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| Number | Title | Issue Date |
| 8099149 | MRI method for quantification of cerebral perfusion A method for calculating quantitative perfusion measurements using an MRI system includes a pulse sequence that acquires perfusion weighted images and additionally measures T1 values before and after the administration of a contrast agent. T1 v... | 01/17/2012 |
| 8078257 | Complex amplitude modulation in blood flow and perfusion measurement for measuring a distribution of transit times on a voxel by voxel basis Systems and methods for blood flow and perfusion measurement using complex amplitude modulation of MRI pulses are presented. In exemplary embodiments of the disclosed subject matter, inflowing arterial spins can be modulated using a complex modulation function havin... | 12/13/2011 |
| 8050737 | Method and medical apparatus for measuring pulmonary artery blood flow In a method and apparatus for examination and evaluation of a blood flow in a pulmonary artery of a patient, measurement data are recorded, from which at least a part of the blood flow in the pulmonary artery is able to be re-constructed at least two-dimensionally i... | 11/01/2011 |
| 8027713 | Magnetic resonance imaging apparatus and image processing method A magnetic resonance imaging apparatus having control unit for fetching a plurality of image data and obtaining an image by a calculation. The control unit performs an unwrap processing to a plurality of regions for removing a main value of a phase rotation amount s... | 09/27/2011 |
| 7904136 | Method and system for evaluating vertebrobasilar disease A method and system are disclosed for evaluating symptomatic vertebrobasilar disease VBD which uses quantitative hemodynamic assessment in order to identify patients at high risk for stroke and provide appropriate guidance for intervention. Patients with symptomatic... | 03/08/2011 |
| 7899516 | Method and apparatus for determining the risk of rupture of a blood vessel using the contiguous element defined area A method for determining the risk of rupture of a blood vessel using an appropriate set of 2-D slice images obtained by scanning the blood vessel, the method comprising: generating a mesh model of the blood vessel using the set of 2-D slice images; conducting finite... | 03/01/2011 |
| 7894875 | Quantifying blood volume using magnetization transfer magnetic resonance imaging A magnetic resonance method for imaging blood volume in parenchyma via magnetic transfer (MT) includes: determining a MT effect of parenchyma; determining a MT effect of tissue; and quantifying the parenchymal blood volume using the difference between the MT effect ... | 02/22/2011 |
| 7865228 | Multi-slice cerebral blood flow imaging with continuous arterial spin labeling MRI This invention is a method for multi-slice CBF imaging using continuous arterial spin labeling (CASL) with an amplitude modulated control which is both highly effective at controlling for off resonance effects, and efficient at doubly inverting inflow spins, thus re... | 01/04/2011 |
| 7805181 | Non-invasive quantitative myocardial perfusion assessment In a computer-readable medium, device and method for quantitative assessment of cardiac perfusion, a myocardium is depicted on a series of cardiac images and is divided into image segments. A cardiac perfusion parameter is determined for each of the image segments. ... | 09/28/2010 |
| 7647086 | Apparatus and method for magnetic resonance angiography utilizing flow pulses and phase-encoding pulses in a same direction A magnetic resonance imaging apparatus includes an RF coil unit which generates RF pulses toward a subject, and which receives an MR signal from the subject. Gradient magnetic field coils generate a gradient magnetic field for slice selection, a gradient magnetic fi... | 01/12/2010 |
| 7627360 | MRI apparatus, flow quantification apparatus, and flow quantification method for ASL imaging An MRI apparatus is provided to quantify perfusion (microcirculatory blood flow in the tissue) in a region to be imaged in a subject based an ASL (arterial spin labeling) technique. The apparatus comprises imaging, storing, and flow quantifying units. The imaging un... | 12/01/2009 |
| 7613496 | Magnetic resonance imaging apparatus and magnetic resonance imaging method A magnetic resonance imaging apparatus includes a blood flow velocity acquiring unit that acquires a flow velocity of the blood flow of an object, a capturing condition setting unit that, on the basis of the flow velocity of the blood flow acquired by the blood flow... | 11/03/2009 |
| 7587233 | Velocity-selective arterial spin labeling without spatial selectivity Techniques for providing velocity-selective magnetic arterial spin labeling in magnetic resonance imaging (MRI) without spatial selectivity. In one implementation, an RF pulse train is applied to selectively tag spins according to velocities of the spins without sel... | 09/08/2009 |
| 7467005 | Method and apparatus for non-invasively measuring blood flow and for acquiring and processing an ECG signal The flow of blood in a vessel (G) in a living being (P) which is exposed to a magnetic field (B) is determined by measuring the potential difference (ΔV) between at least two points (P1, P2) next to the vessel (G). The potential difference (ΔV) is pr... | 12/16/2008 |
| 7416542 | Open circuit gravity-assisted uroflowmeter An open circuit gravity-assisted uroflowmeter has a urine collector having a generally open inlet in fluid communication with a sensing passage located at a lower elevation than the inlet, the sensing passage intersecting a magnetic field and having electrodes for d... | 08/26/2008 |
| 7412279 | Systems and methods for targeted magnetic resonance imaging of the vascular system This invention relates to MRI-based methods and systems useful for diagnosing and clinically assessing the presence, location, and size of cardiovascular disease-associated stationary targets, e.g., thrombi and atherosclerotic lesions, within the vascular system. Me... | 08/12/2008 |
| 7412277 | Multi-slice MR data acquisition in successive heartbeats with black blood contrast The invention includes a technique for efficient multi-slice image acquisition with black blood contrast in cardiac imaging such that MR data is acquired in each R-R interval of a cardiac cycle. The technique includes applying a non-selective inversion pulse, follow... | 08/12/2008 |
| 7403810 | Time resolved contrast-enhanced MR projection imaging of the coronary arteries with intravenous contrast injection In a method and apparatus for contrast-enhanced magnetic resonance (MR) angiography of the right coronary artery of a patient, a bolus of MR contrast agent is selected to have a size that will cause the bolus, after injection into the patient, to wash out of right c... | 07/22/2008 |
| 7403883 | Three-dimensional in-vitro spinal models and methods of analyzing substance distribution therein An in-vitro model apparatus of a human spine and methods for detecting and analyzing substance distribution patterns therein. In one embodiment, the model apparatus includes a column body defining a passageway that substantially mimics the size, shape, and structure... | 07/22/2008 |
| 7369888 | Multi-slice cerebral blood flow imaging with continuous arterial spin labeling MRI This invention is a method for multi-slice CBF imaging using continuous arterial spin labeling (CASL) with an amplitude modulated control which is both highly effective at controlling for off resonance effects, and efficient at doubly inverting inflow spins, thus re... | 05/06/2008 |
| 7369887 | Rapid multislice black blood double-inversion recovery technique for blood vessel imaging DIR imaging of blood vessels by administering a series of DIR preparation pulse modules at a repetition interval short enough that at least two DIR preparation pulse modules generally occur within each RR interval, and by acquiring image data for a plurality of slic... | 05/06/2008 |
| 7368910 | Dual gradient echo pulse sequence using interleaved spiral-out spiral-in k-space trajectories Measurements of functional, hemographic, and blood flow parameters use a multiple echo or spin echo gradient pulse sequence whereby an early echo is acquired near the beginning of the pulse sequence which avoids saturation effects and a later echo near the end of th... | 05/06/2008 |
| 7365543 | Magnetic resonance imaging apparatus and magnetic resonance imaging method An MRI apparatus includes an imaging signal acquisition unit, a motion signal acquisition unit, a motion amount determination unit, a motion correction unit and an image reconstruction unit. The imaging signal acquisition unit acquires MR signals as imaging signals.... | 04/29/2008 |
| 7348775 | Method for automatic shimming for nuclear magnetic resonance spectroscopy A method for homogenizing a static magnetic field with a magnetic field distribution B0(r) for nuclear magnetic resonance spectroscopy by adjusting the currents Ci through the shim coils, thus creating spatial field distributions Ci·S | 03/25/2008 |
| 7346383 | Method for acquiring MRI data from variable fields of view during continuous table motion MRA data is acquired from a large region of interest by translating the patient through the bore of the MRI system as a three-dimensional MRA data set are acquired. The pulse sequence is altered during the scan to change the lateral FOVL of the acquired i... | 03/18/2008 |
| 7343193 | Background suppression method for time-resolved magnetic resonance angiography A 3D projection reconstruction pulse sequence is employed during a CEMRA dynamic study to acquire a time course series of k-space data sets. Signals from non-vascular voxels are suppressed by reconstructing a corresponding series of low resolution images using the c... | 03/11/2008 |
| 7336072 | Method for representation of flow in a magnetic resonance image In a method for representation of flow in a magnetic resonance image, a first magnetic resonance image of an examination subject is acquired, wherein the flow occurring in the examination subject is not compensated in a first spatial direction; a second magnetic res... | 02/26/2008 |
| 7336375 | Wireless methods and systems for three-dimensional non-contact shape sensing Systems for acquiring an approximation of the surface geometry of a 3-dimensional object include a self-powered wireless, non-contact optical scanner, the location and orientation of which may be tracked with respect to an object coordinate system, and a processor c... | 02/26/2008 |
| 7333846 | Method and apparatus for functional magnetic resonance imaging In a method and a magnetic resonance apparatus for functional imaging, a number of images without and with a designational stimulation of the examination subject are sequentially registered in successive alternation, and an information value that indicates whether t... | 02/19/2008 |
| 7333848 | Method and system for evaluating vertebrobasilar disease A method and system are disclosed for evaluating symptomatic VBD which uses quantitative hemodynamic assessment in order to identify patients at high risk for stroke and provide appropriate guidance for intervention. Patients with symptomatic VBD may be considered f... | 02/19/2008 |
| 7328056 | Magnetic resonance method and apparatus for classifying an atheroma In a method and apparatus for classifying plaque in a blood vessel of a living subject using magnetic resonance imaging, a first magnetic resonance image is produced with a first intensity distribution of a cross-section of a vessel containing plaque, and a contrast... | 02/05/2008 |
| 7328054 | Perfusion magnetic resonance imaging using encoded RF tagging pulses A perfusion image is produced by acquiring a series of time course MR images from an imaging slice. During the acquisition spins flowing into the slice are repeatedly tagged with an RF tagging pulse having a flip angle that is modulated according to a tagging patter... | 02/05/2008 |
| 7317940 | MRT apparatus, method and computer program product for determining the speed of a flowing medium In a method for automatic determination of the actual speed interval of a flowing medium in flow measurements in magnetic resonance imaging, an overview image (localizer) is acquired displayed on a screen, a scout flow measurement is performed by acquiring an image ... | 01/08/2008 |
| 7315756 | Multi-slice double inversion-recovery black-blood imaging with simultaneous slice re-inversion A multi-slice double inversion recovery (DIR) pulse sequence with read out of a signal for imaging successive slices implemented on a magnetic resonance image scanner. In the method, when the DIR pulse sequence is applied before imaging each slice, a slab-selective ... | 01/01/2008 |
| 7313428 | Method and apparatus for magnetic resonance arteriography using contrast agents The present invention is a technique of, and system for, imaging vascular anatomy over distance considerably greater than the maximum practical field of view of a magnetic resonance imaging system while using substantially one contrast agent injection. The technique... | 12/25/2007 |
| 7310548 | Method of magnetic resonance perfusion imaging The present invention relates to a method of perfusion imaging comprising: performing a first magnetic resonance data acquisition (A) at a first sensitivity (b) value, performing a set of at least six second magnetic resonance data acquisitions (B1, B | 12/18/2007 |
| 7295006 | Method for measuring nuclear magnetic resonance longitudinal axis relaxation time of blood and apparatus using the same Disclosed are a method and apparatus for accurately measuring nuclear magnetic resonance (NMR) longitudinal axis relaxation time by minimizing the influence of the amount of blood. The method includes applying a first magnetic field MO to a living body po... | 11/13/2007 |
| 7292032 | Method and system of enhanced phase suppression for phase-contrast MR imaging An automated image processing technique is disclosed that evaluates pixels of a phase-difference image to determine those pixels corresponding to inflowing phase data and background phase data. Phase-difference images are generated from a first acquisition and a sec... | 11/06/2007 |
| 7282917 | Method and apparatus of multi-coil MR imaging with hybrid space calibration The present invention provides a system and method for parallel imaging that performs auto-calibrating reconstructions with a 2D (for 2D imaging) or 3D kernel (for 3D imaging) that exploits the computational efficiencies available when operating in certain data “d... | 10/16/2007 |
| 7256578 | Magnetic resonance imaging system A magnetic resonance imaging system includes a high-frequency magnetic field generating unit for generating and applying a high-frequency magnetic field to a subject placed in a static magnetic field, a gradient magnetic field generating unit for generating a gradie... | 08/14/2007 |
