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7623903 |
Double contrast technique for MRI-guided vascular interventions
A method to detect the location of a catheter relative to a targeted location in a blood vessel is provided. One example method includes acquiring and displaying magnetic resonance (MR) images...
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7620442 |
Colonography on an unprepared colon
A method for generating colonography images for colorectal screening of a patient. The patient is administered an amount of radiopaque stool marker which will enable stool present in the patient's...
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7610077 |
Quantitation of sample properties using contrast enhancement from saturation transfer
The manipulation of RF irradiation to a subject in which a CEST agent has been administered is employed to determine a biological parameter in vivo in conjunction with an MRI imaging process. The...
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7610076 |
Method for acquiring time-resolved MR images using continuous table motion
MRA data is acquired from an extended field of view by translating the patient through the bore of the MRI system as three-dimensional MRA data sets are acquired and time-resolved images...
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7606614 |
Prediction methods and apparatus
A method includes predicting a contrast bolus arrival time, and performing at least one of the following: a) automatically switching from a monitor phase to a scan phase at the predicted arrival...
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7606611 |
Method and apparatus for determining the azimuthal orientation of a medical instrument from MR signals
A medical apparatus, includes a medical instrument with an acquisition unit for a magnetic resonance signal, the acquisition unit exhibiting a non-constant sensitivity profile in the azimuthal...
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7596402 |
MRI probe designs for minimally invasive intravascular tracking and imaging applications
A probe suitable for attachment to, or incorporation in, a medical interventional device, such as a catheter, and which may be employed for tracking, imaging, or both, includes a first material...
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7587234 |
Method and apparatus for computer modified magnetic resonance imaging
A device is presented including a medical device adapted to be inserted in an anatomy. The medical device has many target markers. A magnetic resonance imaging (MRI) system will not detect or will...
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7583992 |
Magnetic resonance angiography with automated vessel segmentation
A magnetic resonance angiogram (MRA) is acquired using a contrast enhancement method in which a series of NMR images are rapidly acquired during a time resolved phase of the examination in which...
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7580737 |
Method and apparatus for determining treatment for stroke
A method and apparatus for evaluating acute stroke patients and for determining whether a stroke patient will benefit from the use of thrombolysis therapy includes obtaining measurements of the...
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7570985 |
Method and apparatus for magnetic resonance imaging using contrast agent
Monitor scans are performed before imaging scans with respect to a patient injected with a contrast agent. Magnetic resonance images of a plurality of slices of the patient are acquired, usually...
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7566321 |
Device for the injection of medical preparations with CT/MRI monitoring
In a device for the injection of medical preparations, into a patients body during an examination in a Computer Tomograph (CT) or in a Magnetic Resonance Tomograph (MRT) or endoscopically,...
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7565191 |
Tissue site markers for in vivo imaging
The invention is directed biopsy site markers and methods of marking a biopsy site, so that the location of the biopsy cavity is readily visible by conventional imaging methods, particularly by...
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7558615 |
Method and apparatus for intervention imaging in magnetic resonance tomography
In a method and apparatus for interventional imaging in magnetic resonance tomography, a contrast agent liquid is prepared by saturation or excitation of the nuclear spins therein, such that it...
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7542793 |
MR-guided breast tumor ablation and temperature imaging system
An MRI system is employed to aim an ultrasonic transducer at tissues to be treated and to produce images which enable the treatment of the tissues to be monitored. A pulse sequence is used which...
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7512435 |
Delay-compensated calculation of tissue blood flow
Methods for computing perfusion parameters are described. The methods are typically used to analyze magnetic resonance (MR) and other image data and to calculate tissue perfusion parameters such as...
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7512434 |
Remotely powered injector
A remotely powered magnetic resonance (NR) contrast media injector eliminates the use of batteries to power a power head in a shielded magnet room thereby eliminating inconvenient and costly...
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7502640 |
Positive contrast MRI of magnetically tagged cells, objects, tissues
Contrast agents incorporating super-paramagnetic iron-oxide (SPIO) nanoparticles have shown promise as a means to visualize labeled cells using MRI. Labeled cells cause significant signal dephasing...
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7483732 |
Magnetic resonance imaging of a medical device and proximate body tissue
Medical devices incorporate therein imaging materials having selected MRI detectable nuclei to provide useful magnetic resonance images of the medical devices and proximate body tissue. Also, a...
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7480525 |
Positive contrast MRI using positive and negative field inhomogeneity
The acquisition of multiple images at slightly different time shifts from the spin echo (or from TE=0 for gradient echo sequences), allows the separation of on-resonance spins from off-resonance...
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7477929 |
Method for forecasting the contrast medium flow in a living body
A method is disclosed for forecasting the contrast medium flow in a living body, in particular in a patient, in which a defined test bolus with a contrast medium is injected, preferably...
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7467075 |
Three-dimensional finite-element code for electrosurgery and thermal ablation simulations
A system and method for performing a simulation of an electrosurgical procedure are disclosed. The method includes the steps of generating a three-dimensional medium, which includes one or more...
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7467006 |
Magnetic resonance imaging system and contrast-enhanced angiography
An MRI system capable of acquiring a high-quality blood vessel image even during a measuring period other than at an injected contrast medium concentration peak by always picking up an image under...
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7457657 |
Magnetic resonance method and apparatus for determining the position and/or orientation of the image plane of slice image exposures of a vessel region in a contrast agent bolus examination
In a method and a magnetic resonance system for determining the position and/or orientation of the image plane of slice image exposures of a vessel region in a contrast agent bolus examination, in...
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7452364 |
Surgical marker/connector
A surgical marker/connector in the form of a ring includes a plurality of small suture attachments that are disposed about the ring. The suture attachments preferably are in the form of loops that...
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7450982 |
Magnetic resonance imaging system and method
A magnetic resonance imaging system is provided wherein measurement data (k space data) is extracted easily (and instantaneously) after imaging a plurality of times phases, and an image can be...
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7424320 |
Tissue localizing and marking device and method of using same
A delivery apparatus for the percutaneous placement of a medical device at an area of interest in a tissue mass comprises an introducer comprising a cannula having an insertion tip, an expulsion...
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7416533 |
Marking biopsy sites
A needle biopsy system for marking a sampling site is described.
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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,...
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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....
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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...
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7382124 |
Apparatus for producing hyperpolarized noble gas, and nuclear magnetic resonance spectrometer and magnetic resonance imager which use hyperpolarized noble gases
This apparatus for producing a hyperpolarized noble gas includes: a hyperpolarized noble gas generating cell in which a noble gas is subjected to an optical pumping in the presence of an alkali...
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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...
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7357917 |
Diagnostic procedures using 129Xe spectroscopy characterstic chemical shift to detect pathology in vivo
An in vivo non-invasive method for detecting and/or diagnosing a pathological condition using hyperpolarized 129 Xe spectroscopy is disclosed. Generally stated, the method includes determining the...
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7351402 |
Polarizing agents for dynamic nuclear polarization
We describe polarizing agents for use in enhancing NMR and MRI signals via dynamic nuclear polarization (DNP). The polarizing agents include two or more paramagnetic centers, preferably two...
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7346384 |
Method of magnetic resonance investigation of a sample using a nuclear spin polarised MR imaging agent
The present invention provides a method of contrast enhanced magnetic resonance imaging of a sample, said method comprising: a) administering a hyperpolarised MR contrast agent comprising non-zero...
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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...
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7333845 |
Non-invasive imaging for determination of global tissue characteristics
Evaluating tissue characteristics including identification of injured tissue or alteration of the ratios of native tissue components such as shifting the amounts of normal myocytes and fibrotic...
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7330748 |
Method for determining in vivo concentration of a metabolite
Method for determining in vivo concentration of a metabolite that includes administering a contrast agent to a subject, allowing the contrast agent to disperse to tissue of interest, performing...
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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...
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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...
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7307420 |
MRI method for simultaneous phase contrast angiography and invasive device tracking
A method for simultaneously tracking an invasive device disposed within a patient and acquiring an imaging signal of the patient with a magnetic resonance imaging (MRI) system during a single echo...
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7295007 |
Reducing movement artifacts in magnetic resonance measurements
An arrangement and a method for reducing movement artifacts in spatially resolved magnetic resonance measurements are proposed. A marker system which can emit or reflect at least one...
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7292720 |
Method and magnetic resonance tomography apparatus for graphic planning of angiographic exposures using a contrast agent
In a method and processing device for a magnetic resonance tomography apparatus, with which a test bolus measurement is conducted for a subsequent angiography measurement using contrast agent, a...
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7289841 |
Method and apparatus for volumetric cardiac computed tomography imaging
In a diagnostic cardiac imaging session of a patient's heart using a computed tomography imaging scanner ( 10 ) and a cardiac cycle monitor ( 42 ), a diagnostic objective ( 100 ) is received....
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7283862 |
Rapid multi-slice MR perfusion imaging with large dynamic range
The present invention includes a method and apparatus to perform rapid multi-slice MR imaging without ECG gating or requiring breath-holding that is capable of renal profusion analysis and...
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7283860 |
Communication systems for use with magnetic resonance imaging systems
An injector system for injection of a fluid medium into a patient within an electromagnetic isolation area. The injector system includes a powered injector, a system controller therefor, and a...
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7280865 |
Anchored fiducial apparatus and method
An anchored fiducial apparatus is described. The fiducial apparatus anchors itself in the target region once inserted so that the fiducial apparatus does not move relative to the target region.
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7251519 |
MR-method for the in vivo measurement of temperature or pH-value by means of a hyperpolarised contrast agent
The present invention provides a method of MR investigation of a sample, said method comprising: (i) nuclear spin polarizing a high T1 MR imaging agent which contains in its molecular structure at...
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7233687 |
System and method for identifying optimized blood signal in medical images to eliminate flow artifacts
In a sequence of medical image data showing tumors and blood vessels, a plasma signal is optimized to avoid flow artifacts by receiving a user input of a blood region and using the user input to...
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