Windows 7 64 bit full support 

nVidia Geforce 400 Series support 

Free DICOM viewer

Horizontal FOV improvement. More accurate weighting

(according to amount of rays coming through voxel) and FOV crop

Protrusion correction improvement when cropping is dynamic or big

Fixes:

GXM/GPU mode fixes . Missing slices when multipass in the middle and around poles (CPU still does not work properly)

GXM mode improvement. HB added

Fixes:

Obligatory DirectX run-time installation even when GPU mode is not used. Fixed.

Auto-scale (auto-water) mode crush when the volume contains more than 1024 slices. Fixed.  

Fixes:  

Incorrect offset file treatment in HB. Fixed.

Improvements: 

GPU-based forward projector (controlled by new tag PARTAG_FP_GPU)- 

CFA now is applied only to relevant voxels (vertical restrain)

Autowater is applied at the end to the whole volume

Fixes:  

GUI sometimes covers taskbar (fixed)

Show extra algorithm is causing blank slices in volumes with z=768 (fixed)

Dynamic collimation does not work when collimated window size varies during the scan (fixed)

Autowater does not work properly when almost no air in the volume (fixed)

Floating point projection preview does not work (fixed)

Improvements:

New functionality controlled by new tags  

PARTAG_UNIFSLICELOCATION . Unified slice location 

PARTAG_EXTRAFOVSLICE . Show slice areas beyond FOV in horizontal plane

PARTAG_DET_OFFSET_V_3XEXT. Explicit setup for detector offset in V for the side detector position in 3X mode

PARTAG_STACKEDVOLSEAMLOCATION, Where slice seam is, e.g. 5 means that overlap is 10 slices

New:

Graphical User Interface and User Manual (UM)

High definition visualization.

An advanced post-processing edge-preserving smoothing procedure controllable by the following tags       

PARTAG_POSTPROFACTOR (smoothing sigma factor),

PARTAG_POSTPROAPRTHRZ  (smoothing hrz aperture),

PARTAG_POSTPROAPRTVRT  (smoothing vrt aperture),

PARTAG_POSTPROMEDIANAPRT  (median aperture),     

PARTAG_POSTPROINTERCUBESIZE  (intermediate cube size)

See UM Part 2, section 7.6 for additional details.

Controlling pre-processing smoothing by separate introduced  tags       

PARTAG_PREPROSMOOTHFACTOR        (smoothing sigma factor)

PARTAG_PREPROSMOOTHAPRTHRZ      (smoothing hrz aperture),

PARTAG_PREPROSMOOTHAPRTVRT      (smoothing vrt aperture)

See UM Part 2, section 7.4 for additional details.

Ring Artifact Reduction post-processing procedure controlled by

PARTAG_DERINGON

See UM Part 2, Section  7.7  Ring Artifact Reduction for details.

Wider choice of filter kernels. See section UM Part 2, 7.2 for additional details.

Saving compressed DICOM slices

Improvement: 

Auto-scale volume calibration controlled by PARTAG_SLICE_AUTOWATER is improved

See UM Part 2, Section  6.23  Dynamic slice scale calibration (also called water adjustment) for details.

 Fixes:

- Gamma slice scale was applied incorrectly before.

- GPU reconstruction of slices bigger than 2048 is now supported

First official release of version 6. 

New functionality: COBRA V6 contains optional use of a graphics card accelerator: nVidia GeForce8800GTX

See User Manual to learn more.

Improvement:  Faster MAR

Improvement:  Supporting  MAR in multi-pass mode

Improvement:  Faster conventional (~30%) GPU-based reconstruction

Bug fix: In some modes version 6.3.5 does not support no-GPU reconstruction.Fixed

Bug fix: Forward Projector (a.k.a. reprojector) was accidentally compiled in debug mode. Fixed

Bug fix: SAR and MAR sometimes did not work simultaneously. Fixed

Bug fix: MAR and half-beam sometimes did not work simultaneously. Fixed

Improvements: 

Stacked volume mode. Stacked volume mode allows to stack several (from 2 to 12) cylindrical sub-volumes one on top of the other, thus increasing the effective detector size in V. Several scans must be performed and the object should be moved in vertical z-direction between the scans. See also section 6.18 of the user manual.

Dynamic slice scale calibration. We also call it water adjustment. Allows aligning density profiles automatically. Also compensates cupping and doming artifacts. Controlled by the tag PARTAG_SLICE_AUTOWATER. See also section 6.23 of the user manual.

Improvements: 

Treatment of value set by OPTTAG_3DBUFFERSIZE has been improved. This tag can be set to any value. Defines the desired size of used 3D reconstruction buffer (in MB). Also relevant for graphics card RAM (see section 6.8 of the user manual)

Utilization of multiple graphics processors (GPU).  New tag OPTTAG_ENGINEQTY.  The tag defines the number of GPU installed and used. See also section 6.8 of the user manual

New reconstruction mode called 3-x view has been introduced. In this mode every volume scan is a combinations of two 360-degrees scanner gantry (or rotational table) revolutions. The first revolution is being made with the detector in a standard central (relatively axis of rotation) position. The second revolution (might be done in opposite direction) is being made with the detector in offset position (see section 6.15 of the user manual). It allows expanding a field of view diameter by factor 3 (vs. standard detector central position)

New stacked volume algorithm is available; PARTAG_STACKEDVOLMODE has been introduced (see section 6.18). When is set to 1 then subvolumes are being adjusted by translation and rotation. When is set to 0 then only translation is being used in alignment process.

New advanced noise-reduction preprocessing filter option has been introduced. Controlled by the tag OPTTAG_VRTSMOOTH. See also section 8.4.2 of the user manual.

Reconstructed volume auto detect option. If the reconstructed volume is not defined by User (for example, in XXM file) then the automatic settings are applied. Automatically calculated output volume fits the reconstructed field of view; its resolution is ~30% less than the finest theoretical resolution defined by the detector pitch size.  See also section 6.22 of the user manual.

Shepp-Logan preprocessing filter has become a default option (instead of a ramp filter). This is a customers’ request.

Dynamic cropping mode. If the scanner hardware has an option to make a dynamic control of collimator blades then non-co-axial partial field of view can be reconstructed. Please contact Exxim (info@exxim-cc.com) for details.

Faster extended mode (Half-beam) reconstruction. Tag PARTAG_FASTEXTVIEW has been untroduced.  See also section 6.9.

Direct reconstruction of .CAT files. Please contact Exxim (info@exxim-cc.com) for details.

Exxim Computing Corporation (c) 2003-2010