Talk:Spin echo

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Echo Train?

I am studying NMR and solid state NMR. I would find it useful to find a section regarding using the hahn echo to create an echo train (like in the CPMG experiment), however I do not have the confidence to write it myself. — Preceding unsigned comment added by 159.92.238.51 (talk) 10:10, 12 September 2016 (UTC)[reply]

old comment

I disagree with the rating of LOW importance. Spin-echo is very often referred to in courses as the most basic MRI sequence -- that is its the first thing a student learning about NMR or MRI will want to figure out. Its important that the introduction to this field be a well-written article, possible aimed at a technical but non-expert audience. Salsasam (talk) 00:41, 16 December 2008 (UTC)[reply]

Conflict of Interest Statement

One of the contributors to this article, AFiller, has a patent in this field - see User:afiller for full conflict of interest statement

Another contributor to this article (GavinMorley) also has patents that relate to spin echoes. See User:GavinMorley for more details.

What exactly is meant with the angles? i.e. 90 and 180 degrees?

I used to study physics, but it is entirely obscure what the angles here mean. Are these phase angles? Or orientation angles of the coils? A physical derivation might be clearer? — Preceding unsigned comment added by 81.11.191.62 (talk) 09:00, 15 January 2015 (UTC)[reply]

These angles are the angle through which a pulse rotates the spins in the Bloch sphere. GavinMorley (talk) 15:40, 20 January 2015 (UTC)[reply]

T1 and T2 discussed in the text should be related to the images/videos

Presumably T1 and T2 in the text refer to the 1st t and 2nd t, respectively, in the x-axis of the images and videos. For clarity, these ts should be labeled as t1 and t2, respectively. — Preceding unsigned comment added by Guozk2 (talk • contribs) 17:20, 10 February 2016 (UTC)[reply]

Tau in Stimulated Echo

It seems to me that the times between pulses and echo are not necessarily equal, and therefore require subscripts to distinguish them, for example,

tau,1=t,pulse2 - t,pulse1 tau,2=t,pulse3 - t,pulse2 tau,3=t,echo - t,pulse3

(Unfortunately, I lack the required coding skills to change it and have no time to teach myself, at present)

In any case, might anyone disagree with this logic? Thedoctorissick (talk) 17:21, 11 April 2016 (UTC)[reply]

Photon echo

Why is this article called "Spin echo" when the section on Photon echo makes it clear that this rephasing echo effect is more general than just applying to spin? 162.246.139.210 (talk) 15:46, 17 May 2024 (UTC)[reply]

Because photon echo is a spin echo.--ReyHahn (talk) 10:46, 18 May 2024 (UTC)[reply]