geabr_0.dat 			       "data file name
geabr_0.img			       "sample image file
64                                     "number of channels
17.76                                  "A/D sampling rate
3.3333                                 "transducer center frequency
0                                      "block offset (in Kbytes)
10.0				       "time offset (in usec)
4096                                   "number of samples per record
2				       "number of bytes per sample
1				       "signal average
0.2413                                 "element space in mm
1.500 				       "velocity of sound (mm/usec)