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IEC TS 61895:1999
Current
The latest, up-to-date edition.
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Ultrasonics - Pulsed Doppler diagnostic systems - Test procedures to determine performance
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
English
08-10-1999
Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Symbols
5 Overall tests of complete systems
5.1 General considerations
5.1.1 Types of pulsed Doppler ultrasound
systems
5.1.2 Worst-case conditions
5.1.3 Doppler beam axes
5.1.4 Probe/target distance variation and
measurement
5.2 Initial conditions
5.2.1 Power supply
5.2.2 Target movement direction
5.2.3 Propagation medium
5.2.4 Penetration depth
5.2.5 Working depth
5.2.6 Focusing
5.2.7 Working Doppler angle
5.2.8 Wall-thump filter cut-off frequency
5.2.9 Transmitter output power
5.2.10 Working pulse repetition frequency (PRF)
5.2.11 Doppler (receiver) gain
5.2.12 Test frequency
5.2.13 Working sample volume length
5.2.14 Doppler signal power measurement
5.3 Zero signal noise level
5.4 Doppler frequency response
5.4.1 Frequency response range
5.4.2 Deviation from flat response
5.4.3 Large signal performance
5.5 Spatial response
5.5.1 Sample volume response
5.6 Sample volume position registration error
5.7 Beam position and orientation
5.8 Intrinsic broadening
5.9 Dead zone
5.10 Acoustic working frequency
5.11 Flow direction separation
5.12 Velocity estimation accuracy
5.13 Volume flow estimation accuracy
5.14 Maximum, mean, mode and median frequency
estimation accuracy
5.15 Velocity waveform indices estimation accuracy
6 Doppler test objects
6.1 Test objects
6.2 Electronic test object
Annex A (normative) Description of pulsed Doppler ultrasound
systems
A.1 - Single-channel system
A.2 - Multi-channel system
A.3 - Aliasing
A.4 - Duplex and triplex scanners
Bibliography
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