File:T1 Decay (expand the description below for a detailed explanation).webm
T1_Decay_(expand_the_description_below_for_a_detailed_explanation).webm (WebM audio/video file, VP8/Vorbis, length 15 s, 256 × 240 pixels, 43 kbps overall, file size: 79 KB)
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Summary
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English: The return of the dipole to equilibrium is described mathematically as two components: T1 and T2.
T1 decay describes how the parallel-component of the magnetic field returns to equilibrium. It is defined by the equation B(t) = B0 * (1-e^(-t/T1)) The only important thing to understand from this equation is that the bigger T1 is, the longer it takes for the dipole to go back to realign with the magnetic field. In this graphic (and in all graphics in this tutorial), the parallel-component of the vector is the same as the Z-component. Shown is a dipole precessing from the +x-axis to the +Z-axis. The XY-component of the dipole is shown throughout the precession and is traced in blue. Even though T1 is defined with respect to the Z-component, it's important to remember that T1 decay affects the XY-component because, as was mentioned before, it is the precession of the XY-component that is measurable. Thus, the larger T1, the longer a signal from a given proton will stick around. A proton with a short T1, however, will snap back toward the Z-axis very quickly, and the signal measured from such a proton will decay quickly. |
| Date | |
| Source | YouTube: T1 Decay (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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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:27, 19 June 2018 | 15 s, 256 × 240 (79 KB) | Vislupus (talk | contribs) | Imported media from https://www.youtube.com/watch?v=A0dl4_wxr1c |
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