoma). The effect of a 15 min gap, simulated at varying points in the treatment delivery, and adjustments to the sequencing of iso-centre delivery, based on average dose-rate, was quantified in terms of the impact on BED.

resultsDepending on the position of the gap and the average dose-rate profiles, the mean BED values were decreased by 0.1% to 9.9% of the value in the original plan. A heuristic approach to iso-centre sequencing showed variations in BED of up to 14.2%, relative to the mean BED of the original sequence.

conclusionThe treatment variables, like the iso-centre sequence and unscheduled gaps, should be considered during GK radiosurgery treatments.

Indexed as

Biologically effective dose (BED)iso-centre sequencingradiosurgery

Identifiers

PMID33898085
PMCPMC8055240

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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.