Implementing the Sokoloff model with simple fitting by gridding+Amoeba....

FireVoxel Build 127 is released.

• Developed  the PET Workflow Quick Start manual.
• Produced the initial result for the Image Derived Input Function. 
• Implemented Vt (Logan) plot parametric model based on the newly available technology for the Image Derived Input Function from Carotid Artery.
• Corrected the defects that came up during the presentation to Fernando.  These two bugs are intermittent and are hard to reproduce.
• Implementing a new version of the "Blood Vessel Finder" dialog based on the initial discussions.
• Finalized 2nd generation of the IDIF (Image Derived Input Function) dialog. Principal addition is the introduction of L2-based measure for checking TAC similarity.  However, L2-smoothing was introduced in a way so blurring of the TAC is avoided.
• Extending the IDIF functionality so several seeds can be specified covering branches of the Carotid Artery to create larger ROI and thus more reliable Input Function. Since the IDIF function is very fast this is done simply by calling procedure several time and OR-ing corresponding ROIs to create the final one.
• Documented the latest version of the semi-automatic IDIF tool.
• Fixed the "Missing time information in save .IM file"  reported by Dr. Rusinek.  This was due to the time written in "absolute value" and using the scientific notation some important lower digits were truncated.  Switched to the regular "double float" format by using %lf option in fprintf().
• Fixed parametric map-related defect:  when  RoiStat3D  dialog display statistics, the VOID voxels are included into the calculation.  They should be excluded.
• Simplified the "Real Volume to Integer conversion" menu item to perform conventional rounding with the truncation to the specified bit length.'