A magnetic resonance imaging (MRI) system (100, 600) that generates information indicative of a fluid flow in accordance with a pseudo-continuous arterial spin labeling (pCASL) method. The MRI system may include at least one controller (104, 610) configured to generate a pseudo-continuous arterial spin labeling (pCASL) pulse sequence (200) including at least a first gradient (GR) pulse sequence (207) having a sinusoidal waveform including a plurality of cycles, and a second radio frequency (RF) pulse sequence (205) including a half-wave rectified sinusoidal waveform having a plurality of cycles and which is synchronous with the first GR pulse sequence； label at least part of the fluid flow in a labeling region during a labeling mode using the pCASL pulse sequence； acquire label and control image information of the fluid flow at an imaging region proximal to downstream of the labeling region； and/or generate image information in accordance with a difference of the acquired label and control image information. The sinusoidal gradient waveform results in less acoustic noise during execution of the pulse sequence.
