NF EN 61206 : 1995

INTRODUCTION
SECTION 1: GENERAL
Clause
1.1 Scope
1.2 Normative references
1.3 Definitions
1.4 Symbols
SECTION 2: OVERALL TESTS OF COMPLETE SYSTEMS
2.1 General considerations
      2.1.1 Types of Doppler ultrasound systems
      2.1.2 Worst case conditions
2.2 Initial conditions
      2.2.1 Power supply
      2.2.2 Test frequency, general conditions
      2.2.3 Working distance
      2.2.4 Zero-signal noise level
2.3 Doppler frequency response
      2.3.1 Frequency response range
      2.3.2 Doppler frequency accuracy
      2.3.3 Large-signal performance
2.4 Spatial response
      2.4.1 Axial response
      2.4.2 Lateral response
2.5 Operating frequency
      2.5.1 Acoustical measurement
      2.5.2 Electrical measurement
2.6 Flow direction separation
      2.6.1 Channel separation
      2.6.2 Simultaneous flow
2.7 Response to Doppler spectrum
      2.7.1 Volume-flow circuits
      2.7.2 Maximum-frequency followers
SECTION 3: SPECIAL DOPPLER TEST OBJECTS
3.1 Doppler test objects
      3.1.1 String Doppler test object
      3.1.2 Band Doppler test object
      3.1.3 Disk Doppler test object
      3.1.4 Piston Doppler test object
      3.1.5 Small ball test object
      3.1.6 Flow Doppler test object
      3.1.7 Water tank (or gel block)
Annexes
A (informative) Description of continuous-wave Doppler
   ultrasound systems
B (informative) Rationale
C (informative) Bibliography
ZA (normative) Other international publications quoted in
   this standard with the references of the relevant
   European publications

Describes test methods for measuring the performance of continuous-wave ultrasonic Doppler velocimeters, flowmeters, or foetal heart detectors. Also describes special Doppler test objects for determining various performance properties of Doppler ultrasound systems.