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<p class="MsoNormal">Hello all,<o:p></o:p></p>
<p class="MsoNormal">I would like to determine the average FA and ADC values for a given track (in this case, the arcuate). So I followed previous directions posted here and have used the following commands on my arcuate which successfully creates a probability
mask for FA and ADC:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">tracks2prob –template fa.mif Arcuate.tck FA_mask.mif<o:p></o:p></p>
<p class="MsoNormal">tracks2prob –template adc.mif Arcuate.tck ADC_mask.mif<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I then used mrstats to get the average, max, min etc of the tracks by using these commands:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">mrstats fa.mif –mask FA_mask.mif<o:p></o:p></p>
<p class="MsoNormal">mrstats adc.mif –mask ADC_mask.mif<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Which also seemed to work except that I was expecting my FA to range from 0.1 to 1.0 (approximately). Instead, the FA values have a min of 0 and a max of 1.13. In addition, my ADC values have a negative minimum (-0.0024). It seems these
values are out of range and do not make sense but I do not know what I am doing wrong.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance for any help<o:p></o:p></p>
<p class="MsoNormal">Helen<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="color:#365F91">Helen Carlson, Ph.D<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#365F91">Neuroimaging Research Associate<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#365F91">Calgary Pediatric Stroke Program & Neuropsychology<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;color:#365F91">Alberta Children's Hospital<o:p></o:p></span></p>
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