Print Email Facebook Twitter Validation of Doppler ultrasound and magnetic resonance imaging velocity measurements by means of a test object Title Validation of Doppler ultrasound and magnetic resonance imaging velocity measurements by means of a test object Author van Oostayen, J.A. Bezemer, R.A. Wasser, M.N.J.M. Teirlinck, C.J.P.M. Instituut voor Gezondheidstechniek TNO Publication year 1996 Abstract Objective: To validate Doppler ultrasound and MRI mean velocity measurements in a test object in which mean velocities are known and can be chosen within a range of 10-100 cm/s in tubes of 4 and 8 mm. This validation was carried out to check the performance of a duplex Doppler ultrasound system that is used to determine volume blood flow in a clinical setting. Materials: Doppler sonographic and MRI measurements of mean velocity were performed in a flow Doppler test object, containing Tissue Mimicking Material, Vessel Mimicking Tubes and Blood Mimicking Fluid. Several measurements at different known mean velocities in 4 and 8 mm tubes were performed. Each Doppler velocity value consisted of two separate measurements. Results: Interexamination reproducibility of repeated Doppler measurements was good: differences between separate measurements were below 7% at velocities >30 cm/s and differences were maximally 3 cm/s at velocities <30 cm/s. In the 4 and 8 mm tubes, Doppler ultrasound mean velocity measurements did not differ from the known chosen value by more than 12%. The MRI measurements in the 4 mm tube did not yield consistent results because of poor resolution, while measurements in the 8 mm tube were consistent and correct within 13%. Conclusion: This study shows that Doppler mean velocity measurements can be performed accurately in a flow Doppler test object containing 4 and 8 mm tubes and MRI measurements can be carried out accurately in 8 mm tubes but not in 4 mm tubes with the current system. Subject InstrumentsDoppler studyDoppler test objectDoppler velocity measurementMagnetic Resonance Imaging (MRI)MRI velocity measurementUltrasound (US)Blood flow velocityControlled studyDoppler flowmetryNuclear magnetic resonance imaging To reference this document use: http://resolver.tudelft.nl/uuid:6fd98fe0-1eec-46c3-9bd7-bfcd5d2304e5 DOI https://doi.org/10.1016/0929-8266(95)00185-9 TNO identifier 233488 ISSN 0929-8266 Source European Journal of Ultrasound, 4 (2), 135-143 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.