Abstract: An MRI apparatus includes a navigator device for obtaining information of body motion produced by respiration of a subject by a navigator pulse sequence, and a respiration waveform display device for displaying a respiration waveform on the basis of the body motion information obtained by the navigator device.

Abstract: A magnetic resonance imaging apparatus executes scans for executing a navigator sequence for acquiring as navigator data a magnetic resonance signal from a navigator area containing tissues body-moved in a subject and executing an imaging sequence for acquiring a magnetic resonance signal from an imaging area as imaging data at the subject, thereby to generate an image with respect to the imaging area. The magnetic resonance imaging apparatus includes, a phase profile generating part which generates a phase profile so as to show a relationship between a phase of the navigator data and a position of the navigator area, a phase correcting part which corrects folding back of the phase profile generated by the phase profile generating part, and a position detecting part which detects a position of a tissue body-moved in the navigator area, based on the phase profile corrected by the phase correcting part.

Abstract: An RF coil includes a first loop coil element including a first plane closed by a first coil line and a second loop coil element including a second plane, wherein the first loop coil element and the second loop coil element move while maintaining a facing state to vary the square measure of a facing area in which the first coil plane and the second coil plane face each other. The first loop coil element includes a first spreading part having a first coil line disposed such that a distance of opposing by the first coil line parallel to a first moving direction widens in the first moving direction, in a direction normal to the first moving direction in which the movement takes place such that the square measure of the facing area increases relative to the second loop coil element in a direction parallel to the first plane.

Abstract: A magnetic resonance imaging apparatus includes a scan execution unit configured to execute a regular scan in which a navigator sequence for generating a magnetic resonance signal in a navigator area containing a region of interest moving with a biological movement of a subject and an imaging sequence for generating a magnetic resonance signal in an imaging area of the subject are carried out, and a signal processing unit configured to detect a position of a region of interest based on a magnetic resonance signal generated by a navigator sequence in the regular scan and to generate an image based on the detected position and the magnetic resonance signal generated by the imaging sequence.

Abstract: A magnetic resonance imaging apparatus includes a scan section for executing a navigator sequence which transmits an RF pulse to a subject to obtain each magnetic resonance signal as navigator data. Upon execution of the navigator sequence, the scan section excites both a navigator area having two regions from which intensities of different navigator data signals are obtained, said two regions containing a body-moved region of the subject, and a region different from the two regions simultaneously, and transmits the RF pulse in such a manner that the phase of navigator data obtained from the different region differs from the phase of at least one region of navigator data obtained from the two regions.

Abstract: A magnetic resonance imaging apparatus includes a first navigator data processor that generates a first phase profile based on first navigator data acquired by executing a first navigator sequence, generates a position profile indicative of a relationship between a plurality of region positions and time at which the first navigator sequence is executed, and detects a specific position in the position profile. A second navigator data processor generates a second phase profile based on second navigator data acquired by executing a second navigator sequence, detects the position of each region with respect to each second phase profile within a reference range set so as to contain the specific position, based on each second phase profile, and acquires the same as its corresponding position data.

Abstract: A magnetic resonance imaging apparatus executes scans for executing a navigator sequence for acquiring as navigator data a magnetic resonance signal from a navigator area containing tissues body-moved in a subject and executing an imaging sequence for acquiring a magnetic resonance signal from an imaging area as imaging data at the subject, thereby to generate an image with respect to the imaging area. The magnetic resonance imaging apparatus includes, a phase profile generating part which generates a phase profile so as to show a relationship between a phase of the navigator data and a position of the navigator area, a phase correcting part which corrects folding back of the phase profile generated by the phase profile generating part, and a position detecting part which detects a position of a tissue body-moved in the navigator area, based on the phase profile corrected by the phase correcting part.

Abstract: An RF coil includes: a first loop coil element including a first plane closed by a first coil line; and a second loop coil element including a second plane closed by a second coil line, in which part of said first plane and part of said second plane face each other, wherein: said first loop coil element and said second loop coil element so move while maintaining the facing state as to vary the square measure of the facing area in which said first coil plane and said second coil plane face each other; said first loop coil element includes: a first spreading part having a first coil line so disposed that the distance of opposing by said first coil line parallel to a first moving direction, widens in said first moving direction, in a direction normal to said first moving direction in which the movement so takes place that the square measure of said facing area increases relative to said second loop coil element in a direction parallel to said first plane; and a first coil crossing part in which a first coil line

Abstract: An MRI apparatus includes a navigator device for obtaining information of body motion produced by respiration of a subject by a navigator pulse sequence, and a respiration waveform display device for displaying a respiration waveform on the basis of the body motion information obtained by the navigator device.

Abstract: The present invention provides an MRI apparatus which prevents from developing body move artifacts on the image to improve the image quality. In the navigator sequence a scan unit emits first RF pulse so as to excite first slice plane area which is out of the imaging area and is intersecting the navigator area including the epiglottis, then it emits second RF pulse so as to excite second slice plane area which is out of the imaging area and is intersecting the first slice plane area in the navigator area including the epiglottis. Thereafter a body move detector detects the displacement of epiglottis due to the deglutition movement based on the navigator echo data, a raw data selector unit selects as raw data the imaging data thus obtained in the imaging sequence based on the displacement of epiglottis, then the image of the slice plane including the esophagus in the subject is generated from the imaging data thus selected.

Abstract: The present invention provides an MRI apparatus which prevents from developing body move artifacts on the image to improve the image quality. In the navigator sequence a scan unit emits first RF pulse so as to excite first slice plane area which is out of the imaging area and is intersecting the navigator area including the epiglottis, then it emits second RF pulse so as to excite second slice plane area which is out of the imaging area and is intersecting the first slice plane area in the navigator area including the epiglottis. Thereafter a body move detector detects the displacement of epiglottis due to the deglutition movement based on the navigator echo data, a raw data selector unit selects as raw data the imaging data thus obtained in the imaging sequence based on the displacement of epiglottis, then the image of the slice plane including the esophagus in the subject is generated from the imaging data thus selected.

Abstract: When two or more run of breath holding imaging with breathing interval therebetween is conducted, the present invention allows the slice position to follow the positional displacement of organ in each run. The present invention comprises an image capturing step for the navigator for imaging an MR image having the imaging area including the diaphragm during breath holding, a diaphragm position obtaining step for obtaining the diaphragm position by analyzing the navigator image, an image capturing step for the actual imaging for capturing an MR image of a desired slice during breath holding, and a breathing interval step for releasing respiration, in which these steps are iteratively repeated for twice or more. The slice position of second session or later is made to be a position which is set such that the slice position of first run is compensated for by the difference between the diaphragm position of the first run and the diaphragm position of the second run or later.

Abstract: With a view to providing a receiving coil which permits a subject to assume a supine position when radiographing the breast of the subject, thereby improving the working efficiency, a receiving coil for receiving a magnetic resonance signal from the breast of a subject lying within a static magnetic field space is provided in each of a first cup and a second cup of a brassiere which cups receive the breast of the subject SU therein.

Abstract: With a view to providing a receiving coil which permits a subject to assume a supine position when radiographing the breast of the subject, thereby improving the working efficiency, a receiving coil for receiving a magnetic resonance signal from the breast of a subject lying within a static magnetic field space is provided in each of a first cup and a second cup of a brassiere which cups receive the breast of the subject SU therein.