Magnetic resonance imaging device and control method thereof
AssigneesSamsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology
InventorsHyun Wook PARK, Ye Ji HAN, Jae Moon JO
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Abstract
An MRI apparatus performs an MRI while moving a patient table and includes a main magnet configured to generate a static magnetic field in a bore; a gradient coil assembly configured to apply a gradient signal to the static magnetic field to generate a magnetic field gradient; an RF coil assembly configured to apply an RF excitation signal and an RF refocusing signal; and a controller configured to control the RF refocusing signal so that a slice to which the RF refocusing signal is to be applied conforms to the slice to which the RF excitation signal has been applied.
Claims25
A magnetic resonance imaging (MRI) apparatus to perform MRI while moving a patient table, the MRI apparatus comprising:
- a main magnet configured to generate a static magnetic field in a bore;
- a gradient coil assembly configured to apply a gradient signal to the static magnetic field to generate a magnetic field gradient;
- a radio frequency (RF) coil assembly configured to apply an RF excitation signal and an RF refocusing signal;
- and
- a controller configured to control the RF coil assembly so that a slice to which the RF refocusing signal is to be applied conforms to the slice to which the RF excitation signal has been applied.
A control method of a magnetic resonance imaging (MRI) apparatus to perform MRI while moving a patient table, the control method comprising:
- generating a static magnetic field in a bore;
- applying a gradient signal to the static magnetic field to generate a first magnetic field gradient;
- applying a radio frequency (RF) excitation signal to select a slice;
- and
- applying an RF refocusing signal having a center frequency shifted by an offset from a center frequency of the RF excitation signal based on a movement distance of the patient table.
A magnetic resonance imaging (MRI) apparatus comprising:
- a main magnet configured to generate a static magnetic field in a bore of an MRI scanner;
- a gradient coil assembly configured to form a magnetic field gradient in the bore;
- a radio frequency (RF) coil assembly configured to apply an RF excitation signal to a first slice at a first spatial position in the bore and to apply an RF refocusing signal after a time delay;
- and
- a processor programmed to control the RF coil assembly so that the RF refocusing signal is applied to a same first slice positioned at a second spatial position in the bore, which differs from the first spatial position according to a movement distance of a patient table in the bore.
Dependencies are inferred from the claim text.