Hitachi, Ltd.

Hitachi Medical Corporation

Fujifilm Healthcare Corporation

Binrong Wu

Toru Shirai

Suguru Yokosawa

Hiroyuki Itagaki

Takashi Nishihara

Hisako Nagao

Chikako Moriwake

A magnetic resonance imaging (MRI) apparatus performs automatic positioning with high accuracy within a short time with respect to tissues having a complicated anatomic structure. First measurement of scout imaging is executed before main imaging for acquiring a diagnosis image, and one-dimensional or two-dimensional measurement data is acquired. The right and left of a subject is determined by using the measurement data acquired in the first measurement. A cross-section position in second measurement of the scout imaging is calculated by using a determination result in the right and left determination and the measurement data acquired in the first measurement, the second measurement at the cross-section position is executed, and two-dimensional measurement data is acquired. A cross-section position in the main imaging is calculated by using the two-dimensional measurement data acquired in the second measurement.

Magnetic resonance imaging apparatus, and automatic imaging position setting method

According to this invention, in order to obtain high-quality images even when the slice selective gradient magnetic fields waveform is distorted by eddy currents and vibration, high-frequency magnetic field information is calculated on the basis of an output gradient magnetic field waveform applied in accordance with the input gradient magnetic field waveform that is set in a pulse sequence, and the calculated high-frequency magnetic field information is set in the pulse sequence. Then, the set input gradient magnetic field, and the excitation RF pulses of the calculated high-frequency magnetic field information are used during imaging. The output gradient magnetic field waveform used in determining the excitation RF pulses is found by measurement and calculation, for example, by using the input gradient magnetic field waveform.

Magnetic resonance imaging apparatus and high-frequency magnetic field dertermination method

An object is to enhance usability of parameter check when an imaging parameter is changed in multistation imaging, and easily obtain a desired image with high quality. In the multistation imaging, it is determined in a lump before imaging whether an image having desired quality is obtained by using the changed value of the imaging parameter, and the result is presented to an operator. The determination is executed in the order of 'possible or impossible' determination of execution of imaging itself and 'possible or impossible' determination of combination of obtained images. When it is determined that it is impossible to execute the imaging itself, the determination processing is finished. At this time, a recommended value may be presented.

Magnetic resonance imaging apparatus and method of assisting setting of imaging parameter

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Tokyo, Japan

Binrong Wu