MRI apparatus and method for performing spatial selective saturation
AssigneeGE Medical Systems Global Technology Company, LLC
InventorMitsuharu Miyoshi
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Abstract
The present invention provides an MRI apparatus with selective saturation without affection to the integral value of gradient magnetic field in 1TR. The MRI apparatus comprises a signal acquisition device for applying static field, gradient magnetic field pulses and RF pulses to an object to acquire magnetic resonance signals therefrom, an image reconstruction device for reconstructing an image based on the magnetic resonance signals acquired, and a controller device for controlling both device. The controller device directs the signal acquisition device to apply gradient magnetic field pulses and RF pulses for selective saturation for a number of times prior to applying gradient magnetic field pulses and RF pulses for signal acquisition.
Claims20
An MRI apparatus comprising:
- a signal acquisition device for applying static field, gradient magnetic field pulses and RF pulses to an object to acquire magnetic resonance signals therefrom;
- an image reconstruction device for reconstructing an image based on the magnetic resonance signals acquired;
- and
- a controller device for controlling both the signal acquisition device and the image reconstruction device, wherein said controller device comprises:
- a signal acquisition controller unit for directing said signal acquisition device to apply saturation gradient magnetic field pluses and saturation RF pulses for a plurality of times for spatial selective saturation prior to directing said signal acquisition device to apply an acquisition gradient field pulse and an acquisition RF pulse for collecting the magnetic resonance signals.
An MRI apparatus comprising:
- a signal acquisition device for applying static field, gradient magnetic field pulses and RE pulses to an object to acquire magnetic resonance signals therefrom;
- an image reconstruction device for reconstructing an image based on the magnetic resonance signals acquired;
- and
- a controller device for controlling both the signal acquisition device and the image reconstruction device, wherein said controller device comprises:
- a first signal acquisition controller unit for directing said signal acquisition device to apply saturation gradient magnetic field pulses and saturation RE pulses for a plurality of times for spatial selective saturation prior to directing said signal acquisition device to apply an acquisition gradient field pulse and an acquisition RF pulse for collecting the magnetic resonance signals;
- a second signal acquisition controller unit for directing said signal acquisition device to apply the acquisition gradient magnetic field pulse and the acquisition RE pulse for collecting the magnetic resonance signals, without directing said signal acquisition device to apply the saturation gradient magnetic field pulses and the saturation IC pulses for spatial selective saturation;
- and
- an image reconstruction controller unit for directing said image reconstruction device to:
- reconstruct a first image based on the magnetic resonance signals collected under the control of said first signal acquisition controller unit;
- reconstruct a second image based on the magnetic resonance signals collected under the control of said second signal acquisition controller unit;
- and
- generate a differential image between these images using a difference between the first image and the second image.
A method for operating a Magnetic Resonance Imaging (MRI) apparatus, said method comprising:
- applying a static magnetic field to an subject to acquire magnetic resonance signals therefrom;
- repeatedly applying a plurality of saturation gradient magnetic field pulses and a plurality of saturation RF pulses to the subject to achieve spatial selective saturation;
- applying at least one acquisition gradient magnetic field pulse and at least one acquisition RF pulse to the subject after spatial selective saturation has been achieved;
- and
- reconstructing an image utilizing the magnetic resonance signals after applying the additional acquisition gradient magnetic field pulse and the at least one acquisition RF pulse.
Dependencies are inferred from the claim text.