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Table 1 Parameters used for protocol testing.

From: Sequence optimization to reduce velocity offsets in cardiovascular magnetic resonance volume flow quantification - A multi-vendor study

Parameter GE Signa Excite Philips Achieva Siemens Avanto
Reduction by regular protocol variation
Gradient speed on/off (flow opt.) default/regular normal/whisper
Partial Echo min (75%)/min full on (75%)/off asymmetry strong (77%)/off
Bandwidth (Hz/pix) 200, 250, 300, 350, 400
Venc (cm/s) 120, 150, 180, 200, 300
Slice Thickness (mm) 6, 7, 8, 9, 10
Exploratory measurements beyond the protocol
Delay Td (ms) - 0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0
Velocity encoding - symmetric/asymmetric
Slew rate (%) & amplitude (%) - - 20, 40, 60, 80, 100
  1. Protocol parameters used for protocol testing listed per scanner type. In bold the basic protocol setting.