cyst4_a100.dat 			       "data file name
cyst4_a100.img			       "sample image file
128                                    "number of channels
13.8889                                "A/D sampling rate
3.5                                    "transducer center frequency
0                                      "block offset (in Kbytes)
52.488 				       "time offset (in usec)
2048                                   "number of samples per record
4				       "number of bytes per sample
100				       "signal average
0.22                                   "element space in mm
1.480 				       "velocity of sound (mm/usec)