#define NIFTI_UNITS_UNKNOWN 0 /! NIFTI code for unspecified units. /

			    / Space codes are multiples of 1. / 

#define NIFTI_UNITS_METER 1 /! NIFTI code for meters. / 
#define NIFTI_UNITS_MM 2 /! NIFTI code for millimeters. / 
#define NIFTI_UNITS_MICRON 3 /! NIFTI code for micrometers. /

			   / Time codes are multiples of 8. / 
#define NIFTI_UNITS_SEC 8 /! NIFTI code for seconds. / 
#define NIFTI_UNITS_MSEC 16 /! NIFTI code for milliseconds. / 
#define NIFTI_UNITS_USEC 24 /! NIFTI code for microseconds. /

			 /* These units are for spectral data: / 
#define NIFTI_UNITS_HZ 32 /! NIFTI code for Hertz. / 
#define NIFTI_UNITS_PPM 40 /! NIFTI code for ppm. / 
#define NIFTI_UNITS_RADS 48 /! NIFTI code for radians per second. */ 
