From: Very different performance of the power Doppler modalities of several ultrasound machines ascertained by a microvessel flow phantom
Machine
2,000 μm vessel
1,000 μm vessel
150 μm vessel
A
4
2.22
11.1
B
0.005
0.06
0.11
C
1
0.56
1.68
D
Not detected
E
0.5
0.33