getmask

getmask-methods

getmask,ANY-method

getmask,dtiData-method

getmask,array-method

Create a mask containing voxel inside the head

 methods 

Diffusion Weighted Imaging (DWI) is a Magnetic Resonance Imaging
modality, that measures diffusion of water in tissues like the human
brain. The package contains R-functions to process diffusion-weighted
data. The functionality includes diffusion tensor imaging (DTI),
diffusion kurtosis imaging (DKI), modeling for high angular resolution
diffusion weighted imaging (HARDI) using Q-ball-reconstruction and
tensor mixture models, several methods for structural adaptive
smoothing including POAS and msPOAS, and a streamline fiber tracking
for tensor and tensor mixture models.
The package provides functionality to manipulate and visualize results
in 2D and 3D.

Karsten Tabelow

Analysis of Diffusion Weighted Imaging (DWI) Data

Joerg Polzehl

Felix Anker

getmask-methods function

<dl> <dt>object</dt>
<dd>an object of class <code>"dtiData"</code></dd> <dt>level</dt>
<dd>S0 intensity value to be used to discriminate between
 voxel inside and outside the brain. A good value of level may be determined
 using method <code>sdpar</code> in advance.</dd> <dt>prop</dt>
<dd>proportion of voxel in test area with s0 value larger than level
 needed to decide for a voxel inside the brain</dd> <dt>size</dt>
<dd>size of a cube defining a test area</dd></dl>

Arguments

<dl> <dt>obj = "ANY"</dt>
<dd>Returns a warning</dd>
 <dt>obj = "dtiData"</dt>
<dd>Create a mask containing voxel inside the head</dd>
 <dt>obj = "array"</dt>
<dd>Create a mask containing voxel inside the head</dd>
</dl>

Methods

Karsten Tabelow <a href="/link/tabelow%40wias-berlin.de?package=dti&version=1.5.4" data-mini-rdoc="dti::tabelow@wias-berlin.de">tabelow@wias-berlin.de</a> 
 J\"org Polzehl <a href="/link/polzehl%40wias-berlin.de?package=dti&version=1.5.4" data-mini-rdoc="dti::polzehl@wias-berlin.de">polzehl@wias-berlin.de</a>

Author

Methods for Function `getmask' in Package `dti' — getmask-methods

<dl>

 <dt>object</dt>
<dd>an object of class <code>"dtiData"</code></dd>

 <dt>level</dt>
<dd>S0 intensity value to be used to discriminate between
 voxel inside and outside the brain. A good value of level may be determined
 using method <code>sdpar</code> in advance.</dd>

 <dt>prop</dt>
<dd>proportion of voxel in test area with s0 value larger than level
 needed to decide for a voxel inside the brain</dd>

 <dt>size</dt>
<dd>size of a cube defining a test area</dd>

</dl>

<dl>

 <dt>obj = "ANY"</dt>
<dd>Returns a warning</dd>


 <dt>obj = "dtiData"</dt>
<dd>Create a mask containing voxel inside the head</dd>


 <dt>obj = "array"</dt>
<dd>Create a mask containing voxel inside the head</dd>


</dl>

Karsten Tabelow <a href='mailto:tabelow@wias-berlin.de'>tabelow@wias-berlin.de</a> 
 J\"org Polzehl <a href='mailto:polzehl@wias-berlin.de'>polzehl@wias-berlin.de</a>

getmask-methods: Methods for Function `getmask' in Package `dti'

Description

Usage

Value

Arguments

Methods

Author

See Also