Hi Conn Experts,
First of all thank you to the team for making such a wonderful toolbox.
I have few queries regarding denoising and frequency decomposition.
I ran Conn analysis to check for any frequency dependent effects on a particular patient group ( with filter bank n =4, which created four additional frequency bands in the Condition set up After analyzing the results, I could see there are more newer and useful fmri activations seen in each of the four conditions created than that were seen in the original frequency band ( default frequency 0.008Hz - 0.09Hz). Can this this be seen as an advantage and reported as a better technique compared to
Original full band frequency. ( no decomposition). Could the frequency decomposition technique of discrete cosine transformation used in conn be attributed to this?. Is there any article which explains the use of sub band coding using DCT in conn which could be cited?
I also ran analysis with filter bank n = 3 and 5. As the conditions increases, I have more number of unique activations which could not ne seen when the original rest condition frequency alone was applied.
I would like to know if the frequency decomposition using dct is helping to extract more physiological features (fmri activations)
Could Frequency decomposition into equal bands by dct be reported as a better approach in our study ? Or could this be some noise or other phenomena we are not aware of?
First of all thank you to the team for making such a wonderful toolbox.
I have few queries regarding denoising and frequency decomposition.
I ran Conn analysis to check for any frequency dependent effects on a particular patient group ( with filter bank n =4, which created four additional frequency bands in the Condition set up After analyzing the results, I could see there are more newer and useful fmri activations seen in each of the four conditions created than that were seen in the original frequency band ( default frequency 0.008Hz - 0.09Hz). Can this this be seen as an advantage and reported as a better technique compared to
Original full band frequency. ( no decomposition). Could the frequency decomposition technique of discrete cosine transformation used in conn be attributed to this?. Is there any article which explains the use of sub band coding using DCT in conn which could be cited?
I also ran analysis with filter bank n = 3 and 5. As the conditions increases, I have more number of unique activations which could not ne seen when the original rest condition frequency alone was applied.
I would like to know if the frequency decomposition using dct is helping to extract more physiological features (fmri activations)
Could Frequency decomposition into equal bands by dct be reported as a better approach in our study ? Or could this be some noise or other phenomena we are not aware of?