This International Standard specifies parameters for a flow Doppler test object representing a blood vessel of known diameter at a certain depth in human tissue, carrying a steady flow. This International Standard establishes a flow Doppler test object which can be used to assess various aspects of the performance of Doppler diagnostics equipment.
DS/EN 61685:2002 history
2002DS/EN 61685:2002 Ultrasonics - Flow measurement systems - Flow test object