volume

PURPOSE

volume method - returns volume of ROI in mm

SYNOPSIS

function v = volume(obj)

DESCRIPTION

 volume method - returns volume of ROI in mm

 $Id$

CROSS-REFERENCE INFORMATION

This function calls:

native_space native_space method - returns native space of object
voxpts voxpts method - voxels within a box in given space
native_space native_space method - returns native space of object
voxpts voxpts method - returns 3xN ijk matrix in voxels
native_space native_space method - returns native space of object
voxpts voxpts method - returns 3xN ijk matrix in voxels
voxpts voxpts method - voxels within a sphere in given space

This function is called by:

mars_display_roi utility routines for display of ROIs in graphic window
marsbar Startup, callback and utility routine for Marsbar

SOURCE CODE

0001 function v = volume(obj)
0002 % volume method - returns volume of ROI in mm
0003 %
0004 % $Id$
0005 
0006 sp = native_space(obj);
0007 XYZ = voxpts(obj,sp);
0008 vox = sqrt(sum(sp.mat(1:3,1:3)'.^2));
0009 v = size(XYZ,2) * prod(vox);