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
Instruments
Doppler study
Doppler test object
Doppler velocity measurement
Magnetic Resonance Imaging (MRI)
MRI velocity measurement
Ultrasound (US)
Blood flow velocity
Controlled study
Doppler flowmetry
Nuclear 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