Magnetic resonance imaging apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
InventorMasaaki Umeda
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Abstract
According to a magnetic resonance imaging apparatus according to an embodiment, a Radio Frequency (RF) pulse applying unit applies to a subject a flip pulse for exciting spin of nuclei inside a subject body, and a flop pulse for refocusing the phase of the spin. A gradient magnetic-field applying unit applies a spoiler gradient magnetic field onto the subject after the flop pulse is applied, and applies a rewind gradient magnetic field before applying the flop pulse. A control unit executes a pulse sequence of controlling the gradient magnetic-field applying unit so as to keep each of the strengths of the spoiler gradient magnetic field and the rewind gradient magnetic field at respective predetermined values or higher with respect to each of a plurality of slice encodings.
Claims20
A magnetic resonance imaging apparatus comprising:
- a Radio Frequency (RF) pulse applying unit that applies to a subject a flip pulse for exciting spin of nuclei inside a subject body, and a flop pulse for refocusing the phase of the spin;
- a gradient magnetic-field applying unit that applies a spoiler gradient magnetic field onto the subject after the flop pulse is applied, and applies a rewind gradient magnetic field before applying the flop pulse;
- a control unit that executes a pulse sequence of controlling the gradient magnetic-field applying unit so as to keep each of strengths of the spoiler gradient magnetic field and the rewind gradient magnetic field equal to or higher than a predetermined value with respect to each of a plurality of slice encodings, when performing imaging by three-dimensional fast spin echo method;
- and
- an image reconstructing unit that reconstructs an image from magnetic resonance data collected by executing the pulse sequence.
Dependencies are inferred from the claim text.