Extreme M0 Values

[AlexMorello]

Dear @agahkarakuzu and @mathieuboudreau,

My task is to account for mutual T1 and T2 effects.
I've exported the T1 values for the slices in question, e.g this one:

However, when switching to M0, the same output is as follows, with a deviation of 545:

[agahkarakuzu]

• Which model?
• Are T1 values accurate?
• What do you expect to see for M0? What do you mean by extreme?

[AlexMorello]

Wow, man, thanks for coming over so quickly.

Here's the scheme I'm supposed to follow:

The T1 seem to be sufficiently accurate. By extreme I mean the deviation, for one, - it's basically 'over 9000', or am I just getting the wrong idea?

[agahkarakuzu]

What I meant was which qmrlab model you used to fit your T1 data. Or did you implement something else in qmrlab and trying to make it work? I am not sure what you are doing with the level of explanation you provided.

Regardless of these, you may consider M0 as a residual from the fit. There's not a standard scale, as you would get with T1. I suggest reading the docs for MTV module (https://qmrlab.readthedocs.io/en/master/mtv_batch.html) to have a sense of how M0 from these fits can be interpreted as proton density.

[AlexMorello]

What I meant was which qmrlab model you used to fit your T1 data. Or did you implement something else in qmrlab and trying to make it work? I am not sure what you are doing with the level of explanation you provided.

Regardless of these, you may consider M0 as a residual from the fit. There's not a standard scale, as you would get with T1. I suggest reading the docs for MTV module (https://qmrlab.readthedocs.io/en/master/mtv_batch.html) to have a sense of how M0 from these fits can be interpreted as proton density.

Hey, thanks for getting back to me again, and for the link! Sorry about being vague :( I used this method initially: https://qmrlab.readthedocs.io/en/master/vfa_t1_batch.html