Cirs Doppler String Phantom 043, User Manual, Page: 4 / 32

1
OVERVIEW
Features of the Doppler String Phantom
The Doppler String phantom is a very accurate device for testing Doppler ultrasound scanners. It is especially
useful for checking sample volume registration, color registration, directional discrimination, and Doppler velocity
accuracy.
The Doppler String Phantom offers superior accuracy by using a string target that never changes (unlike sus-
pended scatterers in fluid flow phantoms) and a crystal-controlled motor. The motor speed is adjusted 1000
times per second, allowing realistic reproductions of human blood flow velocity patterns and a wide range of con-
stant velocities.
The Doppler String Phantom has been designed for ease of use. It can be set up quickly and easily with ordinary
tap water. It is simple to use and almost no maintenance is required. An RS-232 interface is also provided for
automated use, if desired. Ultrasound technologists, biomedical technicians, researchers and manufacturers all
rely on the Doppler String Phantom for hassle-free, reliable testing.
Starting a Quality Assurance Program
Each ultrasound lab will have different Quality Assurance (QA) needs depending on equipment, maintenance
agreements and applicable laws and policies. However, many technicians recommend performing QA tests
every 3 months. Of course, any time you suspect a problem with an ultrasound scanner, you will want to test it
immediately.
CIRS recommends using a standard form to record the results of your tests, so you can be sure that each testing
session is consistent and thorough. Recording your findings also provides written documentation of your QA
program. A sample QA form is provided in Appendix B of this User Guide.