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. Note: the reconstruction of the Sphere phantom contains three small spheres, so some of the slices will appear blank).

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

• Slices (output volumetric data) contain a word EXXIM;

• Correction algorithms CFA and SAMARA are not available;

• When COBRA GUI is running in High-Definition visualization mode a user is observing semitransparent marks with Demo-Mode letters on a visualization screen

COBRA: Hardware Requirements 

Minimum.

Works only for small datasets (<400 all dimensions), typically provides slow reconstruction.

CPU:  2.0 GHz

Memory:  1 GB

Display resolution: 1680x1050 / 1600x1200

OS: Windows XP/Vista/Win7

Reasonable minimum.  

Works for average size datasets (<768 all dimensions), a reconstruction time for 512x512x512 views à 512x512x512 cube is about  ~ 3 min

CPU:  dual core 2.5 GHz

Memory: 2 GB

Display resolution: 1920x1200

OS: Windows XP/Win7

Recommended.

CPU:  quad core 2.5 GHz and higher

Memory: 4 GB

GPU: nVidia GeForce 200 series (ask Exxim about a particular model)

Display resolution: 1920x1200 and higher

OS: Windows XP/Win7 64-bit platform