SN EN 61206 : 1995

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