Patent classifications
G01R33/5614
Magnetic resonance imaging method and magnetic resonance imaging apparatus
A magnetic resonance imaging method according to an embodiment includes performing a balanced SSFP sequence, repeatedly applies an excitation RF pulse to a subject at intervals of a repetition time and applies gradient magnetic field pulses balanced such that a time integral becomes zero within each interval of the repetition time, while further applying a spin labeling gradient magnetic field for generating one or more continuous spin labels within each interval of the repetition time.
Method and device for controlling a magnetic resonance imaging system as part of functional magnetic resonance imaging
In a method for controlling a magnetic resonance imaging system as part of functional magnetic resonance imaging, a main magnetic field B0 is provided having a field strength of at most 1.4 tesla at a main field magnet system (4) of the magnetic resonance imaging system (1); and a measurement is performed as part of functional magnetic resonance imaging, wherein a measurement sequence (MS) is applied that has a longer echo time TE (e.g. longer than 100 ms).
Image acquisition method and apparatus using parallel scheme of radio frequency irradiation and data acquisition
Disclosed is an image acquisition method and apparatus using a parallel scheme of radio frequency irradiation and data acquisition. The image acquisition method includes saturating a labile proton by radiating a first radio frequency (RF) pulse signal to an object, generating a proton signal by radiating a pulse sequence signal to the object, and obtaining a chemical exchange saturation transfer (CEST) image of the object, and the generating and the obtaining of which are repeatedly performed in parallel.
Method for varying undersampling dimension for accelerating multiple-acquisition magnetic resonance imaging and device for the same
Provided is an MRI image generation method including: acquiring first phase encoding lines obtained by undersampling along a first direction using an MRI device; acquiring second phase encoding lines obtained by undersampling in a second direction different from the first direction using the MRI device; generating a first MRI image based on the first phase encoding lines and the second phase encoding lines; and generating a second MRI image different from the first MRI image based on the first phase encoding lines and the second phase encoding lines.
SYSTEMS AND METHODS FOR PLANNING PERIPHERAL ENDOVASCULAR PROCEDURES WITH MAGNETIC RESONANCE IMAGING
Systems and methods for planning peripheral endovascular, and other, procedures based on magnetic resonance imaging (“MRI”] are provided. Mechanical properties of lesions, morphology, and vessel patency are characterized based on non-contrast angiography and ultrashort echo time (“UTE”] images. The methods described in the present disclosure also provide improved visualization of the vascular tree and microchannels.
WEARABLE BLOOD ANALYTE MEASUREMENT DEVICE AND METHOD FOR MEASURING BLOOD ANALYTE CONCENTRATION
A wearable blood analyte measurement device includes a casing defining an appendage—receiving bore and having an interior volume. A plurality of magnets is within interior volume. The magnets produce a magnetic field in the bore. A nuclear magnetic resonance (NMR) transceiver is supported by the casing and positioned to emit radiofrequency (RF) pulses to and receive NMR signals from the bore. An electronics assembly is within the interior volume and in communication with the NMR transceiver. A power source is in the interior volume and powers the NMR transceiver and the electronics assembly.
SYSTEM AND METHOD FOR MAGNETIC RESONANCE IMAGING
A system for MRI is provided. The system may obtain a plurality of sets of under-sampled k-space data corresponding to a plurality of frames. Each set of under-sampled k-space data may be acquired simultaneously from a plurality of slice locations of a subject in one of the frames using an MRI scanner. The system may reconstruct a plurality of reference slice images based on the sets of under-sampled k-space data of the plurality of frames. Each of the reference slice images may be representative of one of the slice locations in more than one frame of the frames. The system may further reconstruct a plurality of image series based on the sets of under-sampled k-space data and the reference slice images. Each image series may correspond to one of the slice locations and include a plurality of slice images of the corresponding slice location in the plurality of frames.
SYSTEMS AND METHODS FOR SIMULTANEOUS MULTI-SLICE MAGNETIC RESONANCE IMAGING
The present disclosure provides a system for SMS MRI. During each of a plurality of frames, the system may cause an MRI scanner to apply a plurality of PE steps to each of a plurality of slice locations of a subject to acquire echo signals. A phase modulation magnetic field gradient may be applied during each of at least some of the PE steps in the frame. For each frame, the system may reconstruct an aliasing image representative of the slice locations in the frame based on the corresponding echo signals. The system may also generate a plurality of reference slice images based on the aliasing images. The system may further reconstruct at least one slice image based on the aliasing images and the reference slice images. Each of the slice image may be representative of one of the slice locations in one of the frames.
Pulse sequences for low field magnetic resonance
A low-field magnetic resonance imaging (MRI) system. The system includes a plurality of magnetics components comprising at least one first magnetics component configured to produce a low-field main magnetic field B.sub.0 and at least one second magnetics component configured to acquire magnetic resonance data when operated, and at least one controller configured to operate one or more of the plurality of magnetics components in accordance with at least one low-field zero echo time (LF-ZTE) pulse sequence.
METHOD AND SYSTEM FOR MAGNETIC RESONANCE IMAGING
A method and system for imaging a body using a magnetic resonance imaging (MRI) apparatus, including motion tracking of a target object of the body using MRI by generating an MRI image of a region of interest of the body by performing a weighted combination of a signal received by each coil of an MRI apparatus during an MRI scan.