I performed an inversion recovery experiment to obtain the T1 relaxation time of my sample. 9 different vd values where used and 9 FIDs are visible when i open the 2d file. I can also extract them using the rser command or directly via efp.
The problem occurs when I start the dynamics analysis, I cannot extract the 9th spectrum from my data. Slice number 9 always results in the error message "Wrong slice number!". It works when I use slice number 1. But then, during the fitting, the 9th datapoint gives the same value as the first one which completely destroys my fitting and calculating.
This is not the first time I performed that experiment, but the first time that this error occured... The 9th spectra itself looks inverse to the first one. So i would expect the inverse value for the integrals ... (I looked into the report and it really is exactly the same value, therefore I am highly assuming that the mistake is on my side.)
I am doing the processing of the data according to the manuals provided by Broker...
Exactly the same problem occurs for my T1rho values... (again, I already used that program with that same vdlist /vplist)
I tried the "slice" command and used row 9, but i get the error "row 9 out of range 1,...8"
I am quite new to the problem. I hope someone can help me.
Malin Hermeling The "wrong slice number" mistake during FID choosing in Topspin 4.1.4 relaxation analysis is most likely the result of a data collection or processing problem. Among the probable causes are:
- Incorrect slice placement during data acquisition: This can occur if the slices are not captured in the appropriate sequence or if the slice position is not properly configured.
- Incorrect slice numbering in processed data: If the slices were not properly numbered during data processing, the erroneous slice was picked during FID choosing.
- Incorrect parameters utilized during FID picking: This might occur if the incorrect parameters, such as the erroneous echo time or mixing time, were used during FID picking.
To solve this problem, you should look at the following:
- During data gathering and processing, double-check the slice location and numbering.
- Check that the settings used during FID choosing are correct for your data.
- To determine whether the problem remains, reprocess the data with other parameters or with a different processing program.
- If the problem persists, you should also explore the research gate topic or other community forums for similar concerns and potential solutions.
It is crucial to remember that this is basic advise, and it is better to check with the software or hardware provider's support staff.
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