ArticleMagnetic resonance in medicine2022
Volumetric and multispectral DWI near metallic implants using a non-linear phase Carr-Purcell-Meiboom-Gill diffusion preparation.
Article in Magnetic resonance in medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Diffusion-prepared imaging with amplitude navigation for correction of motion-induced signal loss.Magnetic resonance in medicine · 2025Article
- A diffusion-prepared reduced FOV sequence for prostate MRI near metallic implants.Magnetic resonance in medicine · 2025Article
- Diffusion Weighted Magnetic Resonance Imaging of Spinal Cord Injuries After Instrumented Fusion Stabilization.Journal of neurotrauma · 2024Article
- Diffusion-weighted MRI of the spinal cord in cervical spondylotic myelopathy after instrumented fusion.Frontiers in neurology · 2023Article
- Influence of angioplasty and stenting on intracranial artery stenosis: preliminary results of high-resolution vessel wall imaging evaluation.European radiology · 2022Article
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Authors and funding
5 authors.
Funding
Abstract
purposeDWI near metal implants has not been widely explored due to substantial challenges associated with through-slice and in-plane distortions, the increased encoding requirement of different spectral bins, and limited SNR. There is no widely adopted clinical protocol for DWI near metal since the commonly used EPI trajectory fails completely due to distortion from extreme off-resonance ranging from 2 to 20 kHz. We present a sequence that achieves DWI near metal with moderate b-values (400-500 s/mm THEORY AND
methodsMultispectral excitation with Cartesian sampling, view angle tilting, and kz phase encoding reduce in-plane and through-plane off-resonance artifacts, and Carr-Purcell-Meiboom-Gill (CPMG) spin-echo refocusing trains counteract T2* effects. The effect of random phase on the refocusing train is eliminated using a stimulated echo diffusion preparation. Root-flipped Shinnar-Le Roux refocusing pulses permits preparation of a high spectral bandwidth, which improves imaging times by reducing the number of excitations required to cover the desired spectral range. B
resultsNon-linear phase refocusing pulses reduces the peak B
conclusionVolumetric and multispectral DW imaging near metal can be achieved with a 3D encoded sequence.
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