Patent application number | Description | Published |
20120093384 | MAGNETIC RESONANCE IMAGING APPARATUS AND IMAGING SLICE DETERMINATION METHOD - In order to provide a technique for accurately realizing an examination, which is for acquiring a plurality of images of the same examination section, without a complicated operation and an extension of an examination time, body movement information of a subject is acquired immediately before each imaging in an examination, and it is determined whether or not there is a change in the position of the subject by comparing it with body movement information immediately before reference imaging. Only when there is a change in the position of the subject, an imaging slice setting image is acquired again. Then, a recommended imaging slice is calculated using the newest imaging slice setting image. | 04-19-2012 |
20120141007 | MAGNETIC RESONANCE IMAGING APPARATUS AND SYNCHRONOUS MEASUREMENT METHOD - An image with a desired contrast is obtained while suppressing body motion artifacts caused by both random motion and periodic motion of an object. In order to do so, an imaging sequence using a non-Cartesian sampling method is executed so as to synchronize with a biological signal only at the start time and a repetition time (TR), which is an execution interval between shots within the imaging sequence, is maintained. In addition, a time difference between a delay time and a start time of each shot is calculated, and a shot with a predetermined time difference or more is executed again after the TR time. | 06-07-2012 |
20120176132 | MAGNETIC RESONANCE IMAGING APPARATUS AND IRRADIATION FREQUENCY ADJUSTING METHOD - A high-quality image is obtained using a two-dimensional selective excitation method even if the static magnetic field is not uniform. Therefore, non-uniformity of a static magnetic field of a region to be focused in particular in a selective excitation region excited by 2DRF is measured, and a result of the measurement is reflected in an imaging sequence using the 2DRF. For example, a resonance frequency of magnetization obtained from the measurement result is set as an irradiation frequency of the 2DRF. In addition, a shim gradient magnetic field is applied so as to correct the non-uniformity of the magnetization obtained from the measurement result. These are applied only in the imaging sequence using the 2DRF, and an irradiation frequency and a shim gradient magnetic field set in a conventional method are used in other imaging sequences. | 07-12-2012 |
20120194190 | MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD FOR ADJUSTING EXCITATION REGION - In imaging using 2-dimensional selective excitation pulses, regardless of applications thereof, a technique for obtaining a high quality image is provided. | 08-02-2012 |
20140024924 | MAGNETIC RESONANCE IMAGING DEVICE AND MAGNETIC RESONANCE IMAGING METHOD - The present invention allows a subject to hold breathing at any position, and it is confirmed whether or not the breath holding is really performed in the middle of imaging to reflect its result to the imaging sequence. An image | 01-23-2014 |
20150157277 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - In order to respond to positional changes of body motion, such as respiratory motion, in various directions and to prevent an increase in the imaging time due to acquisition of body motion information or the occurrence of dead time in the measurement, a control unit of an MRI apparatus acquires association information in which body motion information detected by an external monitor, such as a pressure sensor for monitoring the movement of an object to be examined, and body motion information measured from an NMR signal by the navigator sequence are associated with each other in advance. During imaging, body motion information from the navigator is estimated using body motion information detected by an external monitor mounted on the object to be examined and the association information acquired in advance, and control, such as performing gating imaging or correcting the imaging slice position based on the estimated body motion position, is performed. | 06-11-2015 |