Evidence map›Paper›PMID 39867726›Full record

ArticleClinical and translational radiation oncology2025

Treatment time and learning curve analysis of 1.5 T MR-Linac workflows led by radiation oncologists or therapists.

J M Westerhoff, F J Raaijmakers, L A Daamen, E N de Groot-van Breugel, L T C Meijers, J R N van der Voort van Zyp, J J C Verhoeff, S Mook, H M Verkooijen, M P W Intven

Registry-linked trialAbstract read
In one paragraph

Article in Clinical and translational radiation oncology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04075305 (The Multiple Outcome Evaluation of Radiation Therapy Using the MR-Linac Study), which is not on this map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing 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.

NCT04075305 recruitingnot on this map

The Multiple Outcome Evaluation of Radiation Therapy Using the MR-Linac Study

Typeobservational_patient_registrySponsorUMC UtrechtRan2019 to 2030Enrolled8,000ConditionsOncology, Breast Cancer, Prostate Cancer, Gynecologic CancerArmsRadiation therapy
3 · Its place in the literature

Who cites it

7 citing papers in PubMed.

  1. Article
  2. Review
  3. Article
  4. Article
  5. Article
  6. Review
  7. 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

10 authors.

J M WesterhoffUniversity Medical Center Utrecht, Division of Imaging and Oncology, Utrecht, the Netherlands.
F J RaaijmakersUniversity Medical Center Utrecht, Division of Imaging and Oncology, Utrecht, the Netherlands.
L A DaamenUniversity Medical Center Utrecht, Division of Imaging and Oncology, Utrecht, the Netherlands.
E N de Groot-van BreugelUniversity Medical Center Utrecht, Department of Radiation Oncology, Utrecht, the Netherlands.
L T C MeijersUniversity Medical Center Utrecht, Department of Radiation Oncology, Utrecht, the Netherlands.
J R N van der Voort van ZypUniversity Medical Center Utrecht, Department of Radiation Oncology, Utrecht, the Netherlands.
J J C VerhoeffUniversity Medical Center Utrecht, Department of Radiation Oncology, Utrecht, the Netherlands.
S MookUniversity Medical Center Utrecht, Department of Radiation Oncology, Utrecht, the Netherlands.
H M VerkooijenUniversity Medical Center Utrecht, Division of Imaging and Oncology, Utrecht, the Netherlands.
M P W IntvenUniversity Medical Center Utrecht, Department of Radiation Oncology, Utrecht, the Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background and purpose: This study assessed the treatment time of online adaptive (i.e. Adapt-to-Shape, ATS) and virtual couch shift (i.e. Adapt-to-Position, ATP) magnetic resonance guided radiotherapy (MRgRT) on a 1.5 Tesla MR-Linac. Additionally, the transition from a radiation oncologists (RO)-led to a radiation therapist (RTT)-led workflow, and the presence of a learning curve were assessed. Materials and methods: This study was conducted utilizing the prospective Multi-OutcoMe EvaluatioN of radiation Therapy Using the MR-Linac study (MOMENTUM, NCT04075305). Mean (±standard deviation) online adaptation time and total treatment time were collected from MR-Linac log files. Learning and proficiency phases were defined using a cumulative sum (CUSUM) analysis. Independent T-tests were performed. A p-value < 0.01 was considered statistically significant. Results: In total, 4942 fractions of 645 patients were included. Mean total treatment time was 39 (±7), 15 (±2), 34 (±8), 41 (±11), and 40 (±7) minutes for ATS-treated prostate cancer, ATP-treated prostate cancer, ATS-treated pelvic lymph node metstasis (LNM), ATS-treated abdominal LNM and ATS-treated rectal cancer, respectively. Mean online adaptation time of RO-led and RTT-led treatment was 28 (±6) and 25 (±6) minutes (p < 0.001) for ATS-treated prostate cancer. No significant differences in the remaining subgroups were found. In subgroups with a learning curve, mean online adaptation time of learning and proficiency phase were 30 (±6) and 26 (±5) minutes (p < 0.001) for ATS-treated prostate cancer, 27 (±8) and 19 (±7) minutes for pelvic LNM (p < 0.001), and 29 (±7) and 25 (±7) minutes (p < 0.001) for rectal cancer, respectively. Conclusion: The transition from RO-led to RTT-led workflows did not significantly increase total treatment time. The online adaptation time reduced after a learning curve for ATS-treated prostate cancer, pelvic LNM and rectal cancer.

Identifiers

PMID39867726
PMCPMC11759539

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Registered trials

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.