Click here to start download

Click here to see version-to-version difference

To install

double click on COBRA_Exxim_v_xxxx.exe to start the setup ("xxxx" stands for particular version). The process can be executed with or without preliminary saving COBRA_Exxim_v_xxxx.exe on the user's PC. 

Every time you re-install COBRA please remove the old version from your computer. Please use conventional instruments to do that (e.g. Add/Remove Programs in Control Panel)

To try COBRA using one of our data sets:

• Download our artificial phantom data ( 6.5 MB ),  mouse data set ( 45 MB ), or/and pig dataset (12 MB)

• Double click on the downloaded file(s) to start the Setup process

• Run COBRA_Exxim.exe

• Open the file parameter_512_std.xxm (for reconstruction into 512^3 cube) or the file parameter_256_std.xxm (256^3 cube) and press the Perform Reconstruction button

• Make sure that reconstruction process has been started. You should see the message "Auto detected scale factor ~= 1400" in the Messages tab. The actual value depends on object and chosen preprocessing procedure. A reasonable range is 500-2000.

• Check the output slices using our viewer COBRA_View_Exxim.exe (Note: the reconstruction of the Sphere phantom contains three small spheres, so some of the slices will appear blank).

To try SAMARA in a single-slice mode:  

• download scanned dead pig and un-zip it

• load parameter_512.xxm

• reconstruct the volume 

• load parameter_512_samara.xxm

• start SAMARA Tuning Dialog

Projection converter   

  Supported:   

• Converting from big endian and float data formats

• Header handling

• Rotating, resizing, cropping

Test Data Sets    

Artificial phantom. Pure math model imitating absorption by ideal line integral. The phantom comprises three balls (DC value = const) in vacuum (DC value = 0). Contains 95 projections 512x512 each.

Real biological object : scanned mouse. The dataset contains the scan of a mouse. The number of projections is 195, the resolution is  512x256, pitch size = 0.162 mm. 

Real biological object : scanned dead pig. The dataset contains the scan of a dead pig (ribs area with metal screws). The number of projections is 100, the resolution is  512x512, pitch size = 0.44 mm. 

  COBRA: Differences between  

  trial and full versions

• The Trial version supports the full functionality of COBRA, performing off-line reconstruction on one PC.

• For educational purposes the SDK documentation is included into the trial version (API calls in demo mode will be rejected).

• The trial version does not support distributed (cluster) mode.

• SAMARA is not available

• Geo Calibration Utility is not available

• All dumped slices contain the word "Exxim" 

COBRA: Hardware Requirements 

Please see the specifications of the program on this site or download the User Manual.

The GPU option requires nVidia GeForce 8800GTX

graphics card.