[MINC-users] failures when running N3 with small smoothing distances

[Vitali Zagorodnov]

Hi, I am having two specific failures (see below) when running N3 with
small smoothing distances, <30mm. Has anybody else experience similar
errors? Are these limitations of the algorithm or a bug?

 

1)      Smoothing distance =20mm on some brains only. The error occurs
after iterations are over.

 

nu_correct -clobber -distance 20 001.mnc N3m.mnc -iterations 1000 -stop
0.000100

 

Processing:.............................................................
Done

Not implemented yet in cache_volume_range_has_changed()

Not implemented yet in cache_volume_range_has_changed()

Processing:.............................................................
Done

.

.

Processing:.............................................................
Done

Not implemented yet in cache_volume_range_has_changed()

Not implemented yet in cache_volume_range_has_changed()

Number of iterations: 184 

CV of field change: 9.6316e-05

Transforming
slices:.................................................................
................Done

inputCompactField(): Incorrect number of coefficients

Failure reading field file: /home/zvitali/Desktop/SS226/N3m.imp

nu_evaluate: crashed while running evaluate_field (termination
status=256)

nu_correct: crashed while running nu_evaluate (termination status=256)

 

2)      Smoothing distance =10mm on all brains tested. The error occurs
even before first iteration.

 

nu_correct -clobber -distance 10 001.mnc N3m.mnc -iterations 1000 -stop
0.000100

 

Processing:.............................................................
Done

nu_estimate_np_and_em: crashed while running spline_smooth (termination
status=6)

nu_correct: crashed while running nu_estimate_np_and_em (termination
status=65280)