4D Processing

A new arrayed mode and associated data structure was added. The new mode is 4D Complex Arrayed mode which packs the data into a 4 dimension data matrix. 

It has its own ProcessType (PT) similar to the Generic 3D called Generic 4D. Once this mode has been set with the PT command, the AR command will automatically enter this mode when issued without arguments. The AR command with the argument "4" or "4D" will force the arrayed mode to start in the 4D Complex Arrayed mode. 

The FT and EM commands are now "array aware" of the 4D mode and the Acquisition Parameters Dialog box (available from the View menu) will display the parameters for all dimensions when there is a point count greater than 1 in the 4th dimension.

Truman Brown has supplied some CSI spectroscopy data which is a 4D data set (512 complex by 8 by 8 by 8) and an import filter for this data has been written and depends on the presence of two files: NAME.ddf and NAME.raw. The DDF file has the parameters in a specific format and the RAW file is the data points as 2 byte integers in big endian format.

This is a first pass at displaying 4D CSI data.  The tools developed for displaying chosen planes and slices of 3D data work similarly in the 4D mode. 

Last updated: 6/1/03