Updated pettb.pl to accomandate nonstandard frame durations.
Updated petpreproc to use the -n option for dcm_pet in order to account for incorrect frame information in dcm header.
Initial commit of matlab 4dfp code
Added single frame data analysis capability, also some bug fixes.
Added matlab code for IDAIF processing.
IDAIF processing scripts
Merge github.com:ysu001/PUP