A magnetic resonance imaging, MRI, system (2), comprises MRI electronics, including a transmitting coil (11) for transmitting radio frequency, RF, signals and a receiving coil (12) for receiving RF signals; and/or a transmitting/receiving coil (3) for transmitting and receiving RF signals; and cables (22), connecting the transmitting coil (11), receiving coil (12) and/or transmitting/receiving coil (3) to other electronic elements. The MRI system (2) further comprises an overheating detection unit to detect potential overheating of a patient's (1) tissue and/or a part of the MRI system (2) caused by at least one part of the MRI electronics; and a distance unit (16), wherein the distance unit (16) comprises a gas chamber (5), to be arranged between the at least one part of the MRI electronics and the patient (1) and/or between the at least one part of the MRI electronics and the part of the MRI system (2) and adapted to be filled with a gas such that a distance between the patient (1) and the part of the MRI electronics and/or between the part of the MRI system (2) and the part of the MRI electronics increases when the gas chamber (5) is filled with the gas, wherein the gas chamber (5) is in a deflated state when no significant overheating is detected, and an inflation unit (15) to fill the gas chamber (5) with the gas, wherein the overheating detection unit and the distance unit (16) are interconnected such that the inflation unit (15) fills the gas chamber (5) with the gas to increase the distance between the patient (1) and the part of the MRI electronics and/or between the part of the MRI system (2) and the part of the MRI electronics if the overheating detection unit detects significant overheating of the patients (1) tissue and/or the part of the MRI system (2).

A device for detecting and characterising electron spins in a sample includes an electromagnetic microresonator, having a resonant frequency cor in the microwave range and a quality factor Q and into which the sample is inserted; a device for creating a magnetic field B0 in the sample for bringing a spin transition frequency cos into resonance with the resonant frequency cor, such that cos=B0, where is a gyromagnetic factor of the spins; a spin detection device receiving signals from the electromagnetic microresonator associated with the sample and including at least one low-noise amplifier operating at a temperature of between 1 and 10 K and a series of amplifiers and a demodulator operating at ambient temperature.

The invention relates to a method of magnetic resonance (MR) imaging of an object positioned in an examination volume of a MR device. One aspect of the invention provides a method that enables parallel imaging in combination with fat suppression at an increased image quality, notably in combination with EPI. The method includes: acquiring reference MR signal data from the object in a pre-scan, acquiring imaging MR signal data from the object in parallel via one or more receiving coils having different spatial sensitivity profiles, wherein the MR signal data are acquired with sub-sampling of k-space and with spectral fat suppression, and reconstructing an MR image from the imaging MR signal data, wherein sub-sampling artefacts are eliminated using sensitivity maps indicating the spatial sensitivity profiles of the two or more RF receiving coils. A B.sub.0 map is derived from the reference MR signal data and the spatial dependence of the effectivity of the spectral fat suppression is determined using the B.sub.0 map. In the image reconstruction step, signal contributions from water and fat are separated using regularisation taking the spatial dependence of the effectivity of the spectral fat suppression into account. Moreover, the invention relates to a MR device for carrying out the method, and to a computer program to be run on a MR device.

A radio frequency coil assembly for an MRI system. A support structure extends between a first end and a second end in a first direction and between an inner surface and an opposite outer surface in a second direction perpendicular to the first direction. The support structure has channels that extend into the support structure in the second direction. An RF coil is configured to transmit and/or receive RF signals. The RF coil is supported by the outer surface of the support structure. The channels are at least partially positioned between the support structure and the RF coil in the first direction and are configured to convey a cooling medium to cool the support structure in use.

A radio frequency (RF) receiving coil assembly for a magnetic resonance imaging (MRI) system includes a plurality of loops. The RF receiving coil assembly also includes a plurality of electronics units, wherein a respective electronics unit of the plurality of electronics units is coupled to a respective loop of the plurality of loops, wherein each respective electronics unit includes circuitry configured to measure a temperature of the respective loop and to regulate power provided to the respective loop based on the temperature of the respective loop.

Embodiments of the present disclosure provide an interrogation device that is operable to apply one or more source signals to one or more coils surrounding a volume, where a material is disposed within the volume. Each of the one or more source signals may excite one of the one or more coils, and the behavior of each the one or more coils responsive to the exciting may be monitored. One or more parameters may be determined based on the behavior of each the one or more coils, and the one or more parameters may be utilized to generate a signature for the material within the volume. The signature may be compared to one or more signatures of known materials to identify the material within the volume.

Systems and methods are described, and one method includes illuminating a target-of-interest (TI) with an RF energy configured to effect, over a time duration extending from a first time to a second time, an increase in a temperature of the TI. At a first detection time within the time duration, a first temperature NQR signal spectrum of the TI is detected, and a corresponding first temperature NQR spectrum data set is generates. At a second detection time, subsequent to the first detection time, a second temperature NQR signal spectrum of the TI is detected and corresponding second temperature NQR spectrum data set is output. Based at least in part on the first temperature NQR spectral dataset and the second temperature NQR spectral dataset, the TI is classified between including the SI and not including the SI.

An RF coil has an improved structure to prevent an excessive heat from being transferred to an object, and a magnetic resonance imaging apparatus includes the same. The MRI apparatus includes an RF coil configured to receive an RF signal, wherein the RF coil may include a first cover configured to allow thermal insulation material to be injected into the inside thereof, a second cover configured to allow thermal insulation material to be injected into the inside thereof and detachably coupled to the first cover to form an inner space with the first cover, and at least one circuit board disposed in the inner space and on which a circuit element configured to receive the RF signal is mounted.

A magnetic resonance signal detection module includes an insulator block having a coil mounting section including a through hole serving as a detection hole into which a sample container is inserted. A low-frequency coil is provided on an inner surface of the through hole. A high-frequency primary resonator is embedded in the coil mounting section so as to surround the low-frequency coil.

The method comprises an initial cooling step (E0) during which the temperature (T_ECH) of the heat exchanger (30) is lowered and, at the same time, the flow rate of the said first flow (FL.sub.S) is set to an initial flow rate. Following the initial cooling step (E0), an operation of circulating the first flow (FL.sub.S) is initiated (E1) and during this the said first flow (FL.sub.S) passes through a heat exchange (30) at a first flow rate which is higher than the initial flow rate. The initial flow rate of the first flow may be set to zero or to a value set so that the pressure inside the said circuit is greater than or equal to the pressure outside the said circuit.