ArticleMagnetic resonance in medicine2019
Maxwell-compensated design of asymmetric gradient waveforms for tensor-valued diffusion encoding.
Article in Magnetic resonance in medicine, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 70 papers.
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70 citing papers in PubMed.
- Technical Feasibility of IVIM for Prostate Cancer Imaging Using High-Amplitude Whole-Body Gradient System With Spiral Readout and Velocity-Compensated Diffusion Encoding.NMR in biomedicine · 2026Article
- Developing an SNR-efficient tensor-valued diffusion encoding protocol for studying brain microstructural changes in neurodegeneration.medRxiv : the preprint server for health sciences · 2026Article
- Concomitant Gradient Effects Across Field Strengths and Gradient Amplitudes: Improved Estimation of Errors and Correction of Concomitant Dephasing and Diffusion Weighting.Magnetic resonance in medicine · 2026Article
- Characterising the Diffusion Functional Signature of Negative BOLD With Interleaved TMS-fMRI in the Human Brain.Human brain mapping · 2026Article
- Restriction-Weighted Q-Space Trajectory Imaging (ResQ): Toward Mapping Diffusion-Time Effects With Tensor-Valued Diffusion Encoding in Human Prostate Cancer Xenografts.NMR in biomedicine · 2026Article
- Tensor-Valued Diffusion MRI for Microstructural Assessment During Stereotactic Radiotherapy of Brain Metastases: A Feasibility Study.Tomography (Ann Arbor, Mich.) · 2026Article
- Geometry of the cumulant series in diffusion MRI.Nature communications · 2026Article
- What If Each Voxel Were Measured With a Different Diffusion Protocol?Magnetic resonance in medicine · 2026Article
- Modeling the MRI gradient system with a temporal convolutional network: Improved reconstruction by prediction of readout gradient errors.Magnetic resonance in medicine · 2026Article
- Analysis of cortical dysplasias using b-tensor encoding diffusion MRI in an animal model.PloS one · 2026Article
- High-density MRI coil arrays with integrated field monitoring systems for human connectome mapping.Magnetic resonance in medicine · 2025Article
- Diffusion MRI in the cortex of the brain: Reducing partial volume effects from CSF and white matter in the mean diffusivity using high b-values and spherical b-tensor encoding.Magnetic resonance in medicine · 2025Article
- Engineering clinical translation of OGSE diffusion MRI.Magnetic resonance in medicine · 2025Review
- Article
- Reproducibility of liver ADC measurements using first moment optimized diffusion imaging.Magnetic resonance in medicine · 2025Article
- Spectral principal axis system (SPAS) and tuning of tensor-valued encoding for microscopic anisotropy and time-dependent diffusion in the rat brain.Imaging neuroscience (Cambridge, Mass.) · 2025Article
- In vivo diffusion MRI of the human heart using a 300 mT/m gradient system.Magnetic resonance in medicine · 2024Article
- Imaging evaluation focused on microstructural tissue changes using tensor-valued diffusion encoding in breast cancers after neoadjuvant chemotherapy: is it a promising way forward?Gland surgery · 2024Article
- Compartmental anisotropy of filtered exchange imaging (FEXI) in human white matter: What is happening in FEXI?Magnetic resonance in medicine · 2024Article
- Assessment of precision and accuracy of brain white matter microstructure using combined diffusion MRI and relaxometry.Human brain mapping · 2024Article
10 more citing papers are in PubMed but not listed here.
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Abstract
purposeDiffusion encoding with asymmetric gradient waveforms is appealing because the asymmetry provides superior efficiency. However, concomitant gradients may cause a residual gradient moment at the end of the waveform, which can cause significant signal error and image artifacts. The purpose of this study was to develop an asymmetric waveform designs for tensor-valued diffusion encoding that is not sensitive to concomitant gradients.
methodsThe "Maxwell index" was proposed as a scalar invariant to capture the effect of concomitant gradients. Optimization of "Maxwell-compensated" waveforms was performed in which this index was constrained. Resulting waveforms were compared to waveforms from literature, in terms of the measured and predicted impact of concomitant gradients, by numerical analysis as well as experiments in a phantom and in a healthy human brain.
resultsMaxwell-compensated waveforms with Maxwell indices below 100 (mT/m)
conclusionConstraining the Maxwell index in the optimization of asymmetric gradient waveforms yields efficient diffusion encoding that negates the effects of concomitant fields while enabling arbitrary shapes of the b-tensor. This waveform design is especially useful in combination with strong gradients, long encoding times, thick slices, simultaneous multi-slice acquisition, and large FOVs.
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