ARTERIAL SPIN LABELING WITH REDUCED ACOUSTIC NOISE EMISSIONS AND METHOD OF OPERATION THEREOF

摘要

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; a cquire 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 sinusoida l gradient waveform results in less acoustic noise during execution of the pulse sequence.