Patent application number | Description | Published |
20080315876 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGE GENERATING METHOD - A magnetic resonance imaging apparatus configured to scan a subject in order to collect magnetic resonance signals from the subject in a magnetostatic field space, the magnetic resonance imaging apparatus includes a scanning unit configured to execute an imaging pulse sequence after executing a preparation pulse sequence to transmit preparation pulses. The scanning unit, in executing the preparation pulse sequence, excites a spin of the subject by successively transmitting a first chemical saturation pulse, a T2 preparation pulse and a second chemical saturation pulse, which is a reversed pulse; transmits a first killer gradient pulse after transmitting the first chemical saturation pulse and before transmitting the T2 preparation pulse; transmits a second killer gradient pulse after transmitting the T2 preparation pulse and before transmitting the second chemical saturation pulse; and transmits a third killer gradient pulse after transmitting the second chemical saturation pulse and before executing the imaging pulse sequence. | 12-25-2008 |
20090062640 | MRI APPARATUS - An MRI apparatus for imaging of a bodily fluid flowing inside a subject includes a gradient coil which applies gradient pulses to the subject, a transmission coil which transmits RF pulses to the subject, and a control part which controls the gradient coil and the transmission coil. The control part controls the gradient coil and the transmission coil in order to: saturate longitudinal magnetization of the bodily fluid in a field of saturation positioned on an upstream flow of the bodily fluid during a saturation period, invert the direction of longitudinal magnetization of the bodily fluid in an imaging field of view positioned on an downstream flow of the bodily fluid during an inversion period following the saturation period, and acquire MR signals from the bodily fluid in the imaging field of view during a data acquisition period following the inversion period. | 03-05-2009 |
20090270719 | MRI APPARATUS - An MRI apparatus which images a subject in such that body fluid that flows is emphasized over background tissues, includes a first coil control device that causes a transmission coil and a gradient coil to execute a first pulse sequence for causing longitudinal magnetization components of the background tissues to differ from a longitudinal magnetization component of the body fluid, a second coil control device that causes the transmission coil and the gradient coil to execute a second pulse sequence that inverts the longitudinal magnetization components of the body fluid and the background tissues a plurality of times after the execution of the first pulse sequence, and a third coil control device that causes the transmission coil and the gradient coil to execute a third pulse sequence for acquiring each MR signal of the body fluid after the execution of the second pulse sequence. | 10-29-2009 |
20100045290 | MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD FOR CONTROLLING THE SAME - A magnetic resonance imaging apparatus includes a coil control device that controls a transmission coil and a gradient coil such that (A) a longitudinal magnetization adjustment pulse sequence for setting a longitudinal magnetization component positive in value of a first body fluid smaller than a longitudinal magnetization component positive in value of a second body fluid is executed on the first and second body fluids, (B) a longitudinal magnetization reverse pulse for reversing the longitudinal magnetization components of the first and second body fluids is transmitted, and (C) a data acquisition pulse sequence for acquiring data of the first body fluid when an absolute value of the longitudinal magnetization component of the first body fluid flowing through an imaging area is larger than an absolute value of the longitudinal magnetization component of the second body fluid, is executed. | 02-25-2010 |
20100327871 | MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD - A magnetic resonance imaging (MRI) apparatus sequentially transmits a plurality of radio frequency (RF) pulses for refocusing transverse magnetization of spins, and brings the transverse magnetization of the spins to longitudinal magnetization after the refocusing of the transverse magnetization of the spins. | 12-30-2010 |
20110190622 | MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD - A magnetic resonance imaging apparatus executes a pulse sequence for generating a phase shift of each spin, corresponding to a flow rate of the spin to thereby acquire magnetic resonance signals from a subject and determines a position of each blood vessel of the subject, based on each of the magnetic resonance signals. The magnetic resonance imaging apparatus includes a blood vessel position specifying device for specifying a position of each blood vessel, based on a change in signal intensity of the magnetic resonance signal with time and based on a change in the flow rate of the spin with time. | 08-04-2011 |
20120133359 | MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD - A magnetic resonance imaging apparatus configured to divide a data acquisition region defined in a k | 05-31-2012 |
20150077110 | MAGNETIC RESONANCE APPARATUS AND METHOD USING THEREOF - A magnetic resonance apparatus is provided. The magnetic resonance apparatus includes a scanner configured to execute a plurality of pulse sequences each including a plurality of RF pulses for generating magnetization transfer of protons and a data acquisition sequence for acquiring data from a region in which proton magnetization transfer occurs, wherein the phases of the plurality of RF pulses are cycled so as to make a phase difference between the phase of a pth RF pulse of the plurality of RF pulses and the phase of a p+1th RF pulse of the plurality of RF pulses different for each pulse sequence, and a controller configured to control operations that include processing for determining a spectrum indicative of a relationship between a signal intensity of each signal obtained from the region and the associated phase differences based on data obtained by executing the plurality of pulse sequences. | 03-19-2015 |