Build 446 is released.

 1. Minimum Spanning Tree algorithm update with keypoint re-arrangement in the order of the Tree width-first traverse.

2. FLEXR: developed a multipass version of this algorithm running on 1/3 of RAM.  Multipass allows to start minimum spanning tree from several distant positions to compensate for tree approximation.

3. NW flow field generation:  provided an AVX256 implementation for x2 speedup.

4. NW flow Sparse-to-Dense:  implemented algorithm for filtering out remote keypoints for speedup. This was based on evaluating Y-Z exponents and introdducing some minor artefacts.

5. Volume-to-concentration conversion: fixed defect when VOID voxels were treated as regular ones calculating an infinite concentration as a result.

6. Completely re-engineered sparse-to-dense flow field generation for upto x20 speed up (on CT Lung 5 mm grid)

7. Workflow>Breaset MR BPE : implemented Whole Breast Segmentation function

8. File>DICOM>Dicom Tree to Folders   : fixed defect when composite SERIES were not able to convert to folder.

9. VA_VolSegHist:  fixed defect. This function was returning thresholds measured in Histogram bins. Corrected to signal.

10.  Workflow>BPE breast :  added a one-click function for FGT segmentation.

11.  Workflow>BPE breast: added function for 3D motion correction.

12, MainMenu>Dynamic Analysis:   enabled work without supplying the T1-map so only T1W conversion is enabled.

13. Simplified the FLEXR 3D/MC menues.