You can download raw data resulting from QCC data processing for your own analysis. Distortion data and Study data are both available.

Downloading Distortion Data

Distortion data is stored in a Matlab-style text file. Included are measured and actual (original) position data for each sphere in the phantom, in units of mm from the scanner isocenter.  Also are included are original and measured sphere volumes in cubic mm.  

To acquire the data, go to the Study List that includes the scan you want the data for and click on the 'Get processing data' link.  

The sphere numbers correspond to specific physical spheres in the phantom.  

• This sphere numbering scheme was implemented in early April of 2011. Data acquired before April 2011 does not use a well defined numbering system.  A sphere-numbering map of the phantom in pdf format can be downloaded here.

Important Note!  Sphere #1 is the large 6cm diameter sphere at the center of the phantom.  It is mainly used to facilitate SNR calculations.  The sphere is not machined to the same tolerance as the smaller spheres and it has undergone a redesign for durability since the introduction of the phantom.  Therefore the distortion measurements for sphere #1 should be considered unreliable.  Also the 3cm contrast spheres, (numbers 162, 163, 164, and 165), have less reliable distortion measurements than the other spheres. Distortion results for all of these spheres are not included in study data, 3D, or scatter plots, with the exception that data processed before May of 2011 (and not re-processed) does include the 6cm sphere in the study data.

Here is a subset of downloadable distortion data:

Sphere 1 {
OriginalPos:8.8839032041 73.2343820449 14.4091520005
MeasuredPos:9.4152786546 74.9514023993 15.1809324718
OriginalVol:113097.3355292325
MeasuredVol:99257.4623167600
}
Sphere 2 {
OriginalPos:24.2756042137 70.4191857211 -43.5253134761
MeasuredPos:23.9526799257 70.5455542425 -42.7229808396
OriginalVol:1767.1458676443
MeasuredVol:1591.8046776400
}
Sphere 3 {
OriginalPos:94.8675922730 71.2612238162 37.3281098346
MeasuredPos:96.3725925307 71.5582172930 37.5795208624
OriginalVol:1767.1458676443
MeasuredVol:1649.9832788000
}
Sphere 4 {
OriginalPos:-6.5042704251 76.2574834534 72.3383725379
MeasuredPos:-6.4186193038 76.1456973904 71.7678370124
OriginalVol:523.5987755983
MeasuredVol:479.7350226800
}
Sphere 5 {
OriginalPos:-14.5946357971 77.1624231338 102.7684232768
MeasuredPos:-13.7541944859 76.9747594588 102.3432846130
OriginalVol:523.5987755983
MeasuredVol:484.5037604800
}
Sphere 6 {
OriginalPos:32.4065344591 71.9051545139 -74.0156810155
MeasuredPos:31.0357496295 71.6505688729 -72.6144012517
OriginalVol:523.5987755983
MeasuredVol:458.7525763600
}
Sphere 7 {
OriginalPos:30.1903477053 75.0984485428 51.0735814646
MeasuredPos:30.0283060792 75.0016589105 50.7881982220
OriginalVol:523.5987755983
MeasuredVol:477.8275275600
etc.

Downloading Study Data

Study data is available for download in a spreadsheet-friendly text format.  To acquire the data go to the Study List that includes the scan you want the data for and click on the 'Get study data' link.  A download link for the Study data is also available directly on the 'Phantom Scans' page.  Here is an example of downloadable study data:

"SNR","Max dist.","Mean dist 10%","Scaling","Non linearity","Raw phantom data","Number of spheres","Maximum dimness","Max distortion X","Max distortion Y","Max distortion Z","Mean dist 10% X","Mean dist 10% Y","Mean dist 10% Z"
"114.4661","6.912549","5.159177","1.010491","2.109273","4d9a05d6d98747_44509235_140_247_89_101_sphere","127","0.37108","1.219644","6.897436","2.455788","0.954615","5.109851","1.036846"