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IC:A61B5/00 AND EN_ALLTXT:(coronavirus OR coronaviruses OR coronaviridae OR coronavirinae OR orthocoronavirus OR orthocoronaviruses OR orthocoronaviridae OR orthocoronavirinae OR betacoronavirus OR betacoronaviruses OR betacoronaviridae OR betacoronavirinae OR sarbecovirus OR sarbecoviruses OR sarbecoviridae OR sarbecovirinae OR "severe acute respiratory syndrome" OR sars OR "2019 ncov" OR covid)

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Analysis

1.20040254472Methods and apparatus for a remote, noninvasive technique to detect core body temperature in a subject via thermal imaging
US 16.12.2004
Int.Class A61B 5/01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
01Measuring temperature of body parts
Appl.No 10854574 Applicant MCQUILKIN GARY L Inventor McQuilkin Gary L.

An approach to noninvasively, remotely and accurately detect core body temperature in a warm-blooded subject, human or animal, via thermal imaging. Preferred features such as the use of in-frame temperature references, specific anatomical target regions and a physiological heat transfer model help the present invention to overcome pitfalls inherent with existing thermal imaging techniques applied to physiological screening applications. This invention provides the ability to noninvasively, remotely and rapidly screen for diseases or conditions that are characterized by changes in core body temperature. One human application of this invention is the remote screening for severe acute respiratory syndrome (SARS), since fever is a common, early symptom. Other diseases and conditions that affect the core body temperature of humans or animals may also be noninvasively and remotely detected with this invention.

2.20080154138Methods and apparatus for a remote, noninvasive technique to detect core body temperature in a subject via thermal imaging
US 26.06.2008
Int.Class A61B 5/01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
01Measuring temperature of body parts
Appl.No 12072938 Applicant MCQUILKIN GARY L Inventor McQuilkin Gary L.

An approach to noninvasively, remotely and accurately detect core body temperature in a warm-blooded subject, human or animal, via thermal imaging. Preferred features such as the use of in-frame temperature references, specific anatomical target regions and a physiological heat transfer model help the present invention to overcome pitfalls inherent with existing thermal imaging techniques applied to physiological screening applications. This invention provides the ability to noninvasively, remotely and rapidly screen for diseases or conditions that are characterized by changes in core body temperature. One human application of this invention is the remote screening for severe acute respiratory syndrome (SARS), since fever is a common, early symptom. Other diseases and conditions that affect the core body temperature of humans or animals may also be noninvasively and remotely detected with this invention.

3.WO/2013/169368SYSTEM AND METHOD FOR LOCAL SAR REDUCTION IN MULTISLICE PARALLEL TRANSMISSION MAGNETIC RESONANCE IMAGING USING SAR HOPPING BETWEEN EXCITATIONS
WO 14.11.2013
Int.Class A61B 5/055
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
05Measuring for diagnosis by means of electric currents or magnetic fields
055involving electronic or nuclear magnetic resonance, e.g. magnetic resonance imaging
Appl.No PCT/US2013/031521 Applicant THE GENERAL HOSPITAL CORPORATION Inventor GUERIN, Bastien
Described here are a system and method for designing radio frequency ("RF") pulses for parallel transmission ("pTx") applications, and particularly pTx applications in multislice magnetic resonance imaging ("MRI"). The concept of "SAR hopping" is implemented by framing the concept between slice-selective excitations as a constrained optimization problem that attempts designing multiple pulses simultaneously subject to an overall local SAR constraint. This results in the set of RF waveforms that yield the best excitation profiles for all pulses while ensuring that the local SAR of the average of all pulses is below the regulatory limit imposed by the FDA. Pulses are designed simultaneously while constraining local SAR, global SAR, and peak power, and average power explicitly.
4.20030098687Magnetic resonance imaging apparatus and method with adherence to SAR limits
US 29.05.2003
Int.Class G01V 3/00
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation
Appl.No 10269687 Applicant Siemens Aktiengesellschaft Inventor Arneth Friedrich

In a method and apparatus for magnetic resonance imaging with adherence to SAR limit values, a patient is subjected to a radio-frequency pulse sequence via at least one transmission antenna and the magnetic resonance signals that are produced are acquired in a spatially resolved manner via at least one reception antenna and are further-processed for producing magnetic resonance images or spectra, with current SAR values, determined before the implementation of the measurement on the basis of patient data and the position of the patient relative to the transmission antenna for planned parameters of the measurement, being modified as warranted until the current SAR values lie within the SAR limit values. The determination of the current SAR values ensues by comparing the current measurement situation to pre-defined measurement situations stored in a data bank for which pre-calculated SAR values are stored. The stored SAR value of the measurement situation of the data bank coming closest to the current measurement situation is utilized as the current SAR value. A reduction of the calculating outlay for determining the SAR values during the examination is achieved, and the data bank values can be calculated highly detailed, allowing a more exact determination of the current SAR values. The reduction of the safety margins that is achieved allows an enhancement of the system performance for the user, so that the user can implement the measurements in a shorter time and/or simultaneously acquire a number of tomograms.

5.20120197106Parallel Excitation of Nuclear Spins With Local SAR Control
US 02.08.2012
Int.Class A61B 5/055
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
05Measuring for diagnosis by means of electric currents or magnetic fields
055involving electronic or nuclear magnetic resonance, e.g. magnetic resonance imaging
Appl.No 13394744 Applicant Cloos Martijn Inventor Cloos Martijn

A method of exciting nuclear spins in a sample, wherein a plurality of transmit coils are driven in parallel to emit respective radio-frequency excitation pulses, the method comprising computing the phases and/or amplitudes of said excitation pulses by solving an optimization problem for minimizing the difference between the excitation distribution within said sample and a target excitation distribution, and being characterized in that: said optimization problem includes a cost function depending on the power emitted by said transmit coils through respective coil-dependent weighting coefficients; and in that the phases and/or amplitudes of the excitation pulses are computed iteratively, each iteration step comprising: solving said optimization problem based on present values of the weighting coefficient, and subsequently updating the value of at least one of said coefficients so as to control in a predetermined way the local specific absorption rate—SAR—distribution within the sample. The method of the invention allows, in particular, reducing the local SAR maximum value within the sample and/or ensuring that the local SAR takes its maximum value within a predetermined region of the sample.

6.20030098688Magnetic resonance imaging method with adherence to SAR limits
US 29.05.2003
Int.Class G01V 3/00
GPHYSICS
01MEASURING; TESTING
VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
3Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination or deviation
Appl.No 10269728 Applicant Siemens Akiengesellschaft Inventor Brinker, Gerhard

In a method for magnetic resonance imaging with adherence to SAR limit values, a patient is charged with a radio-frequency pulse sequence via at least one transmission antenna for the implementation of a measurement in a magnetic resonance tomography apparatus, and the magnetic resonance signals that are produced are acquired in a spatially resolved manner via at least one reception antenna and are further-processed for producing magnetic resonance images or spectra. SAR values are determined before the implementation of the measurement on the basis of patient data and the position of the patient relative to the transmission antenna for planned parameters of the measurement, and the parameters are modified as needed until the SAR values lie within the SAR limit values. The position of the patient relative to the transmission antenna is exactly determined by an imaging magnetic resonance pre-measurement. The method enables adherence to the SAR limit values without having to take large tolerances into consideration. No additional hardware whatsoever and no positioning rule for the user are required for the realization of the method.

7.20110263969SAR ESTIMATION IN NUCLEAR MAGNETIC RESONANCE EXAMINATION USING MICROWAVE THERMOMETRY
US 27.10.2011
Int.Class A61B 5/055
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
05Measuring for diagnosis by means of electric currents or magnetic fields
055involving electronic or nuclear magnetic resonance, e.g. magnetic resonance imaging
Appl.No 13092794 Applicant Fontius Jörg Ulrich Inventor Fontius Jörg Ulrich

The present embodiments relate to methods and devices for measuring a spatial temperature and/or SAR distribution in an examination subject in a magnetic resonance tomography device. Microwave thermosensors are provided for measuring the temperature with the aid of microwaves.

8.1083439MRI spin excitation within a predetermined specific absorption rate (SAR) limit
EP 14.03.2001
Int.Class G01R 33/58
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
44using nuclear magnetic resonance
48NMR imaging systems
58Calibration of imaging systems, e.g. using test probes
Appl.No 00307141 Applicant YOKOGAWA MEDICAL SYST Inventor TSUKAMOTO TETSUJI
In order to provide a spin excitation method and apparatus for performing imaging with good efficiency while keeping within an SAR limit, and a magnetic resonance imaging apparatus employing such a spin excitation apparatus, an SAR of an object to be imaged in executing a pulse sequence is predicted (704); and at least one among the number of pulses, pulse waveform and pulse width of the RF pulses in the pulse sequence is adjusted (706) so that the predicted SAR value falls within a predetermined limit.
9.20150323629Magnetic resonance imaging apparatus and SAR computing method
US 12.11.2015
Int.Class G01R 33/54
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
44using nuclear magnetic resonance
48NMR imaging systems
54Signal processing systems, e.g. using pulse sequences
Appl.No 14701624 Applicant TOSHIBA MEDICAL SYSTEMS CORPORATION Inventor Shinji Mitsui

A magnetic resonance imaging apparatus includes a static magnetic field generator, a gradient magnetic field generator, a transmission coil and a processing circuitry. The static magnetic field generator generates a static magnetic field. The gradient magnetic field generator generates a gradient magnetic field. The transmission coil applies an RF pulse to an object. The processing circuitry determines high frequency pulse power absorbed by other than the object in accordance with a volume of the object and computes a specific absorption rate (SAR) with the determined high frequency pulse power.

10.20200054259HIGH DENSITY ANALOG MULTIPEXING
US 20.02.2020
Int.Class A61B 5/145
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
145Measuring characteristics of blood in vivo, e.g. gas concentration, pH-value
Appl.No 16543499 Applicant EnLiSense, LLC Inventor Devangsingh Gajendarsingh Sankhala

Systems, methods, and devices include a high-density analog multiplexer topology. Such topologies can be used, for example, in sensor device applications. An analog multiplexer circuit can include circuitry to receive N input signals; and circuitry to generate N selection signals for selecting one of said N data signals to be output from said analog multiplexer circuit. The analog multiplexer comprises one or more analog impedances.