Blood-Flow Volume Quantification in Internal Carotid and Vertebral Arteries: Comparison of 3 Different Ultrasound Techniques with Phase-Contrast MR Imaging
S.O. Oktara,
C. Yücela,
D. Karaosmanoglua,
K. Akkana,
H. Ozdemira,
N. Tokgoza and
T. Talia
a From the Department of Radiology, School of Medicine, Gazi University, Besevler, Ankara, Turkey
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Fig 1. A, Flow volume measurement of internal carotid artery by different sonographic techniques and MR phase-contrast imaging in a healthy 29-year-old man. With CDI, the vessel diameter at the area of interest was measured as 0.46 mm and the flow volume was calculated as 294.99 mL/min.
B, The flow volume measurement with PDI from the same segment as panel A. The vessel diameter was measured as 0.48 mm and blood-flow volume was calculated as 317.92 mL/min.
C, The flow volume measurement obtained with BFI revealed the lowest values. The vessel diameter was measured as 0.45 mm and blood-flow volume was calculated as 260.56 mL/min.
D, MR phase-contrast flow quantification (TR/TE, 29/7.7) of the same internal carotid artery revealed a blood-flow volume of 246.9 mL/min.
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Fig 2. A, Flow volume measurement of left vertebral artery by different sonographic techniques and MR phase-contrast imaging in a 29-year-old subject. With CDI the vessel diameter was measured as 0.35 mm and the flow volume was calculated as 135.70 mL/min.
B, With PDI, the vessel diameter was measured as 0.37 mm and the flow volume was calculated as 137.40 mL/min.
C, With B-flow imaging the vessel diameter was measured as 0.29 mm and the flow volume was calculated as 90.77 mL/min.
D, MR phase-contrast flow quantification (TR/TE, 29/7.7) of the same vertebral artery revealed a blood-flow volume of 77.0 mL/min.
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Fig 3. A, Graphs show correlations between sonographic and MR phase-contrast volume measurement values for internal carotid arteries. Most of flow measurements are near the line of equality indicating that BFI provides similar blood volume estimates with MR phase-contrast quantification (BFBV = blood-flow volume obtained with B-flow; MRBV = blood-flow volume obtained with MR phase-contrast imaging).
B, Correlation between flow volume measurements of internal carotid arteries obtained with CDI versus MR phase-contrast imaging is shown as scatter plot (CDBV = blood-flow volume obtained with color Doppler).
C, Correlation between flow volume measurements of internal carotid arteries obtained with PDI versus MR phase-contrast imaging is shown as scatter plot. (PDBV = blood-flow volume obtained with power Doppler).
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Fig 4. A, Graphs show correlations between sonographic and MR phase-contrast volume measurement values for vertebral arteries. Most of volume measurements are near the line of equality indicating that BFI provides similar blood volume estimates with MR phase-contrast quantification.
B, Correlation between measurements of vertebral arteries obtained with CDI versus MR phase-contrast imaging is shown as scatter plot.
C, Correlation between flow volume measurements of vertebral arteries obtained with PDI versus MR phase-contrast imaging is shown as scatter plot.
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