General Electric Company

Other

Masanori Ozaki

Yoshihiro Tomoda

Kenji Suzuki

Miho Nagasawa

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

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Hino, Japan

Masanori Ozaki