Evidence map›Paper›PMID 26385804›Full record

ArticleEuropean radiology2016

Assessment of repeatability and treatment response in early phase clinical trials using DCE-MRI: comparison of parametric analysis using MR- and CT-derived arterial input functions.

Mihaela Rata, David J Collins, James Darcy, Christina Messiou, Nina Tunariu, Nandita Desouza, Helen Young, Martin O Leach, Matthew R Orton

Open access · hybridAbstract readClinical Trial, Phase I
In one paragraph

Article in European radiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed, 2 pooled it
1.9field-weighted citation impact, top 15% of its field
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

32 citing papers in PubMed, 2 syntheses or guidelines pooled it, 49 citations in OpenAlex.

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  17. DCE-MRI is more sensitive than IVIM-DWI for assessing anti-angiogenic treatment-induced changes in colorectal liver metastases.Cancer imaging : the official publication of the International Cancer Imaging Society · 2021
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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 at 4 institutions in 1 country.

Mihaela RataCR-UK Cancer Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research and Royal Marsden Hospital, London, UK.
David J CollinsCR-UK Cancer Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research and Royal Marsden Hospital, London, UK.
James DarcyCR-UK Cancer Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research and Royal Marsden Hospital, London, UK.
Christina MessiouCR-UK Cancer Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research and Royal Marsden Hospital, London, UK.
Nina TunariuCR-UK Cancer Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research and Royal Marsden Hospital, London, UK.
Nandita DesouzaCR-UK Cancer Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research and Royal Marsden Hospital, London, UK.
Helen YoungEarly Clinical Development, AstraZeneca, Macclesfield, Cheshire, UK.
Martin O LeachCR-UK Cancer Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research and Royal Marsden Hospital, London, UK. Martin.Leach@icr.ac.uk.
Matthew R OrtonCR-UK Cancer Imaging Centre, Division of Radiotherapy and Imaging, Institute of Cancer Research and Royal Marsden Hospital, London, UK.
Royal Marsden Hospital · GBInstitute of Cancer Research · GBAstraZeneca (United Kingdom) · GBRoyal Marsden NHS Foundation Trust · GB

Funding

Cancer Research UK 16464
6 · The paper itself

Abstract

objectivesPharmacokinetic (PK) modelling of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) data requires a reliable measure of the arterial input function (AIF) to robustly characterise tumour vascular properties. This study compared repeatability and treatment-response effects of DCE-MRI-derived PK parameters using a population-averaged AIF and three patient-specific AIFs derived from pre-bolus MRI, DCE-MRI and dynamic contrast computed tomography (DC-CT) data.

methodsThe four approaches were compared in 13 patients with abdominal metastases. Baseline repeatability [Bland-Altman statistics; coefficient of variation (CoV)], cohort percentage change and p value (paired t test) and number of patients with significant DCE-MRI parameter change post-treatment (limits of agreement) were assessed.

resultsIndividual AIFs were obtained for all 13 patients with pre-bolus MRI and DC-CT-derived AIFs, but only 10/13 patients had AIFs measurable from DCE-MRI data. The best CoV (7.5 %) of the transfer coefficient between blood plasma and extravascular extracellular space (K (trans)) was obtained using a population-averaged AIF. All four AIF methods detected significant treatment changes: the most significant was the DC-CT-derived AIF. The population-based AIF was similar to or better than the pre-bolus and DCE-MRI-derived AIFs.

conclusionsA population-based AIF is the recommended approach for measuring cohort and individual effects since it has the best repeatability and none of the PK parameters derived using measured AIFs demonstrated an improvement in treatment sensitivity. KEY POINTS: • Pharmacokinetic modelling of DCE-MRI data requires a reliable measure of AIF. • Individual MRI-DCE-derived AIFs cannot reliably be extracted from patients. • All four AIF methods detected significant K (trans) changes after treatment. • A population-based AIF can be recommended for measuring cohort treatment responses in trials.

Indexed as

Abdominal NeoplasmsAdultAgedAlgorithmsAntineoplastic AgentsAortaComputer SimulationContrast MediaFemaleHumansImage EnhancementImage Interpretation, Computer-AssistedIndolesMagnetic Resonance ImagingMaleMiddle AgedAntineoplastic AgentscediranibContrast MediaIndolesQuinazolinesClinical trials, phase 1Comparative studyComputed tomographyDrug evaluationMagnetic resonance imaging

Identifiers

PMID26385804
PMCPMC4902841
OpenAlexW2157378420

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.