Dear experts, I was wondering how freesurfer corrects for field dishomogeneity. As long as I know, it's automatically done by the software . My concern is because a reviewer has made this comment (please find it below):
"Authors used an old 3 T MRI without using the appropriate pipeline provided by freesurfer to correct for field dysomogeneity" We have run the standard pipeline provided to derive measures of cortical thickness and deep grey matter nuclei volume (FreeSurfer version 5.3.0 ). Here the MRI protocol used: All participants were scanned on a 3-Tesla Philips Intera whole-body MRI scanner. A T1-weighted three-dimensional magnetization-prepared rapid acquisition gradient-echo (MPRAGE; time echo: 4.6 ms; time repetition: 9.7ms; field of view: 240 ms; voxel size= 1 x1 x 1 mm) was acquired. Any clue about? Thank you in advance. BW Clelia . Clelia Pellicano, MD PhD Student in Clinical and Experimental Neurosciences and Psychiatry, Department of Neuroscience, Mental Health and Sensory Organs, NESMOS, Sapienza University Via di Grottarossa 1035, 00189 Rome, Italy phone +390633775579 fax +390633775900 Research Neurologist Department of Clinical and Experimental Neurology Santa Lucia Foundation IRCSS Via Ardeatina 306, 00179, Rome, Italy
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