Talk:Spin–lattice relaxation

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Merge T1 relaxography proposal[edit]

Sehvohn

I'm just going to be bold and merge, setting T1 relaxography as a redirect. David Ruben ^Talk 20:08, 5 July 2010 (UTC)[reply]

There is certainly a difference. A normal T1 weighted image shows the signal returned from a voxel, which is influenced by T1 (but also to some extent by T2, T2*), but this is not equal to the T1 value at that point. What was described in the T1 relaxography article is more commonly known as T1 mapping. Using this method you can acquire T1 values for each voxel. This is done by measuring multiple (at least two, but usually more) points on the relaxation curve, from which you can calculate the T1. --WS (talk) 13:57, 7 July 2010 (UTC)[reply]

Should aricfle be recreated therefore as T1 mapping? (would need a reference other that that previously used which was of multislicing for quicker scans, rather than repeated measurement of the same voxel). David Ruben ^Talk 17:53, 7 July 2010 (UTC)[reply]

It can easily be fitted into this article. I will write a paragraph on it when I have some time. The reference was perfectly fine, it is about using a fast image acquisition sequence (echoplanar imaging) for T1 mapping exactly because you need multiple measurements from each voxel, which takes a lot of time. EPI is one of the fastest sequences in clinical use, rather than line by line, images are acquired completely after one excitation. --WS (talk) 21:37, 7 July 2010 (UTC)[reply]

How T1 is actually measured[edit]

I don't understand the explanation in this article. It says the RF signal emitted after RF excitation decays exponentially with a time constant T1. But isn't that decay the free induction decay? Which has a T2* relax time constant? After being excited protons will emit a single radio frequency signal, which I though is the FID signal. This contains T2* which in turn contains T2 and Tinhom. So how does FID actually contain T1? Timur lenk (talk) 08:39, 18 September 2012 (UTC)[reply]

Merger proposal[edit]

I propose to merge Spin–lattice relaxation in the rotating frame into Spin–lattice relaxation. I think that the content in the rotating frame article can easily be explained in the context of main article, and this article is of a reasonable size that the merging will not cause any problems as far as article size is concerned. ReyHahn (talk) 09:57, 4 October 2020 (UTC)[reply]

Merger complete. Klbrain (talk) 14:31, 23 October 2021 (UTC)[reply]