A portable magnetic resonance imaging (MRI) system and methods, involving a magnet configured to generate a magnetic field, the magnet being a portable magnet transportable on a cart, and at least one coil assembly disposed in relation to the magnet, the at least one coil assembly having at least one gradient coil.

Methods, devices, and systems for data monitoring are provided. In one aspect, a method of data monitoring, applicable to a magnetic resonance system, includes: obtaining radio frequency (RF) waveform information which is to be sent to an RF transmitting coil of the magnetic resonance system; extracting target waveform information within a current sliding window from the RF waveform information, with a current time point being located within the current sliding window; obtaining, based on the target waveform information, target magnetic flux densities corresponding to the current sliding window; and determining a current real-time specific absorption rate (SAR) based on the target magnetic flux densities.

The present disclosure provides a system for active noise cancellation for a subject placed in a scanning bore of a medical imaging apparatus. The system may be directed to perform operations including obtaining a real-time position of each of at least one target portion of a subject; obtaining signals from one or more arrays of noise detection units surrounding the subject; and directing, based on the signals obtained from the one or more arrays of noise detection units, one or more arrays of denoising units to produce a sound to counteract noise at the real-time position of each of the at least one target portion of the subject.

An automatic protocolling system and methods involving a processor operable by way of a set of executable instructions storable in relation to a nontransient memory device, the set of executable instructions configuring the processor to: receive information relating to an initial protocol comprising an initial ordering of a plurality of sequences, the information comprising data relating to an interaction extent value of at least one of an imaging system and a patient as a function of time corresponding to each sequence in the plurality of sequences, the data relating to a time-integrated effect of each sequence in the plurality of sequences; and dynamically determine an alternative protocol comprising an alternative ordering of the plurality of sequences based on the time-integrated effect, whereby an alternative protocol is provided.

A system to perform magnetic resonance imaging includes a transmit coil that has a plurality of transmitters. The transmit coil is configured to receive at least a portion of an implant that is within a pediatric patient. The system also includes a controller operatively coupled to the transmit coil. The controller is configured to identify a region within the transmit coil with zero electric field while the transmitters are transmitting. The controller is also configured to rotate the transmit coil around the pediatric patient such that the implant is located within the region with zero electric field to avoid radio frequency heating of the implant.

The present disclosure relates to an un-motorized coiling mechanism for cable handling in medical scanning. A medical scanner accessory system for a medical scanner is disclosed. The medical scanner accessory system comprises a base part; a drum part rotatably connected to the base part, the drum part having a rotation axis and configured for accommodating an electronic device; a coiling mechanism comprising a first coiling part and a second coiling part; an elastic cord with a first point attached to the base part and a second point attached to the drum part, wherein the elastic cord is coiled on the coiling mechanism; and a cable comprising a jacket, wherein the cable has a first connector at a first end and a second connector at a second end thereof, wherein the first connector is connectable to a movable part of the medical scanner and the second connector is connectable to the electronic device, wherein the cable is coiled on a first part of the drum part, wherein the elastic cord is configured to apply a force to the drum part for rotating the drum part in a coiling direction of rotation about the rotation axis thereby coiling the cable on the first part of the drum part.

A system and method is provided for magnetic resonance imaging (MRI) guided respiratory gated radiotherapy using a respiratory motion model. MRI-guided respiratory gating is performed with a continuously updated model that represents a patient's internal anatomy as a mathematical function of an external respiratory surrogate. The motion model may be built and updated by acquiring images of a tissue in a subject and measuring, using the images, a position of the tissue in the images to determine motion of the tissue. The surrogate respiratory signal is acquired contemporaneously with acquiring the images. Motion of the tissue and the surrogate respiratory signal are correlated to create the motion model for the subject and gating a radiotherapy system may then be based upon the motion model. A multi-planar model-based respiratory gating may also be performed by sequentially imaging a stack of adjacent slice positions.

In a Method and a device for magnetic resonance imaging of a subject using a spoiled gradient echo sequence, a B.sub.0 magnetic field strength of at most 1.5 T is used during the sequence. As part of the sequence a slice select gradient acting as a spoil gradient is played out. Substantially simultaneously with the slice select gradient a predetermined RF pulse is played out in the sequence, wherein a time-bandwidth product of the RF pulse is set so that a majority of the energy of the RF pulse is transmitted in its central main lobe.

In a method for improving the contrast of magnetization-transfer-prepared magnetic resonance imaging (MRI), an acquisition scheme comprising a plurality of inversion-recovery (IR)-imaging modules in an interleaved arrangement is selected, a number of magnetization-transfer (MT)-preparation modules is selected, a pulse sequence is generated by arranging at least one MT-preparation module of the number of MT-preparation modules between two successive IR-preparation modules of the interleaved IR-imaging modules or in front of the first IR-preparation module of a group of interleaved IR-imaging modules, and the pulse sequence for an MRI examination is applied or saved. Each IR-imaging module may include an IR-preparation module and a slice acquisition module.

The present invention relates to an apparatus (10) for detection of peripheral nerve stimulation. The apparatus comprises an input unit (20); at least one sensor (30); a processing unit (40); and an output unit (50). The input unit is configured to provide the processing unit with information on individual scans of a scan sequence of a Magnetic Resonance Imaging “MRI” unit being used to perform medical imaging of a patient. The at least one sensor is configured to acquire sensor data of the patient undergoing the medical imaging. The processing unit is configured to determine a presence of peripheral nerve stimulation “PNS”, wherein the determination of the presence of PNS comprises utilization of the information on the individual scans of the scan sequence and the sensor data of the patient. The output unit is configured to output an indication that the presence of PNS has been determined.