General Electric Company

Other

Ge Medical Systems Global Technology Company, LLC

Yoshihiro Tomoda

Masanori Ozaki

Kenji Suzuki

Graeme Colin McKinnon

Yongchuan Lai

Yuji Iwadate

Shaorong Chang

Hongbin Wang

Weiwei Zhang

Tongzhou Wang

Mitsuhiro Bekku

Marie Uno

Miho Nagasawa

The present invention provides a magnetic resonance imaging method and system, the method comprising performing the following steps at least once: a composition step: performing image composition processing on raw images received by a receiving coil that is pre-determined as an artifact coil and a receiving coil that is pre-determined as a non-artifact coil to obtain a composite image; and a correction step: obtaining a product of the above composite image and space sensitivity of the above artifact coil to replace the raw image received by the above artifact coil, and performing the above composition step again.

Magnetic resonance imaging method and system

An MR apparatus creating a timeline suitable for data acquisition in several temporal phases. The MR apparatus including a method for creating a timeline TLhaving a scan time of TSbased on a reference timeline TLhaving a scan time of TS. The method setting start points in time of scans SC, SCand SCin the timeline TLto the same points in time as those in the reference timeline TL, respectively. The method also setting the start point in time of the scan SCin the timeline TLto a sum of the scan time TSand a delay time TDwith respect to the scan SCin the timeline TL

System and method for automatic start time adjustment in multi-phase scanning

An MR apparatusperforms a sequence for acquiring an echo train from a subject. The MR apparatuscomprises upper-limit-value determining unit for determining an upper limit value etl_max for the echo train length based on a value Xand a value X, the value Xincluding echo spacing ESP and a lower limit value TEz_max for a maximum echo time. The MR apparatusfurther comprises unit for obtaining an echo train length based on the upper limit value etl_max for the echo train length and a number of views ypoint in which data acquisition is performed.

Obtaining an echo train length in a magnetic resonance apparatus

There is provided a scan condition determining apparatus, comprising: setting means for setting values of a plurality of parameters different from a repetition time and different from a bandwidth; and determining means for determining a specific value of the bandwidth based on the set values of the plurality of parameters such that a repetition time determined as a longer one of a first period of time and a second period of time is minimized, the first period of time being a time taken to perform a pulse sequence in one cycle, and the second period of time being a time taken from the start of a pulse sequence in one cycle until a pulse sequence in a next cycle is ready to perform determined by the thermal design restrictions of a gradient coil.

Scan condition determining apparatus, magnetic resonance apparatus, scan condition determining method, and program

There is provided a scan condition determining apparatus for a magnetic resonance imaging system comprising accepting means for accepting specification of a desired scan time; and searching means for searching for a second scan condition based on a first scan condition defined before the specification, by adjusting values of parameters affecting a scan time or a signal-to-noise ratio of signals obtained by a scan, said second scan condition being one with which the scan time approximates within an allowable range or matches the desired scan time, and besides, a lowest value of a relative signal-to-noise ratio of the signals approximates within an allowable range or matches a lowest value of the relative signal-to-noise ratio of the signals estimated based on the first scan condition. The parameters include, for example, any one of a number of times of addition, a y-axis direction resolution, a repetition time, and a number of data acquisition passes.

Scan condition determining apparatus and method for a magnetic resonance imaging system

An magnetic resonance apparatuscomprises dummy-slice defining unit. The dummy-slice defining unitdefines a dummy slice a in a region lying in a z-direction with respect to a group gr, and a dummy slice b in a region lying in a (&#x2212;z)-direction with respect to the group gr. The dummy-slice defining unitalso defines a dummy slice c in a region lying in the z-direction with respect to a group gr, and a dummy slice d in a region lying in the (&#x2212;z)-direction with respect to the group gr. The dummy-slice defining unitfurther defines the dummy slices a, b, c, d so that the slice thickness of the dummy slices a, b, c, d is greater than that of slices Lto L

In-flow signal reduction for T1 weighted imaging in a magnetic resonance imaging system

A scan condition determining apparatus determines scan conditions in a magnetic resonance imaging system. The scan condition determining apparatus includes: a setting unit for setting an imaging range, a desired spatial resolution and a desired SN ratio; and a determining unit for determining a matrix number in a frequency encode direction and a matrix number in a phase encode direction, based on the imaging range and the desired spatial resolution set by the setting unit and determining physical parameters different from the matrix number in a frequency encode direction and a matrix number in a phase encode direction, based on the determined matrix numbers, the set imaging range and the set desired SN ratio.

Scan condition determining device, magnetic resonance imaging system, scan condition determining method, and program

A magnetic resonance imaging apparatus for acquiring k-space data from a deformable imaging region of a subject and generating image data of the imaging region at the time of being deformed to a predetermined state, based on the acquired k-space data, includes a gradient coil for applying a gradient magnetic field in a phase encoding direction, and an image data calculation device for calculating a numeric value for defining a relationship between the imaging region at the time of being deformed to the predetermined state and the imaging region at an nth phase encoding and calculating image data of the imaging region at the time of being deformed to the predetermined state, based on the calculated numeric value and the k-space data acquired from the imaging region.

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Hino, Japan

Yoshihiro Tomoda