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Sunday, April 19, 2015

Implemented context-memory system for saving and loading RAW files so the previously used Folder, extension and File Filter Index would be used.  Settings are saved and loaded to User Options file so they are preserved between FireVoxel sessions.

Friday, April 17, 2015

Implemented the CT-brain trauma batch workflow processing parameters  "Min-Max Number of slices required.
Fully parallelized the "Threshold to ROI" function. This was done in context of testing EdgeWave which contains the "Threshold to ROI".

Thursday, April 16, 2015

Wednesday, April 15, 2015

T1-mapping crash reported on 04/14/2015 is working in Build 179.  I entered the offset  "-4096" in the modelling dialog.
Initial alignment of breast data, using DICOM tags only
PET over MR

EPI over MR
FireVoxel Build 179 is released.

Tuesday, April 14, 2015

WM FLAIR lesions segmentation algorithm: corrected an uninitialized memory error that was resulting in intermittent crash during the execution.
Completely re-engineered internal design of Input Functions in the Dynamic Experiment module.  Remove redundant representation of IFs in the DEMP and FireVoxel modules.
Fixed the defect when the IF was not properly loaded after the IDIF procedure.

Sunday, April 12, 2015

Moved the TempDir option to under   "User Options".   Exposed TempDir under "User Options" dialog.
Removed "Main Menu>File>Set Working Directory" menu item.
Added "Applications>CERENE3D  menu item
Added   "Applications>CERENE3D>Arterial Input function" menu item and parameters specific to CERENE3D workflow.

Thursday, April 9, 2015

Improved and corrected a rare defect in the automatic function for determining the required precision of variables for Cost function used in Amoeba optimization.  Some cost functions were producing an infinite loop along some "degenerated" variables.

Wednesday, April 8, 2015

Implemented fully automatic Cortex-Medulla segmentation from registered 4D kidney.
Notice how accurately collecting system is excluded

Ensemble 4D registration substantially outperforms the "Radial" and "Serial" methods (on kidney 4D FLASH data)

Kidney Mask on the base (anchor) timepoitn

Pre-contrast timepoint registered using Radial

Pre-contrast timepoint registered using Ensemble

Tuesday, April 7, 2015

Fixed a major FireVoxel-wide DICOM error.  When encountering the DICOM tag of VR_TM type, the .Fractions (=microseconds) field was incorrectly converted to string when the number of digits in .Fractions was <6.  Fix was to pad the Fractions with 0s to contain 6 digits corresponding to microseconds.  This might have affected all the 4D volumes.

Monday, April 6, 2015

Improved and simplified the "Load Siblings with Descendants" function of the DICOM dialog.
If composite series are detected, user is asked if the composite series have to be included.
Button name is simplified to "Load Siblings".
Fixed the "DICOM subtree copy" defect.  When several series of the 4D study have identical filename in the original subfolders (very unusual situation), the copy function would fail by blindly overwriting them.  Fixed now by creating individual subfolders.
Confusing DICOM situation in Renal FLASH 4D:
Relevant DYNAMIC series seem to be present TWICE.  First  RENAL_PERF_DYN (outlined in RED 22 timepoints),  second time COMP_RENAL_PERF  (outlined in BLUE another timepoints).
Actual times are identical between those series, so this confuses FireVoxel when trying to load the with the simple "Load siblings".  Workarounds are possible presently (either by checking only required series, or just by "Load Range" for COMP_RENAL_PERF).

But which one should be used?   First one RENAL_PERF_DYN can be combined with RENAL_PERF_5_MEASURES  making a longer dynamic dataset of 27 timepoints.

Should anything be done about this now?

Wednesday, March 25, 2015

Hyperspectral image (2D+Spectral dimension) was loaded.
Entire spectrum for each pixel was considered as a "Spectrum Curve".

Original image and a representative spectrum for the specified pixel

Entire population of pixels was clustered (using fixed number of cluster=7) so that all the Curves within cluster are similar to each other and different between clusters.
labeled map of clusters (7 clusters = 7 colors)



Each cluster corresponds to a distinct spectrum.  7 clusters were chosen because at 8 clusters the corresponding spectrum curves became less distinct.
Fragment of the original map

Corresponding fragment of the labeled map


RoiStat4D dialog box:  fixed the "inifinite loop while editing the value" issue.