IEC TS 61895:1999

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

This technical specification describes: - test methods for measuring the performance of pulsed Doppler ultrasound systems; - Doppler test objects for carrying out these tests; and applies to - tests made on an overall pulsed Doppler ultrasound system, a system which is not disassembled or disconnected; - tests made on pulsed Doppler ultrasound systems whether they are stand-alone or as part of another ultrasound equipment.