File:T2 Decay Dispersed (expand the description below for a detailed explanation).webm
T2_Decay_Dispersed_(expand_the_description_below_for_a_detailed_explanation).webm (WebM audio/video file, VP8/Vorbis, length 15 s, 384 × 360 pixels, 495 kbps overall, file size: 909 KB)
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Summary
[edit]| Description |
English: T2 decay is defined as the decay of the perpendicular-component of the magnetic vector and is defined by the equation
B(t)=B0 * e^(-t/T2) In this graphic, the perpendicular component of the vector is the same as the XY-component. Shown are multiple protons in the same magnetic field. The protons in the graphic all have similar but slightly different Larmor frequencies. As a result, their dipoles, which initially align, slowly start to point in many different directions. When this happens, their dipoles effectively cancel each other out. This phenomenon results in loss of signal because the signal that iss measured is the oscillation of net magnetic dipole, not the dipole of an individual proton. If all the protons precess in alignment, their dipoles add up to create a large magnetic dipole that precesses in the XY-plane -- and thus creates magnetic field fluctuations large enough to measure. |
| Date | |
| Source | YouTube: T2 Decay Dispersed (expand the description below for a detailed explanation) – View/save archived versions on archive.org and archive.today |
| Author | Tyler Moore |
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This file, which was originally posted to YouTube: T2 Decay Dispersed (expand the description below for a detailed explanation), was reviewed on 13 February 2020 by the automatic software YouTubeReviewBot, which confirmed that this video was available there under the stated Creative Commons license on that date. This file should not be deleted if the license has changed in the meantime. The Creative Commons license is irrevocable.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:27, 19 June 2018 | 15 s, 384 × 360 (909 KB) | Vislupus (talk | contribs) | Imported media from https://www.youtube.com/watch?v=YUSZoLBgSuA |
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