Validation of Doppler ultrasound and magnetic resonance imaging velocity measurements by means of a test object
article
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.
Topics
TNO Identifier
233488
ISSN
09298266
Source
European Journal of Ultrasound, 4(2), pp. 135-143.
Pages
135-143
Files
To receive the publication files, please send an e-mail request to TNO Repository.