ArticleMagnetic resonance in medicine2021
Dynamic B
Article in Magnetic resonance in medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
What it found
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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.
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.
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Who cites it
10 citing papers in PubMed, 17 citations in OpenAlex.
- Field-Based Spatial Self-Registration of Multicoil Hardware for BMagnetic resonance in medicine · 2026Article
- Correcting motion-related BScientific reports · 2026Article
- Impact of through-slice gradient optimization for dynamic slice-wise shimming in the cervico-thoracic spinal cord.Magnetic resonance in medicine · 2025Article
- Imaging the Internal Auditory Canal with an 8 × 2 Transceiver Array Head Coil at 7T.AJNR. American journal of neuroradiology · 2025Article
- Dynamic BMagnetic resonance in medicine · 2025Article
- Leveraging ultra-high field (7T) MRI in psychiatric research.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2024Review
- Advancements in MR hardware systems and magnetic field control: BPsychoradiology · 2024Review
- Map-based BNMR in biomedicine · 2023Article
- Improving brain BMagma (New York, N.Y.) · 2022Article
- Application of an integrated radio-frequency/shim coil technology for signal recovery in fMRI.Magnetic resonance in medicine · 2021Article
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
Abstract
purposeTo describe and implement a strategy for dynamic slice-by-slice and multiband B THEORY: For thin axial slices, spherical harmonic shims can be divided into pairs of shims (z-degenerate and non-z-degenerate) that are spatially degenerate, such that only ½ of the shims (non-z-degenerate) are required for single slice optimizations. However, when combined, the pairs of shims can be used to simultaneously generate the same in-plane symmetries but with different amplitudes as a function of their z location. This enables multiband shimming equivalent to that achievable by single slice-by-slice optimization.
methodsAll data were acquired at 7T using a spherical harmonic shim insert enabling shimming up through 4th order with two additional 5th order shims (1st-4th+). Dynamic shim updating was achieved using a 10A shim power supply with 2 ms ramps and constrained optimizations to minimize eddy currents.
resultsIn groups of eight subjects, we demonstrated that: 1) dynamic updating using 1st-4th+ order shims reduced the SD of the B
conclusionHigh order spherical harmonics provide substantial improvements over static global shimming and enable dynamic multiband shimming with near equivalent performance to that of dynamic slice-by-slice shimming. This reduces distortion in echo planar imaging.
Indexed as
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What OpenQuestion holds
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.