AS/NZS 4966:2002

1 - AS/NZS 4966:2002 ULTRASONICS-PULSED DOPPLER DIAGNOSTIC SYSTEMS-TEST PROCEDURES TO DETERMINE PERFORMANCE
4 - PREFACE
5 - CONTENTS
7 - INTRODUCTION
9 - 1 Scope
9 - 2 Normative references
9 - 3 Definitions
9 - 3.1 6 dB spectral width
10 - 3.2 20 dB spectral width
10 - 3.3 acoustic working frequency
10 - 3.4 aliasing
10 - 3.5 baseline frequency shift
10 - 3.6 B-mode (brightness-modulated display)
10 - 3.7 clutter
10 - 3.8 dead zone
10 - 3.9 directional
10 - 3.10 direction resolving
11 - 3.11 Doppler angle
11 - 3.12 Doppler demodulator
11 - 3.13 Doppler frequency
11 - 3.14 Doppler output connector
11 - 3.15 Doppler output
11 - 3.16 Doppler spectrum
11 - 3.17 Doppler test object
11 - 3.18 Doppler ultrasound systems
11 - 3.19 duplex scanner
11 - 3.20 nominal Doppler beam direction axis
12 - 3.21 nominal first lateral Doppler beam axis
12 - 3.22 nominal second lateral Doppler beam axis
12 - 3.23 nominal sample volume length
12 - 3.24 non-directional
12 - 3.25 Nyquist limit frequency
12 - 3.26 observed velocity
12 - 3.27 output channel
12 - 3.28 output device
12 - 3.29 phase-quadrature demodulation
13 - 3.30 pulse repetition frequency (PRF)
13 - 3.31 range gate
13 - 3.32 reference signal
13 - 3.33 sample volume
13 - 3.34 scan plane
13 - 3.35 sonogram
13 - 3.36 spectral width
13 - 3.37 spectrum
13 - 3.38 string test object
13 - 3.39 system
14 - 3.40 target
14 - 3.41 target depth
14 - 3.42 triplex scanner
14 - 4 Symbols
14 - 5 Overall tests of complete systems
14 - 5.1 General considerations
14 - 5.1.1 Types of pulsed Doppler ultrasound systems
15 - 5.1.2 Worst-case conditions
16 - 5.1.3 Doppler beam axes
16 - 5.1.4 Probe/target distance variation and measurement
17 - 5.2 Initial conditions
17 - 5.2.1 Power supply
17 - 5.2.2 Target movement direction
17 - 5.2.3 Propagation medium
18 - 5.2.4 Penetration depth
18 - 5.2.5 Working depth
18 - 5.2.6 Focusing
18 - 5.2.7 Working Doppler angle
19 - 5.2.8 Wall-thump filter cut-off frequency
19 - 5.2.9 Transmitter output power
19 - 5.2.10 Working pulse repetition frequency (PRF)
19 - 5.2.11 Doppler (receiver) gain
19 - 5.2.12 Test frequency
19 - 5.2.13 Working sample volume length
19 - 5.2.14 Doppler signal power measurement
19 - 5.3 Zero signal noise level
20 - 5.4 Doppler frequency response
20 - 5.4.1 Frequency response range
20 - 5.4.2 Deviation from flat response
20 - 5.4.3 Large signal performance
21 - 5.5 Spatial response
21 - 5.5.1 Sample volume response
22 - 5.6 Sample volume position registration error
23 - 5.7 Beam position and orientation
24 - 5.8 Intrinsic broadening
24 - 5.9 Dead zone
24 - 5.10 Acoustic working frequency
24 - 5.11 Flow direction separation
24 - 5.12 Velocity estimation accuracy
24 - 5.13 Volume flow estimation accuracy
25 - 5.14 Maximum, mean, mode and median frequency estimation accuracy
27 - 5.15 Velocity waveform indices estimation accuracy
28 - 6 Doppler test objects
28 - 6.1 Test objects
28 - 6.2 Electronic test object
30 - Annex A - Description of pulsed Doppler ultrasound systems
30 - A.1 Single-channel system
31 - A.2 Multi-channel system
31 - A.3 Aliasing
31 - A.4 Duplex and triplex scanners
34 - Bibliography