Dear all expert,<div><br></div><div>Hello, I have been trying to solve this WM/GM boundary error. </div><div>The data I attached here have a lots of problems, especially WM/GM boundary was not detected in temporal areas.</div>
<div>Using mri_cnr function, I calculated the gray/white CNR of the norm.mgz.</div><div><br></div><div>---------------------------------</div><div>norm.mgz</div><div><br></div><div><div>white = 97.3+-10.3, gray = 77.3+-14.8, csf = 55.6+-19.5</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>gray/white CNR = 1.222, gray/csf CNR = 0.790</div><div>lh CNR = 1.006</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre">	</span>white = 97.0+-11.2, gray = 76.9+-15.1, csf = 55.9+-19.3</div>
<div><span class="Apple-tab-span" style="white-space:pre">	</span>gray/white CNR = 1.139, gray/csf CNR = 0.737</div><div>rh CNR = 0.938</div><div>total CNR = 0.972</div></div><div>----------------------------------</div><div>
<br></div><div>1. Does the low CNR affect the bad tissue segmentation results?</div><div>How can I solve the problem? </div><div>Is there a way to improve the low CNR value?</div><div><br></div><div>2. How can I delete the continuous areas, indicated by red arrow  (axial, 134)?</div>
<div><br></div><div><br></div><div>I use freesurfer-Darwin-leopard-i686-stable-pub-v5.1.0.</div><div><br></div><div><br></div><div>Thank you for any comments or replies in advance.</div><div><br></div><div><br></div><div>
Best, </div><div><br></div><div>EK</div>