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We have noted some issues with the processing of the FLAIR images when using the FLAIRpial option with 7.3.2. In the attached PDF file the top row shows the FLAIR.prenorm.mgz images while the lower row shows the FLAIR.mgz images (the FLAIR.norm.mgz looked visually to be the same as the FLAIR.mgz image). There is some interesting contrast, particularly in the brainstem and around the corpus callosum, in the FLAIR.mgz image which is not apparent in the FLAIR.prenorm image, is this really something that one would expect from the image normalization? The recon-all log file is attached, as is the expert _options file used for this subject. We also saw the same effect when running 7.3.2 on a MacBook Pro fitted with a M1 Max processor and running the Ventura OS.

Richard Jones Medical Physicist | Department of Radiology | Children's Healthcare of Atlanta * 404-785-5381 | *: richard.jones@choa.orgmailto:richard.jones@choa.org