Evidence map›Paper›PMID 31816176›Full record

ArticleJournal of applied clinical medical physics2020

Small-field dosimetry of TrueBeam

Yuichi Akino, Hirokazu Mizuno, Masaru Isono, Yoshihiro Tanaka, Norihisa Masai, Toshijiro Yamamoto

Abstract readMulticenter Study
In one paragraph

Article in Journal of applied clinical medical physics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing 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

12 citing papers in PubMed.

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  9. Extending the EclipseJournal of applied clinical medical physics · 2023
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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

6 authors.

Yuichi AkinoOncology Center, Osaka University Hospital, Suita, Osaka, Japan.
Hirokazu MizunoDepartment of Medical Physics and Engineering, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
Masaru IsonoDepartment of Radiation Oncology, Osaka International Cancer Institute, Osaka, Japan.
Yoshihiro TanakaDepartment of Radiation Therapy, Japanese Red Cross Society Kyoto Daiichi Hospital, Kyoto Prefecture, Japan.
Norihisa MasaiMiyakojima IGRT Clinic, Miyakojima-ku, Osaka, Japan.
Toshijiro YamamotoDepartment of Radiology, Saiseikai-Noe Hospital, Osaka, Japan.

Funding

JSPS KAKENHI JP17K15802
6 · The paper itself

Abstract

purposeDetector-dependent interinstitutional variations of the beam data may lead to uncertainties of the delivered dose to patients. Here we evaluated the inter-unit variability of the flattened and flattening filter-free (FFF) beam data of multiple TrueBeam (Varian Medical Systems) linear accelerators focusing on the small-field dosimetry.

methodsThe beam data of 6- and 10-MV photon beams with and without flattening filter measured for modeling of an iPLAN treatment planning system (BrainLAB) were collected from 12 institutions - ten HD120 Multileaf Collimator (MLC) and two Millennium120 MLC. Percent-depth dose (PDD), off-center ratio (OCR), and detector output factors (OF

resultsPDD measured with a field size of 5 × 5 mm

conclusionIn this study, the inter-unit variability of small-field dosimetry was evaluated for TrueBeam linear accelerators. The variations were large at a field size of 5 × 5 mm

Indexed as

Phantoms, ImagingPhotonsHumansParticle AcceleratorsRadiation DosageRadiotherapy Planning, Computer-Assistedbeam data commissioningflattening filter-free beamssmall-field dosimetryTrueBeam

Identifiers

PMID31816176
PMCPMC6964782

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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.