Evidence map›Paper›PMID 40654326›Full record

ArticleJournal of applied clinical medical physics2025

A novel protocol for parametrization of a beam model for small stereotactic beams.

Tim Melhus, Mohammed Ghazal, Hamza Benmakhlouf

Abstract read
In one paragraph

Article in Journal of applied clinical medical physics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing 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

1 citing paper in PubMed.

  1. 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

3 authors.

Tim MelhusDepartment of Medical Radiation Physics and Nuclear Medicine, Karolinska University Hospital, Stockholm, Sweden.
Mohammed GhazalDepartment of Medical Radiation Physics and Nuclear Medicine, Karolinska University Hospital, Stockholm, Sweden.
Hamza BenmakhloufDepartment of Medical Radiation Physics and Nuclear Medicine, Karolinska University Hospital, Stockholm, Sweden.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionMost Treatment Planning Systems (TPS) utilize parameterized multi-source models to represent the radiation beam of linacs. However, small stereotactic beams require special attention due to the importance of correct spot- and field-size definition. The purpose of this work is to develop a protocol for configuring a beam model that provides accurate representation of stereotactic beams. MATERIAL AND

methods6 MV flattening filter free (FFF) dose-profiles were measured for Millennium multileaf collimator (MLC)-collimated field sizes (2 × 2 cm

resultsImprovement in the agreement between measured and modelled profiles are identified using the suggested protocol. The DLG was determined at an optimum of 0.9 mm for both models whereas the ESS was determined to be (0.5, 0) mm and (1, 0,5) mm for AAA and Acuros XB, respectively. Compared to the standardly configured clinical model, the optimized AAA (Acuros XB) model showed an average improvement in gamma pass-rates of 2% (3%) with film measurements.

conclusionsThe standard protocol for TPS commissioning was shown to produce a sub-optimal beam model for small treatment volumes. The proposed protocol in this work results in a better modelling of small stereotactic beams.

Indexed as

AlgorithmsNeoplasmsParticle AcceleratorsPhantoms, ImagingRadiosurgeryRadiotherapy Planning, Computer-AssistedHumansRadiometryRadiotherapy DosageRadiotherapy, Intensity-Modulatedbeam‐model optimizationdosimetric leaf gapeffective spot sizelinac stereotactic radiotherapy

Identifiers

PMID40654326
PMCPMC12257346

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.