Evidence map›Paper›PMID 25128709›Full record

ArticleNeuroImage2014

Improving diffusion-weighted imaging of post-mortem human brains: SSFP at 7 T.

Sean Foxley, Saad Jbabdi, Stuart Clare, Wilfred Lam, Olaf Ansorge, Gwenaelle Douaud, Karla Miller

Abstract read
In one paragraph

Article in NeuroImage, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing 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

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

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  7. Beyond the surface: howFrontiers in neuroscience · 2024
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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

7 authors.

Sean FoxleyFMRIB Centre, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK. Electronic address: sean.foxley@ndcn.ox.ac.uk.
Saad JbabdiFMRIB Centre, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK.
Stuart ClareFMRIB Centre, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK.
Wilfred LamFMRIB Centre, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK.
Olaf AnsorgeDivision of Clinical Neurology, University of Oxford, Oxford, UK.
Gwenaelle DouaudFMRIB Centre, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK.
Karla MillerFMRIB Centre, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK.

Funding

Medical Research Council G0700399Medical Research Council MR/K006673/1Medical Research Council MR/K02213X/1Medical Research Council MR/L009013/1Medical Research Council MR/L022656/1Wellcome TrustWellcome Trust 091509/Z/10/Z
6 · The paper itself

Abstract

Post-mortem diffusion imaging of whole, human brains has potential to provide data for validation or high-resolution anatomical investigations. Previous work has demonstrated improvements in data acquired with diffusion-weighted steady-state free precession (DW-SSFP) compared with conventional diffusion-weighted spin echo at 3T. This is due to the ability of DW-SSFP to overcome signal-to-noise and diffusion contrast losses brought about by tissue fixation related decreases in T2 and ADC. In this work, data of four post-mortem human brains were acquired at 3T and 7 T, using DW-SSFP with similar effective b-values (b(eff)~5150 s/mm(2)) for inter-field strength comparisons; in addition, DW-SSFP data were acquired at 7 T with higher b(eff) (~8550 s/mm(2)) for intra-field strength comparisons. Results demonstrate that both datasets acquired at 7 T had higher SNR and diffusion contrast than data acquired at 3T, and data acquired at higher b(eff) had improved diffusion contrast than at lower b(eff) at 7 T. These results translate to improved estimates of secondary fiber orientations leading to higher fidelity tractography results compared with data acquired at 3T. Specifically, tractography streamlines of cortical projections originating from the corpus callosum, corticospinal tract, and superior longitudinal fasciculus were more successful at crossing the centrum semiovale and projected closer to the cortex. Results suggest that DW-SSFP at 7 T is a preferential method for acquiring diffusion-weighted data of post-mortem human brain, specifically where the primary region of interest involves crossing white matter tracts.

Indexed as

AutopsyBrainDiffusion Magnetic Resonance ImagingDiffusion Tensor ImagingHumansSignal-To-Noise RatioWhite Matter7TDiffusion tensor imagingDiffusion-weighted steady-state free precessionMRIPost-mortem human brainTractography

Identifiers

PMID25128709
PMCPMC4229505

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Registered trials

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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.