Phantom no: 529, model 525

11. January 2000

Slice thickness: 3.01 cm +/-0.02cm

Temperature:18.8 degree Celsius +/-0.1°C

Sampling frequency for velocity measurement: 1000.00Ms/sec +/-0.01%

frequency, time differens in mysek, sound speed in phantom, +/- 2*SD

3.0, -0.770, 1537.2, 0.5

4.0, -0.780, 1538.0, 0.5

5.0, -0.780, 1538.0, 0.5

6.0, -0.780, 1538.0, 0.5

7.0, -0.790, 1538.7, 0.5

8.0, -0.790, 1538.7, 0.5

9.0, -0.790, 1538.7, 0.5

10.0, -0.790, 1538.7, 0.5

Mean velocity: 1538.2 m/sec

Calculated velocity at 23øC : 1550 m/sec

Measurement of attenuation:

Sampling frequency for attenuation measurement: 100.00Ms/sec +/-0.01%

Density: 1055.0 Kg/m3

Impedance: 1.623 * 10E6 Kg/m2*sec

Reflection loss: -0.02 dB

trans.frq.,energy,rec.frq.,energy,transm.loss,att/dist,att/dist*frq,+/-2*SD

3.08, 69.19, 3.08, 64.61, 4.58 1.515, 0.493, 0.031

4.15, 73.53, 4.15, 67.09, 6.44 2.134, 0.514, 0.024

5.13, 74.22, 5.13, 66.41, 7.81 2.590, 0.505, 0.020

6.10, 70.25, 6.10, 60.92, 9.33 3.093, 0.507, 0.017

7.13, 65.81, 7.13, 54.96, 10.85 3.598, 0.505, 0.015

8.06, 60.70, 8.01, 48.46, 12.24 4.059, 0.504, 0.014

8.98, 54.94, 8.98, 41.18, 13.77 4.567, 0.508, 0.013

9.96, 48.73, 9.96, 33.65, 15.09 5.006, 0.503, 0.012