MRE/Wave beta release General functions mrewave home data types reserved data input files output files clipboard resolution 1d plots 2d plots Wave inversion functions wave test data wave data wave parameters wave output wave unwrap wave filters wave lfe fftw faq known bugs |  |
Wave Inversion - Test Data
Located in the test_data directory are magnitude and phase difference data sets. It is a single slice data set with 8 phase offset, FOV=20cm, and 100hz driving frequency with 1 motion encoding gradient. The unsigned character data set has a resolution of 256 x 256 x 8. To open the data bring up the standard Windows File screen.
Enter: file type, resolution and data type (See data types) When the load screen comes up, There are several options for naming the data set. The default is to simply name the data after the filename. Also, Check 2d option to display the data. For loading in dicom images from multiple files, select all files in the open screen and open with "load in stack". After loading in data, these windows should be available. Select the "wave inversion" button on the tool bar. Enter file names and continue. Enter experiment parameters. An interactive mask tool lets you adjust the mask. NOTE output file names use a C format syntax. In the above example a window named mask_00 will be generated. This is the equivalent of the C format function sfprintf(,"mask_%02d", count) As a further example suppose: name = %s_mask%d base_name = phantom count = 6 This is equivalent to the C format function sprintf(,"%s_mask%d", "phantom", count) and will generate "phantom_mask6". The current data set does not need phase unwrapping or filtering so we continue to the output window. Selecting these outputs produce the interpolated wave propagation and the displacement map in mm. The first time mrewave executes, the FFTW routines perform a performance calibration. This calibration can take 10s of seconds. Subsequent calculation will skip this calibration and run much faster. Finally, generating the stiffness estimate. The values are in kilopascals (kPa) Bring up the window/level controls (ctrl L) View the color map with "vert color bar". With the mouse positioned over the calibration wedge, the bitmap can be copied with a right mouse click.

MRE/Wave beta release For future updates check: http://mayoresearch.mayo.edu/mayo/research/ehman_lab"