Patents Assigned to MRI Technologies
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Patent number: 10241179Abstract: An MRI method and an MRI system that simultaneously detect blood and/or CSF velocity or flow in plural slices or slabs preferably as not spatially adjacent. Two or more sets of interleaved slices or slabs can be assembled to cover the desired volume and derive higher quality MRI signals and images without a need for a contrast agent, even where the volume is too large for effective flow imaging with known techniques without contrast agent.Type: GrantFiled: March 24, 2017Date of Patent: March 26, 2019Assignee: ADVANCED MRI TECHNOLOGIES, LLCInventors: David Feinberg, Liyong Chen
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Patent number: 9474454Abstract: An MRI scanner and an MRI method that effectively reduce the inherent difference in timing of TE in the SIR images by using alternating polarity of the slice selective gradient pulse Gs and corresponding alternate polarity in RF phase offset in the excitation pulse. By using alternating polarity selective gradients, the refocusing gradient pulse on the Gs axis can be eliminated between the excitation pulses so that the time spacing between the multiple SIR excitation pulses is reduced, and therefore the time delay between onset of slice signal decay is reduced. This results in an earlier possible TE of the first excited slice, hence less signal decay and higher SNR, and overall the TE of different slices can be more nearly the same.Type: GrantFiled: October 1, 2012Date of Patent: October 25, 2016Assignee: ADVANCED MRI TECHNOLOGIES LLCInventor: David Feinberg
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Patent number: 9451903Abstract: An MRI system and method for dynamic susceptibility contrast (DSC) imaging use multiplexed echo planar imaging (M-EPI) to essentially simultaneously acquire MR signals for perfusion parameter images of multiple slices. This essentially simultaneous acquisition of MR signals for multiple slices can be repeated in rapid succession without deteriorating T2* contrast, which makes it practical to image multiple perfusion phases and brings about other significant benefits.Type: GrantFiled: November 22, 2012Date of Patent: September 27, 2016Assignee: ADVANCED MRI TECHNOLOGIES, LLCInventor: David Feinberg
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Patent number: 8260396Abstract: Quantitative assessment of haemodynamics by cycled arterial spin labeling (CACL) that distinguishes between blood magnetization tagged by a specific labeling pulse, using a time series acquisition in which all measured data sets are used for reconstruction of each single time step, thereby reducing measurement time while maintaining signal-to-noise ration compared to conventional ASL.Type: GrantFiled: September 19, 2006Date of Patent: September 4, 2012Assignee: Advanced MRI Technology, LLCInventor: Matthias Guenther
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Patent number: 8131034Abstract: Regional arterial spin labeling (regASL) speeds up acquisition without sacrificing the signal-to-noise ratio (SNR) of the resulting perfusion images by using the same control image (i.e. acquired without labeling of blood in a vessel) for two or more vascular territory measurements. This regional ASL is accomplished by creating prepared spin magnetization (e.g. inverted or saturated) in a specific blood vessel, instead of preparing spin magnetization in all feeding blood vessels. As in conventional ASL, two data sets are typically acquired in a downstream position: one with (label image) and one without preparation (control image) in one particular vessel.Type: GrantFiled: May 19, 2006Date of Patent: March 6, 2012Assignee: Advanced MRI Technologies, LLCInventors: Matthias Gunther, David Feinberg
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Patent number: 7898254Abstract: A magnetic resonance imaging (MRI) method of obtaining MRI images of a patient and storing the images in physical storage media.Type: GrantFiled: February 19, 2009Date of Patent: March 1, 2011Assignee: Advanced MRI Technologies, LLCInventors: David A. Feinberg, Sudhir Ramanna
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Patent number: 7613495Abstract: A method of detecting Parkinson's disease through MRI of substantial nigra pars compacta (SNc) tissue. The method involves obtaining a gray matter suppressed (GMS) MRI signal from the SNc tissue, obtaining a white matter suppressed (WMS) MRI signal of the SNc tissue, and combining information from the GMS and WMS MRI signals to produce resultant signals indicative of Parkinson's disease. A similar method can be used to detect Progressive Supranuclear Palsy. A method of distinguishing between the two diseases involves obtaining at least two starting MRI images of SNc tissue using different MRI parameters, and combining the starting images to compute resultant signals differentiating between the two forms of parkinsonism.Type: GrantFiled: November 30, 2001Date of Patent: November 3, 2009Assignee: Advanced MRI Technologies, LLCInventor: Michael Hutchinson
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Publication number: 20090212773Abstract: A magnetic resonance imaging (MRI) method of obtaining MRI images of a patient and storing the images in physical storage media.Type: ApplicationFiled: February 19, 2009Publication date: August 27, 2009Applicant: ADVANCED MRI TECHNOLOGIES, LLCInventors: David A. Feinberg, Sudhir Ramanna
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Patent number: 7020318Abstract: MR imaging produces a projection image showing better image contrast between small blood vessels and background than traditional net intensity projection (NIP) images but more visual clues to vessel depth than traditional maximum intensity projection (MIP) images.Type: GrantFiled: May 22, 2002Date of Patent: March 28, 2006Assignee: Advanced MRI Technologies, LLCInventors: Koichi Oshio, David A. Feinberg, Matthias Guenther
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Patent number: 6853188Abstract: MRI method and apparatus using simultaneous image refocusing of multiple MRI slices that have different phase histories imparted by applying different amount of additional energy to the different slices before the first refocusing, in combination with applying novel fid spoiling that suppresses interference between stimulated echoes and spin echoes of different slices while allowing non-interfering stimulated echoes to be added to the appropriate primary echoes.Type: GrantFiled: September 6, 2002Date of Patent: February 8, 2005Assignee: Advanced MRI Technologies, LLCInventors: David Feinberg, Matthias Guenther
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Patent number: 5036280Abstract: A cylindrical tube with closed ends contains an imaging fluid and a variety of imaging structures enclosed. Included is a slice thickness structure with a hole pattern in a chevron shape where the number of imaged holes determines the slice thickness. Slice planarity is determined by a number of contiguous disks with grooved patterns set at rotated angles with respect to each other. Geometric distortion and resolution are also measured by structures contained within the enclosure. Finally, the position of the first and last slices in a multiscan series is measured for accuracy by ramp wedges placed on the end caps of the enclosure. And lastly, air is entrapped in closed cell foam so there are no unconstrained bubbles migrating in the enclosure.Type: GrantFiled: February 13, 1990Date of Patent: July 30, 1991Assignee: MRI TechnologiesInventor: Jay A. Chesavage