Ishfaque Ahmed

7 Questions 3 Answers 0 Followers

Questions related from Ishfaque Ahmed

How to generate time series for N variables based on a predefined correlation matrix?

I have a predefined correlation matrix for N variable and want to generate time series for these variables satisfying their correlation. The time could be of any number of data points (i.e.,...

20 December 2022 3,279 2 View

How to get SWI-filtered phase images?

The fractional change in the blood flow can be measured based on the SWI-filtered phase images. I am currently dealing with the generation of SWI-filtered phase images and facing difficulties...

28 July 2022 2,595 0 View

What is the best Toolbox or script to reconstruct image from free induction decay (fid) signal?

I am working with free induction decay (fid) signals and want to construct image including magnitude and phase images. I need suggestions/recommendations about the toolbox and/or script that can...

07 July 2022 4,374 0 View

How read a *.fdf MRI file?

We have data acquired in *.fdf format but unable to visualize it via typical visualizing software/toolbox like we can do for fMRI data. Please suggest me the toolbox, software or converter to...

29 June 2022 3,046 1 View

Is significance level of 5% good to calculate differences b/w 2 groups with any # or there should be correction factor for smaller # of subjects?

We are trying to see significant differences between the correlation matrices of two groups using permutation test. The number of significant edges (cell of correlation matrix) are much higher...

15 June 2022 6,156 0 View

What should be the most appropriate method and/or tool to preprocess DTI images in order to remove eddy and motion artifacts?

We are working on an animal model to see the effects of some diet in terms of functional and structural connectivity. In DTI data, I observed that images scanned at each gradient look...

18 May 2022 3,385 0 View

What is the physical meaning of a precision matrix?

I can understand that the inverse of a covariance matrix is known as the precision matrix. I am curious if anyone can help me to understand the advantages of precision matrix over the correlation...

01 January 1970 1,418 1 View