Nuclear Magnetic Resonance Imaging Apparatus
First Claim
1. A nuclear magnetic resonance imaging method that acquires an image of an imaging region of a subject to be examined, in a static magnetic field space of a nuclear magnetic resonance imaging apparatus provided with an FOV being desirable, the imaging region being wider than the FOV, while moving a transport unit having the examined subject thereon, comprising, a step that moves the examined subject so that the imaging region of the examined subject passes through the space for imaging, a step that relatively displaces the FOV with respect to the static magnetic field space, in response to information obtained from the examined subject during at least a part of a period when the examined subject is being moved, a step that executes an imaging pulse sequence while the examined subject is being moved, and collects nuclear magnetic resonance signals from the examined subject, and a step that reconstructs an image of the wide imaging region of the examined subject, by using the nuclear magnetic resonance signals.
1 Assignment
0 Petitions
Accused Products
Abstract
There is provided an MRI apparatus that is capable of imaging ON/OFF in response to a biological gating signal and changing conditions for imaging, even while the moving bed imaging is performed, and further reducing a load on a subject to be examined, which is caused by fluctuations in the bed moving velocity. A controller that controls a bed to transport the examined subject in a static magnetic field and a unit to apply an RF magnetic field and a gradient magnetic field for imaging configures settings so that the bed moving velocity is kept constant considering an entire imaging time, and further controls the magnetic applying unit for applying the RF magnetic field and the gradient magnetic field so that a moving velocity of the FOV (imaging area) in the subject coordinate system is made different from the bed moving velocity.
-
Citations
27 Claims
-
1. A nuclear magnetic resonance imaging method that acquires an image of an imaging region of a subject to be examined, in a static magnetic field space of a nuclear magnetic resonance imaging apparatus provided with an FOV being desirable, the imaging region being wider than the FOV, while moving a transport unit having the examined subject thereon, comprising,
a step that moves the examined subject so that the imaging region of the examined subject passes through the space for imaging, a step that relatively displaces the FOV with respect to the static magnetic field space, in response to information obtained from the examined subject during at least a part of a period when the examined subject is being moved, a step that executes an imaging pulse sequence while the examined subject is being moved, and collects nuclear magnetic resonance signals from the examined subject, and a step that reconstructs an image of the wide imaging region of the examined subject, by using the nuclear magnetic resonance signals.
-
23. A nuclear magnetic resonance imaging apparatus comprising,
a transport unit that transports a subject to be examined within a static magnetic field space including a desired FOV, an information obtaining unit that obtains information from the examined subject, a magnetic field application unit that applies a high-frequency magnetic field and a gradient magnetic field to the examined subject, a control means that controls the transport unit and the magnetic field application unit, and a signal processing unit that receives nuclear magnetic resonance signals generated from the examined subject to construct an image, wherein, in the nuclear magnetic resonance imaging apparatus that acquires the nuclear magnetic resonance signals while the examined subject is moved by the transport unit, and acquires an image of an imaging region wider than the FOV, the control unit controls the magnetic field application unit in such a manner that the FOV is relatively displaced with respect to the static magnetic field space, in response to the information from the examined subject, during at least a part of a period when the examined subject is moving.
Specification