Radio Frequency Coil Tuning Method and Apparatus
A technology of radio frequency coils and tuning components, applied in continuous tuning parts, multiple resonant circuits tuned to the same frequency, the size/direction of the magnetic field, etc., can solve the problems of high cost of equipment, limited availability of clinical MRI scanners, etc.
Active Publication Date: 2022-05-24
HYPERFINE INC
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Problems solved by technology
However, MRI suffers from several disadvantages that may involve, for a given imaging application, the relatively high cost of the equipment, limited availability and / or difficulty in obtaining access to clinical MRI scanners, and / or the image acquisition process length
The high cost and substantial space requirements of high-field MRI systems lead to limited availability of MRI scanners
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[0026] The MRI scanner market is overwhelmingly dominated by high-field systems, especially for medical or clinical MRI applications. As discussed above, the general trend in medical imaging is to produce MRI scanners with increasingly larger field strengths, with the vast majority of clinical MRI scanners operating at 1.5T or 3T, and 7T and 9T in research settings higher field strength. As used herein, "high field" generally refers to MRI systems currently used in clinical settings, and more particularly, it refers to the use of a main magnetic field of 1.5 T or more (ie, B 0 field), although clinical systems operating between 0.5T and 1.5T are also often described as "high field". Field strengths between approximately 0.2T and 0.5T have been described as "mid-field", and with increasing field strengths in the high field domain, field strengths in the range between 0.5T and 1T have also been described as midfield. In contrast, "low field" generally refers to utilizing B le...
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Abstract
Some aspects include a tuning system configured to tune a radio frequency coil for use with a magnetic resonance imaging system, the tuning system comprising: a tuning circuit comprising at least a tuning element; and a controller configured to set at least one value for the tuning element to cause the radio frequency coil to resonate at approximately a Larmor frequency of the magnetic resonance imaging system determined by the tuning system. Some aspects include a method of automatically tuning a radio frequency coil, the method comprising: determining information indicative of a Larmor frequency of a magnetic resonance imaging system; using a controller to automatically set at least one value of a tuning circuit based on the determined information, so that the RF coil resonates approximately at the Larmor frequency.
Description
Background technique [0001] Magnetic resonance imaging (MRI) provides an important imaging modality for many applications and is widely used in clinical and research settings to generate images of the inside of the human body. Generally, MRI is based on detecting magnetic resonance (MR) signals, which are electromagnetic waves emitted by atoms in response to changes in state caused by an applied electromagnetic field. For example, nuclear magnetic resonance (NMR) techniques involve the detection of MR signals emitted from the nuclei of excited atoms upon rearrangement or relaxation of the nuclear spins of atoms in the object being imaged (eg, atoms in human tissue). The detected MR signals can be processed to generate images that, in the context of medical applications, enable the study of internal structures and / or biological processes in the body for diagnostic, therapeutic and / or research purposes. [0002] MRI offers an attractive imaging modality for biological imaging b...
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IPC IPC(8): G01R33/025G01R33/20G01R33/32G01R33/36G01R33/58H03J3/12H03J3/24H01F7/02
CPCG01R33/3628G01R33/445G01R33/24G01R33/583
Inventor 托德·雷亚里克杰里米·克里斯托弗·乔丹格雷戈里·L·哈尔瓦特马修·斯科特·罗森
Owner HYPERFINE INC