A system for scanning an object is provided. The system may include: a supporting table configured to support the object; a first signal conversion unit configured to receive one or more first signals associated with the object and convert the first signals into one or more second signals; and a signal receiver board configured to receive the one or more second signals. The first signal conversion unit may include a plurality of first signal receiving channels. Each first signal receiving channel may be configured to receive a first signal associated with a portion of the object. The supporting table and the signal receiver board may be configured to move relative to each other to cause the signal receiver board to receive at least one second signal corresponding to at least one first signal received by at least one target channel of the first signal receiving channels.

A computer-implemented method for provision of a result dataset having position information of a local radio-frequency coil, including: providing input data having at least magnetic resonance data, which is acquired by means of the local radio-frequency coil; determining a result dataset by applying a trained function to the input data, wherein the result dataset comprises position information for determining the position of the local radio-frequency coil; and providing the result dataset.

In one embodiment, an image processing apparatus includes processing circuitry. The processing circuitry acquires an image in which a coil is depicted. The processing circuitry acquires, from the image, information on disposition of the coil and information on a port to which the coil is connected.

A coil for receiving a magnetic resonance signal is provided. The coil may include a first conductor; and a second conductor electrically coupled to the first conductor. The second conductor may extend along the first conductor. The first conductor may have at least one first opening or the second conductor may have at least one second opening. The first conductor and the second conductor may be electrically coupled using an electronic component placed at the at least one first opening or the at least one second opening so that an electric current flows between the first conductor and the second conductor through the electronic component.

A system for scanning an object is provided. The system may include: a supporting table configured to support the object; a first signal conversion unit configured to receive one or more first signals associated with the object and convert the first signals into one or more second signals; and a second signal receiver board configured to receive the one or more second signals. The first signal conversion unit may include a plurality of first signal receiving channels. Each first signal receiving channel may be configured to receive a first signal associated with a portion of the object. The supporting table and the second signal receiver board may be configured to move relative to each other to cause the second signal receiver board to receive at least one second signal corresponding to at least one first signal received by at least one target channel of the first signal receiving channels.

The invention provides for a magnetic resonance imaging system (100) comprising a main magnet (104) for generating a main magnetic field within an imaging zone (108). The magnetic resonance imaging system further comprises an RF coil (114) for acquiring magnetic resonance data (164) from the imaging zone, wherein the RF coil comprises multiple RF ports (124, 412, 414, 416, 500, 502, 702, 1004, 1006). The RF coil comprises a switch unit (120) for at least one of the multiple RF ports to individually couple or uncouple the at least one of of the multiple RF ports from the RF coil. The magnetic resonance imaging system further comprises a radio-frequency system (125) for supplying radio-frequency power to each of the multiple RF ports and an RF matching detection system (122) for measuring impedance matching data (166) between the radio-frequency system and the RF coil. Execution of the machine executable instructions causes a processor controlling the magnetic resonance imaging system to measure (200, 300, 302, 304) the impedance matching data using the RF matching detection system; determine (202) switch unit control instructions (168) using the impedance matching data, wherein the switch control instructions contain commands that control the at least one of the multiple RF ports to couple or decouple to impedance match the radio-frequency system to the RF coil; and control (204) the switch unit of the at least one of the multiple RF ports with the switch unit control instructions.

An NMR measurement apparatus includes a transmitting antenna including a transmitter coil, a capacitor, a dissipating component and a restricting component, and a receiving antenna physically separated from the transmitting antenna. A processor is configured to apply a drive signal at a first voltage level to generate a transmission signal having a selected transmission frequency, where the receiving antenna is deactivated during generation, connect the dissipating component to the transmitter coil to dissipate stored energy in the transmitter coil, connect the restricting component to the transmitter coil to restrict the transmitting antenna to a second voltage level smaller than the first voltage level and based on a voltage of NMR signals from the sensitive volume, activate the receiving antenna and detect a NMR signal, where the restricting component is connected to the transmitter coil and restricts the transmitting antenna during the activating and the detecting.

A magnetic resonance tomography scanner and a method for testing the magnetic resonance tomography scanner are provided. The magnetic resonance tomography scanner has a transmitter that is configured to transmit two-tone signals at different levels and to acquire intermodulation products of the two-tone signal with the receiver. A status of a receive path is inferred via a behavior of odd-order intermodulation products.

The present disclosure provides transmit/receive (T/R) systems for NMR or MRI systems. In one configuration, the systems and methods provided herein may use passively-shielded coils that are compatible with low-field operational environment to replace conventional T/R systems and spatial gradient systems. In some configurations, a low-field imaging T/R system is provided that is designed for nuclear magnetic stimulation and local flux sensitivity, while automatically rejecting incident radiant electromagnetic noise. The design advantageously leverages low required frequencies to distribute the pulse synthesis task, yielding a smaller system with easier maintenance and lower cost. The system may include distributed coil nodes that include a primary radiofrequency (RF) coil configured to transmit and receive RF signals and a secondary coil configured to passively shield the primary RF coil.

Methods, systems, and techniques for a field modification device for modifying a transmission field (Tx) and/or a receive field (Rx) used by an MR system are provided. The field modification device comprises a plurality of resonator elements being inducible by the transmission field and/or the receive field to resonate, thereby modifying the transmission field and/or the receive field, respectively, wherein a respective resonance frequency and/or resonance phase of a respective resonator element and/or of a respective group of resonator elements is individually controllable. The field modification device further comprises a device controller configured to individually control the respective resonance frequency and/or resonance phase of the respective resonator element and/or of the respective group of resonator elements .