美國(guó)Gammex 142a LE多普勒模體超聲流體檢測(cè)系統(tǒng)產(chǎn)品規(guī)格：

仿人體結(jié)構(gòu)材料

聲速：1540 ±10 m/s

Attenuation：0.5 or 0.7 ±0.05 dB/cm/MHz

Targets

Cyst speed of sound：1540 ±10 m/s

Cyst attenuation：0.05 ±0.01 dB/cm/MHz

Diameter of nylon lines：0.1 mm (0.004 in)

Size tolerance：±5%

Location tolerance：±0.1 mm (0.004 in)

Vessels

Size：5 mm diameter

Location：2 cm below surface; 2 to 16 cm at 40°angle

Blood Mimicking Fluid

Density：1.03 g/cc

Speed of sound：1550 ±10 m/sec

Scatter size：4.7 micrometers average

Electronic Flow Control System

Constant flow mode：1 to 12.5 ml/sec ±3%

Calculated velocities：10-110 cm/sec

Pulsatile flow mode： 5 programmed waveforms

Container Size： 40.6 x 24.8 x 40 cm (16 x 9.75 x 15.75 in)

Weight： 10.4 kg (23 lbs)

All acoustic measurements at 4.5 MHz, 22°C