Magnetic resonance imaging apparatus and magnetic resonance imaging method of controlling contrast by applying radio frequency intermediate pulse

摘要

A magnetic resonance imaging apparatus includes a data acquisition unit and an image data generating unit. The data acquisition unit acquires MR signals for imaging by an imaging scan with a frequency-selective or slice-selective radio frequency intermediate pulse for controlling a contrast and a spoiler gradient magnetic field for suppressing unnecessary signal component after applying at least one of radio frequency excitation pulses. The image data generating unit generates image data based on the magnetic resonance signals.

主权项

1. A magnetic resonance imaging apparatus comprising:
a data acquisition unit configured to perform an imaging scan based on a Fast Spin Echo sequence, the imaging scan including:
applying at least one radio frequency excitation pulse for acquiring magnetic resonance signals; for controlling a contrast, applying one or more frequency-selective or slice-selective radio frequency intermediate pulses after applying the radio frequency excitation pulse, wherein each of the one or more frequency-selective radio frequency intermediate pulse is a radio frequency pulse applied to a matter having a resonance frequency different from that of NMR signals acquired for imaging and each of the one or more slice-selective radio frequency intermediate pulse is a radio frequency pulse applied in a slice different from an imaging slice; for suppressing a signal component, applying a spoiler gradient magnetic field subsequent to each of the radio frequency intermediate pulse; and acquiring the magnetic resonance signals for imaging after applying the spoiler gradient magnetic field; and an image data generating unit configured to generate image data based on the magnetic resonance signals.