Content-type: text/html
Manpage of trd
trd
Section: User Commands (1)
Index
Return to Main Contents
NAME
md - Computes the mean diffusivity (trace/3) from diffusion tensors.
SYNOPSIS
md
[-inputmodel <dt|twotensor|threetensor|multitensor>]
DESCRIPTION
Reads diffusion tensor (single, two-tensor or three-tensor) data from
the standard input, computes the mean diffusivity, ie trace/3, of each
tensor and outputs the results to the standard output. For
multiple-tensor data the program outputs the mean diffusivity of each
tensor, so for three-tensor data, for example, the output contains
three values per voxel.
EXAMPLES
Compute MD in each voxel of diffusion MRI data set SubjectA.Bfloat
and store the output in MD_A.Bdouble:
dtfit SubjectA.Bfloat test/A.scheme | md > MD_A.Bdouble
Compute MD for each component of the two-tensor fit to the same
data set:
twotenfit SubjectA.Bfloat test/A.scheme | md -inputmodel twotensor > MD_A.Bdouble
Compute MD for 10000 independent trials of fitting the diffusion
tensor to data synthesized from test function 1 (see datasynth(1))
using imaging scheme A.scheme and assuming signal to noise ratio of 16
at b=0:
datasynth -testfunc 1 -voxels 10000 -snr 16 -schemefile A.scheme | dtfit - A.scheme | md > MD_A_SNR16.Bdouble
OPTIONS
- -inputmodel <model type>
-
Specifies the model that the input data contains parameters for.
Possible model types are: "dt" (diffusion-tensor data), "twotensor"
(two-tensor data), "threetensor" (three-tensor data). By default, the
program assumes that the input data contains a single diffusion tensor
in each voxel.
- -inputdatatype <data type of input>
-
Specifies the data type of the input file. The data type can be any
of the following strings: "char", "short", "int", "long", "float" or
"double".
- -outputdatatype <data type of output>
-
Specifies the data type of the output data. The data type can be any
of the following strings: "char", "short", "int", "long", "float" or
"double". See camino(1).
AUTHORS
Daniel Alexander <camino@cs.ucl.ac.uk>
SEE ALSO
trd(1), fa(1), dtpds(1), dtfit(1), twotenfit(1), threetenfit(1), modelfit(1).
BUGS
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- EXAMPLES
-
- OPTIONS
-
- AUTHORS
-
- SEE ALSO
-
- BUGS
-
This document was created by
man2html,
using the manual pages.
Time: 02:06:54 GMT, December 10, 2011