Can source data be exported after source imaging in Brainstorm?

Hi~ I am doing source imaging by EEG in Brainstorm. I found that we only obtained images after computing sources. Is it possible to gain the source data array?
Also, if I do the time-frequency analysis after source imaging, is it possible to export the time-frequency image or the data itself?

Thanks a lot!

All the data is available in .mat files that you can directly read or access with Brainstorm functions.
See the Scripting tutorial, which explains all the aspects of interacting with Brainstorm from a custom script:
https://neuroimage.usc.edu/brainstorm/Tutorials/Scripting

Dear Francois, I really appreciate for your help. I have read the tutorial and I could gain the data after time- frequency analysis successfully by following its instructions. However, I met a problem when I wanted to export the source data.

After this operation, I only gained the transfer matrix, which looks like this:

Its shape is 15002 (num of sources) x 32 (channels). While what I want is the source signal matrix which shape is 15002 (num of sources) x 8064 (time points).

Would yoou please tell me what's going on here? Did I do something wrong? Will it possible for me to gain the source signal matrix?
I am quite looking forward to your reply, thank you for your time.

https://neuroimage.usc.edu/brainstorm/Tutorials/SourceEstimation#Computing_sources_for_single_trials
https://neuroimage.usc.edu/brainstorm/Tutorials/SourceEstimation#On_the_hard_drive

It did help me a lot. Thank you very much, Francois!
And I wuld like to aplogize for my late reply...

Best wishes,
Shuyi