Bruker DTI and fixations: ratios?

Owned by Paul Macey
Jul 13, 2022
2 min read

Another idea  re range - simple first step – open some iamges from each session images in mricron, have a column (or mricon windows) for each session, see if you can set intensity ranges to be equalent to capture range of image, and see if the contrast between gray and white looks less in middle session.

 

Paul M. Macey

Professor

Director of Evaluation

UCLA School of Nursing

424-234-3244

 

From: Macey, Paul <>
Sent: Wednesday, July 13, 2022 8:53 AM
To: Luke Henderson <luke.henderson@sydney.edu.au>
Subject: RE: rat MD GM, WM an ratio

 

Hmm….that’s not ideal, middle session ratio is lower for sure

 

What about absolute values, so wm – gm for example?

 

Other thought – maybe images should be scaled to the range of intensities. It looks like the middle session ratio is closer to 1, which suggests less contrast (wm closer to gm). We can expand the contrast by stretching the range…. First does that make sense? Kinda like an intensity range normalization. I would look at something like 95 percentile or interquartile range…. I think the im_info thing does that. First let me know if that makes sense, then we can figure out how to investigate, and then how to adjust.

 

Paul M. Macey

Professor

Director of Evaluation

UCLA School of Nursing

424-234-3244

 

From: Luke Henderson <luke.henderson@sydney.edu.au>
Sent: Wednesday, July 13, 2022 12:36 AM
To: Paul Macey <pmacey@ucla.edu>
Subject: rat MD GM, WM an ratio

 

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What do you think?

 

 

 

 

 

Professor Luke Henderson

The University of Sydney

School of Medical Sciences

Faculty of Medicine and Health

 

Level 1, Brain and Mind Centre

The University of Sydney | NSW | 2006

+61 2 9351 7063

luke.henderson@sydney.edu.au | http://sydney.edu.au

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