Dear FreeSurfers,

I didn't notice a resolution to this thread. I'm experiencing the same 'problem';

When I run Qdec and perform a Monte Carlo correction of 1.3, the terminal window output gives me the following clusters and values (during the MC correction I used the 'abs' option):

# ClusterNo Max VtxMax Size(mm^2) TalX TalY TalZ CWP CWPLow CWPHi NVtxs Annot

1 -4.665 132680 2413.29 -41.5 2.8 24.3 0.00010 0.00000 0.00020 4785 precentral

2 -3.915 4012 1620.38 -30.7 -26.1 61.8 0.00010 0.00000 0.00020 3811 postcentral

3 -3.257 53060 1559.53 -51.7 -0.2 -23.9 0.00010 0.00000 0.00020 2447 middletemporal

4 -2.846 100336 1266.09 -17.0 30.2 44.1 0.00240 0.00180 0.00300 2203 superiorfrontal

5 -2.676 4834 855.91 -19.3 30.5 -14.5 0.03440 0.03210 0.03670 1194 lateralorbitofrontal

But when (after performing MC correction) I hit the button 'Find Clusters and Goto Max' I get different (less) clusters and different Max and coordinate values:

============================================================

Generating cluster stats using min threshold of 2...

Found 4 clusters

Contrast: 'lh-Avg-thickness-sumD_adh_5_add1_SQRT-Cor', 10fwhm, DOF: 360

ClusterNo Max VtxMax Size(mm2) TalX TalY TalZ NVtxs Annotation

--------- --- ------ --------- ---- ---- ---- ----- ----------

1 -4.0000 0 2413.29 -36.8 -18.3 64.5 4785 precentral

2 -4.0000 17 1620.38 -21.0 -34.8 68.6 3811 postcentral

3 -4.0000 39 1559.53 -53.5 -20.2 -25.5 2447 middletemporal

4 -2.6198 21 1266.09 -6.6 33.8 49.8 2203 superiorfrontal

============================================================

Could you please explain this difference in output and why the Max and coordinate values differ?

Thank you very much for your help!

Best,

Sabine Mous

Sabine Mous, MSc

Department of Child & Adolescent Psychiatry/Psychology

PhD student, Generation R Study

Erasmus MC, room AE-005

P.O.Box 2040

3000 CA Rotterdam

The Netherlands

Phone: (+31) 10 7038019

E-mail: s.mous@erasmusmc.nl

http://www.erasmusmc.nl/kinderenjeugdpsychiatrie

http://www.generationr.nl/