Evidence map›Paper›PMID 32021911›Full record

ArticleClinical and translational radiation oncology2020

DCE-MRI assessment of response to neoadjuvant SABR in early stage breast cancer: Comparisons of single versus three fraction schemes and two different imaging time delays post-SABR.

Matthew Mouawad, Heather Biernaski, Muriel Brackstone, Michael Lock, Brian Yaremko, Olga Shmuilovich, Anat Kornecki, Ilanit Ben Nachum, Giulio Muscedere, Kalan Lynn and 4 more

Abstract read
In one paragraph

Article in Clinical and translational radiation oncology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
–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

7 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  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

14 authors.

Matthew MouawadMedical Biophysics, Western University, London, Ontario, Canada.
Heather BiernaskiLawson Health Research Institute, London, Ontario, Canada.
Muriel BrackstoneMedical Biophysics, Western University, London, Ontario, Canada.
Michael LockLondon Health Sciences Centre, London, Ontario, Canada.
Brian YaremkoLondon Health Sciences Centre, London, Ontario, Canada.
Olga ShmuilovichLawson Health Research Institute, London, Ontario, Canada.
Anat KorneckiLawson Health Research Institute, London, Ontario, Canada.
Ilanit Ben NachumLawson Health Research Institute, London, Ontario, Canada.
Giulio MuscedereLawson Health Research Institute, London, Ontario, Canada.
Kalan LynnLawson Health Research Institute, London, Ontario, Canada.
Frank S PratoMedical Biophysics, Western University, London, Ontario, Canada.
R Terry ThompsonMedical Biophysics, Western University, London, Ontario, Canada.
Stewart GaedeMedical Biophysics, Western University, London, Ontario, Canada.
Neil GelmanMedical Biophysics, Western University, London, Ontario, Canada.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo determine the effect of dose fractionation and time delay post-neoadjuvant stereotactic ablative radiotherapy (SABR) on dynamic contrast-enhanced (DCE)-MRI parameters in early stage breast cancer patients. MATERIALS AND

methodsDCE-MRI was acquired in 17 patients pre- and post-SABR. Five patients were imaged 6-7 days post-21 Gy/1fraction (group 1), six 16-19 days post-21 Gy/1fraction (group 2), and six 16-18 days post-30 Gy/3 fractions every other day (group 3). DCE-MRI scans were performed using half the clinical dose of contrast agent. Changes in the surrounding tissue were quantified using a signal-enhancement threshold metric that characterizes changes in signal-enhancement volume (SEV). Tumour response was quantified using K

resultsAll group 1 and 4/6 group 2 patients' SEV increased post-SABR. All group 3 patients' SEV decreased. The mean K

conclusionKinetic parameters measured 2.5 weeks post-SABR in both single fraction and three fraction groups were indicative of response but only the single fraction protocol led to enhancement in the surrounding tissue. Our results also suggest that DCE-MRI one-week post-SABR may be too early for response assessment, at least for single fraction SABR, whereas 2.5 weeks appears sufficiently long to minimize confounding acute effects.

Indexed as

Breast cancerDCE-MRIResponse assessmentSABRTofts model

Identifiers

PMID32021911
PMCPMC6993055

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.