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Blog (page 27,111)

Noise is the voltage induced in the receiver coil by the pre…

Posted on: June 17, 2025 Last updated on: June 17, 2025 Written by: Anonymous
Noise is the voltage induced in the receiver coil by the precession of the net magnetic vector (NMV) in the transverse plane.
Continue reading “Noise is the voltage induced in the receiver coil by the pre…”…

Doubling this parameter will double the amount of data store…

Posted on: June 17, 2025 Last updated on: June 17, 2025 Written by: Anonymous
Doubling this parameter will double the amount of data stored in each line of k-space:
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Ghosting artifacts can be caused by moving anatomy in the fr…

Posted on: June 17, 2025 Last updated on: November 19, 2025 Written by: Anonymous
Ghosting artifacts can be caused by moving anatomy in the frequency encoding direction.
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The current Dixon-type sequences produce four sets of images…

Posted on: June 17, 2025 Last updated on: June 17, 2025 Written by: Anonymous
The current Dixon-type sequences produce four sets of images, water only, fat only, in-phase, and out-of-phase, due to acquiring echos with different TRs and the same TEs.
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To saturate fat, water or silicone signal, a 90° pre-saturat…

Posted on: June 17, 2025 Last updated on: June 17, 2025 Written by: Anonymous
To saturate fat, water or silicone signal, a 90° pre-saturation RF pulse is applied at the precessional frequency of the nuclei to the whole FOV.
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A patient being in contact with the coil can lead to shading…

Posted on: June 17, 2025 Last updated on: June 17, 2025 Written by: Anonymous
A patient being in contact with the coil can lead to shading artifacts.
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Intra-voxel dephasing refers to phase differences in flowing…

Posted on: June 17, 2025 Last updated on: June 17, 2025 Written by: Anonymous
Intra-voxel dephasing refers to phase differences in flowing and stationary nuclei within the same voxel.
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What happens to SNR when the receive bandwidth (RBW) is decr…

Posted on: June 17, 2025 Last updated on: June 17, 2025 Written by: Anonymous
What happens to SNR when the receive bandwidth (RBW) is decreased?
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Why is it important to ensure that all coils outside the FOV…

Posted on: June 17, 2025 Last updated on: June 17, 2025 Written by: Anonymous
Why is it important to ensure that all coils outside the FOV are turned off?
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What aspect of a patient could exacerbate the dielectric eff…

Posted on: June 17, 2025 Last updated on: June 17, 2025 Written by: Anonymous
What aspect of a patient could exacerbate the dielectric effect artifact?
Continue reading “What aspect of a patient could exacerbate the dielectric eff…”…
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