CC BY-NC-ND 4.0 · Ultrasound Int Open 2018; 04(03): E79-E84
DOI: 10.1055/a-0637-2437
Original Article
Eigentümer und Copyright ©Georg Thieme Verlag KG 2018

Atherosclerotic Lesions in the Superficial Femoral Artery (SFA) Characterized with Velocity Ratios using Vector Velocity Ultrasound

Peter Møller Hansen
1   Department of Radiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
Kristoffer Lindskov Hansen
1   Department of Radiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
Mads Møller Pedersen
1   Department of Radiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
Theis Lange
2   Section of Biostatistics, University of Copenhagen, Copenhagen, Denmark
3   Center for Statistical Sciences, Peking University, Beijing, China
Lars Lönn
1   Department of Radiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
4   Department of Vascular Surgery, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
Jørgen Arendt Jensen
5   Center for Fast Ultrasound Imaging, Dept. of Elec. Eng., Technical University of Denmark, Lyngby, Denmark
Michael Bachmann Nielsen
1   Department of Radiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
› Author Affiliations
Further Information

Publication History

received 22 November 2017
revised 13 April 2018

accepted 12 May 2018

Publication Date:
18 September 2018 (online)


Purpose Atherosclerotic arteries are challenging to evaluate quantitatively using spectral Doppler ultrasound because of the turbulent flow conditions that occur in relation to the atherosclerotic stenoses. Vector velocity ultrasound is angle independent and provides flow information, which could potentially improve the diagnosis of arterial stenoses. The purpose of the study is to distinguish significant stenoses in the superficial femoral artery (> 50% diameter reduction) from non-significant stenoses based on velocity ratios derived from the commercially available vector velocity ultrasound technique Vector Flow Imaging (VFI).

Materials and Methods Velocity ratios (intrastenotic blood flow velocity divided by pre- or poststenotic velocity) from a total of 16 atherosclerotic stenoses and plaques in the superficial femoral artery of 11 patients were obtained using VFI. The stenosis degree, expressed as percentage diameter reduction of the artery, was determined from digital subtraction angiography and compared to the velocity ratios.

Results A velocity ratio of 2.5 was found to distinguish clinically relevant stenoses with>50% diameter reduction from clinically non-relevant stenoses with<50% diameter reduction and the difference was statistically significant.

Conclusion The study indicates that VFI is a potential future tool for the evaluation of arterial stenoses.

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