Ge Medical Systems Global Technology Company, LLC

General Electric Company

Ge Precision Healthcare LLC

Naoyuki Takei

Mitsuharu Miyoshi

Ersin Bayram

Yuji Iwadate

Tetsuji Tsukamoto

Kang Wang

Lloyd Estkowski

A system for acquiring an image in which deterioration of vascular signals due to improved water-fat swap is provided. The system includes a magnetic resonance imaging device, which receives an out-of-phase signal and in-phase signal from an imaging site including a blood vessel. The system also includes a processor that processes a digital signal including data representing the out-of-phase signal and in-phase signal. The processor executes an operation including: generating a water image Wa based on the digital signal; and adding a signal intensity |I| of the out-of-phase signal and a signal intensity of the in-phase signal to the water image Wa to generate a vascular image representing the blood vessel.

Magnetic resonance imaging device, vascular image generation method, and recording medium

To provide a technique with which a FLAIR image and a T1-weighted image can be acquired in a short scan time, a magnetic resonance imaging apparatus comprises: an RF driver unitfor driving an RF coil unit; a gradient coil driver unitfor driving a gradient coil unit; and a controller unitconnected to the RF coil driver unitand gradient coil driver unit, for controlling them so that an imaging sequence ISc having a duration of 1TR for generating echoes from a body part being imaged is repetitively executed, where the imaging sequence ISc has a first sequence part SQincluding an inversion pulseand an FSE sequence, and a second sequence part SQincluding an inversion pulseand a GRE sequence

Magnetic resonance imaging apparatus, and program

A magnetic resonance imaging apparatus comprises a scanning unit for performing a pulse sequence PS including a MT (Magnetization Transfer) pulse b for lessening signals from the cerebral parenchyma (white matter and gray matter). The scanning unit performs the pulse sequence PS in periods of time Pand Pin the pulse sequence PS so that the MT pulse b is applied every repetition time TR, while it performs the pulse sequence PS in a period of time Pin the pulse sequence PS so that no MT pulse b is applied.

Magnetic resonance apparatus

An MRI system for performing time resolved MR imaging of an object with grouped data acquisition is provided. The MRI system includes an MRI controller in electronic communication with a magnet assembly and operative to sample a group of data points within a first region of a k-space. The first region includes a central sub-region and a first peripheral sub-region. The MRI controller is further operative to sample a group of data points within a second region of the k-space. The second region includes the central sub-region and a second peripheral sub-region different from the first peripheral sub-region.

MRI system and method for performing time resolved MR imaging of an object with grouped data acquisition

A magnetic resonance imaging apparatus configured to carry out a pulse sequence in synchronization with a biosignal is provided. The pulse sequence includes an RF pulse, and a data acquisition sequence for acquiring data when a wait time has passed after the RF pulse, wherein the wait time has a variable value that can be varied based on the biosignal.

Magnetic resonance imaging apparatus and method

A magnetic resonance imaging apparatus includes z segments which divide a ky-kz plane. The z segments includes data located therein. The ky-kz plane is divided into z center-in regions and z center-out regions by a plurality of lines extending radially from a center of the ky-kz plane. The z center-in regions have data located therein in accordance with first trajectories which proceed toward the center of the ky-kz plane. The z center-out regions have data located therein in accordance with second trajectories which proceed in a direction spaced away from the center of the ky-kz plane. Each of the z segments has one center-in region of the z center-in regions and one center-out region of the z center-out regions. Each of the z segments is defined in which after data have been located in said one center-in region in accordance with the first trajectory, data are located in said one center-out region in accordance with the second trajectory. At least one of the z segments is defined in which an angle of said one center-in region at the center of the ky-kz plane is wider than an angle of said one center-out region at the center of the ky-kz plane.

An MRI apparatus for imaging a subject so as to emphasize, more than a background tissue, a bodily fluid flowing through an imaging region of the subject, the apparatus includes a transmission coil for transmitting an RF pulse to the subject, a first transmission coil control device for controlling the transmission coil so that the transmission coil transmits a first inversion pulse for inverting longitudinal magnetization components of the bodily fluid and the background tissue to negative values from the positive values, a second transmission coil control device for controlling the transmission coil so that the transmission coil transmits a second inversion pulse for inverting the longitudinal magnetization component of the background tissue to the positive value from the negative value inverted by the first inversion pulse, a third transmission coil control device for controlling the transmission coil so that the transmission coil transmits a third inversion pulse for inverting the longitudinal magnetization component of the background tissue to the negative value from the positive value inverted by the second inversion pulse and a fourth transmission coil control device for controlling the transmission coil so that the transmission coil transmits an excitation pulse for acquiring data about the bodily fluid.

MRI apparatus

A magnetic resonance imaging apparatus includes a gradient coil for applying a gradient pulse, a transmitting coil for transmitting an RF pulse, and a coil control device for controlling the gradient coil and the transmitting coil in such a manner that a pulse sequence for (A) making an absolute value of longitudinal magnetization of a first background tissue and an absolute value of longitudinal magnetization of a second background tissue longer in T1 value than the first background tissue smaller than an absolute value of longitudinal magnetization of body fluid of a subject, (B) acquiring magnetic resonance signals from the subject, and (C) flipping transverse magnetization of the second background tissue to longitudinal magnetization is repeatedly executed.

Magnetic resonance imaging apparatus and program

A magnetic resonance imaging apparatus includes a gradient coil, a transmission coil, an electrocardiographic signal detecting device detecting an electrocardiographic signal from a subject, a controlling device controlling the gradient coil and the transmission coil so that a pulse sequence including a preparation pulse and a data acquisition sequence for acquiring data from a subject utilizing a magnetic resonance phenomenon is repeatedly carried out, and a cardiac phase computing device computing the cardiac phase of the subject based on the electrocardiographic signal. The controlling device determines whether or not to re-acquire data once acquired from the subject based on the cardiac phase of the subject at an arbitrary time in a period during which the pulse sequence is carried out or the cardiac phase of the subject at a time after the pulse sequence is terminated.

Magnetic resonance imaging apparatus, method and program of magnetic resonance imaging

A magnetic resonance imaging method includes the steps of performing a scan for collecting magnetic resonance signals from a subject in an imaging space where a magnetostatic field is formed, so as to match the PROPELLER method, wherein in executing the scan by the PROPELLER method, a reversed pulse is transmitted to the subject when the magnetic resonance signals are to be so collected successively at every repetition time as to match a blade including a plurality of trajectories and the magnetic resonance signals are successively collected by executing a pulse sequence matching the GRE method after the time of reversal has elapsed.

Magnetic resonance imaging apparatus, magnetic resonance imaging method and program therefor

For the purpose of preventing development of motion artifacts and improving image quality, a first displacement Nof the diaphragm before a scanning sectionperforms an imaging sequence and a second displacement Nof the diaphragm after the scanning sectionhas performed the imaging sequence are detected by a body motion detecting sectionas displacement caused by respiratory motion of a subject. Thereafter, based on the first displacement Nand second displacement Nof the diaphragm detected by the body motion detecting section, imaging data is selected as raw data by a raw data selecting sectionThen, based on the imaging data selected as raw data by the raw data selecting sectiona slice image of the subject is produced by an image producing section

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Tokyo, Japan

Naoyuki Takei