Abstract: Method acquiring a target physiological motion signal, including: acquiring multi-channel complex signals received by multiple channels; and acquiring, from the multi-channel complex signals using a motion signal synthesis vector corresponding to a target motion signal, a target motion complex signal with interference removed; acquiring data received by multiple channels, the data including data without external interference in a first sub-period and data with external interference in a second sub-period; acquiring an external interference suppression matrix based on the data, and acquiring external interference suppression data based on the data without external interference or the data with external interference and the external interference suppression matrix; acquiring a motion signal correlation matrix of the target motion signal in frequency domain based on a frequency range of the target motion signal; and using, as a motion signal synthesis vector, an eigenvector acquired according to an eigenvalue of

Abstract: A power supply apparatus for a magnetic resonance apparatus has a power supply terminal module with a power supply unit and a reference voltage pull-down unit, and a load terminal module with a voltage comparator connected to a load power-feed terminal, which compares a nominal voltage and an actual voltage of the load power-feed terminal. A counter begins counting when the actual voltage is lower than the nominal voltage, and keeps its count unchanged when the actual voltage is equal to the nominal voltage, and emits a signal corresponding to the count to a digital-to-analog converter, connected to a phase inverter, which converts the digital signal to a positive analog voltage. A phase inverter is connected to an output voltage reference terminal of the power supply unit, and inverts the phase of the analog voltage to produce a negative analog voltage that compensates voltage drop loss on a cable between the power supply and the load power-feed terminal.

Abstract: A radio-frequency system for a magnetic resonance apparatus has a local coil, a body coil, and an impedance adjusting shield. The body coil is wirelessly power-coupled with the local coil such that the body coil serves as a transmitting coil for radio-frequency signals and the local coil serves as a receiving coil for magnetic resonance signals. The local coil is disposed in an internal cavity of the impedance adjusting shield. An impedance of the local coil is adjusted by the impedance adjusting shield so as to match the impedance of the local coil and the body coil. The impedance adjusting shield has a frequency modulation element that adjusts the resonance frequency of the local coil. The body coil couples power to the local coil, and the impedance adjusting shield effectively reduces energy transmission efficiency loss caused by reflection, thereby improving energy transmission efficiency.

Abstract: A method for cooling an MRI apparatus and an MRI apparatus are provided. The MRI apparatus comprises a magnet, a primary cooling device and a secondary cooling device. The primary cooling device is in contact with the magnet and the secondary cooling device separately. The method comprises continuously monitoring the pressure of the magnet; turning off the secondary cooling device if the pressure is greater than or equal to a first preset pressure, less than a second preset pressure and in a rising state. The method and MRI apparatus can save electricity, and since the use duration of the secondary cooling device is also reduced, the lifespan of the secondary cooling device is prolonged, thus saving costs.

Abstract: Radio-frequency (RF) coil apparatus for magnetic resonance imaging has a base and an RF coil, wherein the base has a sliding base guide structure and a guide cavity, the RF coil has a sliding coil structure fitting the sliding base guide structure, and an electric cable of the RF coil is accommodated in the guide cavity and can move in the guide cavity. One end of the electric cable is fixed to the RF coil by a first fixing bracket, and another end of the electric cable is fixed to the base by a second fixing bracket so that a predetermined length of the cable projects from the base.

Abstract: In a method and apparatus for magnetic resonance imaging preview and establishing an MR model, an MRI scanner is controlled so as to execute an MR model scan sequence to perform an MRI scan of a designated patient, to obtain an MR model of the patient. One type of scan sequence is sequentially selected from all types of scan sequence supported by the MRI device, and one parameter set is sequentially selected from at least one parameter set supported by this type of scan sequence. The selected sequence and the selected parameter set are used to subject the MR model to a virtual MRI scan, to obtain an MR preview image corresponding to the selected sequence and the selected parameter set for the sequence C. This is repeated for all types of scan sequence supported by the MRI scanner and all parameter sets supported by each type of scan sequence. An MR model of a patient can thereby be established, and MR images of the patient to be previewed quickly, before an MRI scan of the patient is actually begun.

Abstract: In a method and magnetic resonance (MR) apparatus for heart diffusion imaging, when an ECG trigger signal by a computer that operates an MR scanner, the MR scanner is operated to acquire a navigator echo before a stimulated echo sequence, in order to detect diaphragm position information. When the first diaphragm position information is not located in an acquisition window, the stimulated echo sequence is not executed, and the computer waits to receive the next ECG trigger signal. The detection time of the navigator echo after the stimulated echo sequence as well as the acquisition time of the stimulated echo sequence, are thus eliminated when the first diaphragm position information does not meet requirements, so can significantly reduce scanning time, and increase the image SNR.

Abstract: A control computer for a magnetic resonance imaging system has an analog-to-digital conversion array, a multiplexer array connected to the analog-to-digital conversion array, and a control module that receives at least one input signal via the multiplexer array and the analog-to-digital conversion array. A signal processing board for a magnetic resonance imaging system has a substrate with the aforementioned components thereon that form the aforementioned control computer.

Abstract: A tensioning apparatus for supporting a low-temperature apparatus in a vacuum vessel of a superconducting magnet of a magnetic resonance imaging apparatus, has a main body that has a fixed end for fixing the main body, and a free end, a locating piece, situated between the fixed end and the free end; and an adjusting piece having a supporting part, supported between the free end and the locating piece, and an operating part, connected to the supporting part, and operable for adjusting the length of the supporting part in the direction of extension of the main body and thereby tensioning the main body.

Abstract: In a method and medical equipment for selecting a scanning protocol set, a preset virtual scanned object model including multiple scanned areas is loaded into a computer. The virtual scanned object model is a graphic or image model. A scanned area is selected by use of the virtual scanned object model. A default scanning protocol is set corresponding to the selected scanned area according to a preset correlation between the scanned area and the scanning protocol set, so as to complete the selection of the scanning protocol set.

Abstract: A thermal radiation shield for a superconducting magnet has an inner tube, an outer tube arranged around the periphery of the inner tube, and an annular end cap disposed therebetween, and connected in a fixed manner to an edge of the inner tube by an inner edge of the annular end cap. A first toothed part is formed at an outer edge of the annular end cap, the first toothed part being connected by meshing with a second toothed part formed by an edge of the outer tube. The annular end cap with a toothed structure allows only a simple cutting process on raw material to be performed in order to obtain the annular end cap and the first toothed part formed at the outer edge thereof, thereby avoiding complex punching, spinning and similar processes, and saving production costs.

Abstract: A supported pot magnet has a magnet coil and a coil former, with the coil former being made of a non-metallic material having a thermal contraction coefficient the same as that of the magnet coil. The supported pot magnet also has a cooling circulator composed of two identical separate components with a semi-cylindrical shape, each having multiple cooling tubes, a refrigerant inlet tube, a refrigerant outlet tube, and multiple clamps. The cooling tubes have a semicircular shape and mate with the slots, and are provided thereon with heat conducting members that are vertically disposed at an inner side of the cooling tubes. The refrigerant inlet tube and outlet tube are vertically mounted at two ends of the cooling tubes, in communication with the cooling tubes. The clamps are disposed on the refrigerant inlet tube and outlet tube.