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Table 1 Acquisition parameters of the 2D and 4D flow scans

From: Doppler ultrasound cardiac gating of intracranial flow at 7T

  2D Flow M1Ra 2D Flow CAb 4D Flow CoWc
Scan duration (min:s) 1:08–1:51 1:40–3:04 4:34–7:27
Heart rate (median) 50–72 (66) 50–79 (66) 51–84 (65)
Resolution (mm × mm) 0.5 × 0.5 0.3 × 0.3 0.7 × 0.7
Slice thickness (mm) 5.0 5.0 0.7
Time frames (median) 14–20 (17) 13–20 (20) 6–10 (7)
FOV (mm × mm) 200 × 220 200 × 220 180 × 180 × 21
TR (ms) 10 10 5.6
TE (ms) 2.8 4.3 2.8
α (°) 5 5 8
BW (Hz/pixel) 405 403 404
Turbofactor 2–3 2–3 6
SENSE 2.0 2.0 3.5
Temporal resolution (ms) 40–60 40–80 130–140
venc (cm/s) 150 15 150
  1. aRight M1 branch of the middle cerebral artery (MCA)
  2. bCerebral aqueduct
  3. cCircle of Willis