Evidence map›Paper›PMID 31707918›Full record

ArticleTechnology in cancer research & treatment

Dosimetric Characterization of the Dual Layer MLC System for an O-Ring Linear Accelerator.

Michele M Kim, Douglas Bollinger, Chris Kennedy, Wei Zou, Ryan Scheuermann, Boon-Keng Kevin Teo, James M Metz, Lei Dong, Taoran Li

Abstract read
In one paragraph

Article in Technology in cancer research & treatment. 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.

  1. Article
  2. Article
  3. A multi-institution performance assessment of a double-layer MLC.Journal of applied clinical medical physics · 2025
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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

9 authors.

Michele M KimDepartment of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA.ORCID 0000-0003-1100-1298
Douglas BollingerDepartment of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA.
Chris KennedyDepartment of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA.
Wei ZouDepartment of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA.
Ryan ScheuermannDepartment of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA.
Boon-Keng Kevin TeoDepartment of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA.
James M MetzDepartment of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA.
Lei DongDepartment of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA.
Taoran LiDepartment of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The Halcyon is Varian's latest linear accelerator that offers a single 6X flattening-filter-free beam with a jawless design that features a new dual layer multileaf collimator system with faster speed and reduced transmission. Dosimetric characteristics of the dual layer multileaf collimator system including transmission, dosimetric leaf gap, and tongue and groove effects were measured. Ionization chambers, diode arrays, and an electronic portal imaging device were used to measure various multileaf collimator characteristics. Transmission through both multileaf collimator banks was found to be 0.008%, while the distal and proximal banks alone had transmission values of 0.4%. The penumbra was slightly sharper for fields using only the distal multileaf collimator bank but found to be largely independent of leaf position with values between 2.7 to 3.0 mm at d

Indexed as

Particle AcceleratorsRadiometryRadiotherapy Planning, Computer-AssistedHumansModels, TheoreticalRadiotherapy DosageRadiotherapy, Intensity-Modulateddosimetric leaf gapdynamic beam flatteningHalcyonMLCmultileaf collimatortongue and groove

Identifiers

PMID31707918
PMCPMC6843729

What OpenQuestion holds

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LicenceCC BY-NC
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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.