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Manpage of adcfit
adcfit
Section: User Commands (1)
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NAME
adcfit - Fits the apparent diffusion coefficient to diffusion MRI
measurements.
SYNOPSIS
adcfit
<data file> <scheme file>
DESCRIPTION
Reads diffusion MRI data, acquired using the acquisition scheme
detailed in the scheme file, from the data file. The data file stores
the diffusion MRI data in voxel order with the measurements stored as
big-endian four-byte floats and ordered as in the scheme file. See
modelfit(1) and camino(1) for the format of the data file and scheme
file. The program fits the apparent diffusion coefficient to the
measurements in each
voxel and outputs the results, in voxel order and as big-endian
eight-byte doubles, to the standard output. The program outputs three
values in each voxel: [exit code, ln(S(0)), ADC]. An exit code of
zero indicates no problems. For a list of other exit codes, see
modelfit(1). The value of S(0) is an estimate of the signal at q=0.
This program is a simple interface to the program modelfit. The
modelfit program provides more options for fitting the diffusion
coefficient or tensor.
If the first command line argument is a hyphen (i.e. "-") the program reads data from
the standard input.
EXAMPLES
Fit the apparent diffusion coefficient to the data in SubjectA.Bfloat
using linear regression to the log measurements:
adcfit SubjectA.Bfloat A.scheme > ADC_A.Bdouble
Equivalently:
cat SubjectA.Bfloat | adcfit - A.scheme > ADC_A.Bdouble
or
modelfit -inversion -1 -schemefile A.scheme < SubjectA.Bfloat > ADC_A.Bdouble
AUTHORS
Daniel Alexander <camino@cs.ucl.ac.uk>
SEE ALSO
modelfit(1), dtfit(1), twotenfit(1), threetenfit(1), fa(1), trd(1),
shfit(1), shanis(1)
BUGS
Index
- NAME
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- SYNOPSIS
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- DESCRIPTION
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- EXAMPLES
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- AUTHORS
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- SEE ALSO
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- BUGS
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