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Published on: March 6, 2019
Choice of moving target for a string phantom: II. On the performance testing of Doppler ultrasound systems
1Medical Physics Department, Royal Infirmary, Edinburgh, UK.
Abstract:
A string phantom was used to test a duplex system using several filaments: braided silk, nylon and O-ring rubber. The estimated pulsatility index was identical for all filaments tested. Range gate registration measurements were identical for all filaments tested. Maximum velocity was underestimated in the region of a strong angular backscatter peak; this was the case for several of the braided silk filaments. This effect was not observed for O-ring rubber. The paper concluded that O-ring rubber is a suitable filament for the testing of several key Doppler quantities. Recalibration of the string phantom velocity indicator is necessary due to the large diameter of the O-ring rubber.
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