Determination of peak velocity in stenotic areas: echocardiography versus k-t SENSE accelerated MR Fourier velocity encoding.
The study was approved by the local ethical committees, and informed consent from each participant was obtained. The purpose of the study was to compare accelerated magnetic resonance (MR) Fourier velocity encoding (FVE), MR phase-contrast velocity mapping, and echocardiography with respect to peak velocity determination in vascular or valvular stenoses. FVE data collection was accelerated by using the k-space and time sensitivity encoding, or k-t SENSE, technique. Peak velocities were evaluated in five healthy volunteers (one woman, four men; mean age, 28 years; range, 23-34 years), three patients with stenotic aortic valves (two women, one man; mean age, 67 years; range, 39-82 years), two patients with pulmonary valvular stenosis (a 14-year-old girl and a 36-year-old man), and two patients with aortic stenosis (two women aged 18 and 27 years). In volunteers, peak velocity determined by the different methods agreed well. In patients, similar peak velocities were obtained by using accelerated MR FVE and echocardiography, while phase-contrast MR imaging results tended to underestimate these values.
Baltes
Christof
C
Institute for Biomedical Engineering, University and Swiss Federal Institute of Technology Zurich, Wolfgang-Pauli-Str 10, CH-8093 Zurich, Switzerland. baltes@biomed.ee.ethz.ch
Hansen
Michael S
MS
Tsao
Jeffrey
J
Kozerke
Sebastian
S
Rezavi
Reza
R
Pedersen
Erik M
EM
Boesiger
Peter
P
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001013:Aorta, Thoracic; D001024:Aortic Valve Stenosis / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D001157:Arterial Occlusive Diseases / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D001783:Blood Flow Velocity; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D011666:Pulmonary Valve Stenosis / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D014463:Ultrasonography