Full Width at Half Max

Analysis / Modeling
1

Hi,

I am trying to get the full width at half max (FWHM) values from some of the MRS data I have. I am using jMRUI for processing and my data are in SDAT format. Does anyone know if I can measure FWHM from jMRUI directly or there are other ways to do that?

I really would appreciate any help/ insight on this. Thanks!

2

Hi

you can load your data and fit one singlet like tCr at 3ppm with AMARES.
@JanaS could maybe provide a tutorial on how to use AMARES. We had some videos recorded in the past
best
cristina

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3

Hi Cristina,

Thanks for your reply. I can fit the data with AMARES. I am just confused about which of the parameters given by the AMARES method corresponds to the Full Width at Half max.

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Here’s a picture of the AMARES calculation that is done for identifying a water peak on muscle. Which number from the table corresponds to full width at half max in this case? Is it something that’s there directly or do I need to calculate using a parameter that’s in the table?

Thanks for your reply again.

Best,
Roy

4

From your other post, it looks like you found the jMRUI setting to change from damping to linewidth, but in case it’s helpful, linewidth is damping divided by pi.

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5

Hi Meredith,

Thanks for the piece of information.

Yes, I changed damping to linewidth because I read somewhere on the internet that linewidth is equivalent to Full width at Half max, which I am looking for. Is that true for MRS data?

Best,
Roy

6

Yes, that’s correct.

7

Hi Roy,

you can find a lot of details/teaching material here: Chapter 1 Getting started with MRS: A digital collection of community-sourced educational materials | _main.knit (mrshub.github.io)

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