Abstract: A system for performing magnetic resonance imaging (MRI) of a subject has a pulse sequence system that generates a pulse sequence and has a gradient system, a plurality of gradient coils, a radio-frequency system, and a plurality of RF coils. The pulse sequence system causes the subject to emit MR signals which are captured as k-space data. The system also has a k-space ordering processor that collects first k-space data and second k-space data, an MR signal modeler that generates a signal variation model, and a compensation module that applies the signal variation model to the second k-space data collected to produce compensated k-space data. A display processor reconstructs the compensated k-space data into an image of the subject. The compensated data accounts for variation in magnetization during the pulse sequence and k-space data collection to reduce artifacts in the images.

Abstract: A system and method for magnetic resonance imaging is provided. The method includes generating a main magnetic field through a region of interest (ROI), applying a slice selection gradient to an slice of the ROI, applying a plurality of RF pulses to the slice to generate a plurality of echoes, applying a first encoding gradient and a second encoding gradient on the echoes, and generating MR images based on the echoes.

Abstract: The present application discloses a gradient power amplifier debugging method and system. The method may comprise initializing a control unit of the gradient power amplifier debugging system; retrieving a characteristic output of the control unit; computing a load inductance parameter L according to the characteristic output; and adjusting the control parameter of the control unit according to the load inductance parameter L. The control unit may comprise a close-loop control sub-unit, or a feedforward control sub-unit. The characteristic output may be representative of the difference between an output signal and an input signal of the gradient power amplifier debugging system. The control parameter may comprise a proportional coefficient, an integral coefficient, or a cutoff frequency of the filter.

Abstract: An imaging device may include multiple magnetic coils to generate a magnetic field. Additionally, the imaging device may include an outer support affixed to at least one coil of the plurality of magnetic coils and an axial support between at least two coils of the plurality of magnetic coils, wherein the outer support and the axial support operatively share a load corresponding to the generated magnetic fields.

Abstract: In a method and computer for creating a pulse sequence for controlling a magnetic resonance (MR) tomography system to generate image data, raw MR data are acquired by exciting different transverse magnetizations in a number of sub-volumes of the subject, with a sequence of pulse iterations being executed that each prepare, excite and read out sub-volumes. The pulse iterations are designed so that a readout occurs when the pulse sequence is applied between a preparation of two spatially directly adjacent sub-volumes.

Abstract: A phase difference caused by eddy currents is determined for an MR system. First MR data is acquired with a first sequence by irradiating at least one RF pulse having an RF excitation pulse, importing a first test gradient during or after the RF excitation pulse, applying a read-out gradient, and acquiring the first MR data while the read-out gradient is switched, so the first MR data is acquired for at least one K-space line. Second MR data is acquired with a second sequence by importing a second test gradient during or after the RF excitation pulse, and applying the read-out gradient. The second MR data is acquired while the read-out gradient is switched, so the second MR data is acquired for the at least one K-space line. The phase difference per voxel is determined using the first MR data and the second MR data.

Abstract: In a method for acquiring magnetic resonance raw data for image-guided radiotherapy, a number of imaging goals are provided to a computer. For each imaging goal, a magnetic resonance imaging protocol is selected. For each selected magnetic resonance imaging protocol, a number of parameters for that protocol are adjusted according to the respective imaging goal. The resonance raw data are acquired with the magnetic resonance imaging protocol and their parameters.

Abstract: A process cartridge detachably mountable in an image forming apparatus includes a toner cartridge for accommodating a developer; a developer roller; and a driving force receiving assembly for receiving a driving force of the image forming apparatus and driving the developer roller to rotate; and further includes a first stopper and a second stopper provided at a bottom of the toner cartridge, and the first stopper and the second stopper being movable relative to the toner cartridge in a direction perpendicular to an axial direction of the driving force receiving assembly; and when the first stopper and/or the second stopper move, a driving force receiving head of the driving force receiving assembly is movable in an axial direction of the driving force receiving assembly. The process cartridge can realize separation and contact between a developer roller and an image forming apparatus.

Abstract: In one example, a development cycle of a binary ink developer, BID, is timed. Timing may be based on the length of a substrate in which the image is to be printed or the size of the image or the area to be printed with the ink associated to the BID.

Abstract: A belt deviation detection device detects lateral displacement of a rotary belt in a width direction of the belt. The belt deviation detection device includes a contact member in contact with the belt at a contact portion of the contact member, a biasing member configured to bias the contact member toward the belt to press the contact member against the belt, and a displacement detector configured to detect the displacement of the belt in the width direction of the belt. The contact member is configured to track the displacement of the belt in the width direction of the belt. The contact member is made of a metal material, and a hardening treatment is applied to at least the contact portion of the contact member.

Abstract: This invention provides a NMR multi-dimensional method for measuring coupling constants within several coupling networks. At first, a 90° hard pulse was performed to flip the magnetization from the Z axis to the XY plane. After t1/2, a selective 180° pulse is implemented with a simultaneous Z-direction gradient, thus reversing different protons at different slices. Then the PSYCHE element is implemented. After another t1/2, the gradient G1 and Gp are implemented. At last, the EPSI readout is used to simultaneously record both the chemical-shift and the spatial information. As a result, from different specific slices, we can extract the scalar couplings between the proton reversed at this slice and other protons. These couplings lead to splittings in the indirect dimension, from which relevant coupling constants can be measured.

Abstract: According to a first aspect of the present invention, there is provided a toner cartridge detachably mountable to a receiving device, the toner cartridge comprising a container including a accommodating portion for accommodating the toner and a discharge opening for discharging the toner from the accommodating portion into the receiving device; and an open/close member including a closing portion for closing the discharge opening and an engaging portion movable relative to the closing portion, the open/close member being rotatable relative to the container between (a) an opening position for causing the closing portion to open the discharge opening and (b) a closing position for causing the closing portion to close the discharge opening, wherein the engaging portion is movable relative to the closing portion between (c) a engaging position for engagement with the receiving device to receive a force for moving the open/close member from the opening position to the closing position when the toner cartridge is d

Abstract: In a magnetic resonance method and apparatus, deficiencies in conventional masking in quantitative susceptibility mapping (QSM) are addressed by the inclusion of an additional step in the conventional QSM post-processing pipeline. In this additional step, atlas-based segmentation techniques, which have been developed for morphological applications such as T1w MPRAGE are used in order to provide the mask. This mask is then fed to the remainder of the QSM post-processing pipeline.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a receiving unit and a determining unit. The receiving unit collectively receives settings of an imaging region on an image of a subject with respect to at least part of imaging protocols in a series of imaging protocols performed in an examination. The determining unit determines the propriety of the setting with respect to each imaging protocol included in the part of the imaging protocols before imaging is started using the part of the imaging protocols.

Abstract: An image forming apparatus includes a counter that counts number of sheets of paper on which printing is performed; a calculator that calculates a coverage rate of each sheet of the paper; a derivation part that derives a reference line to be a replacement indicator for a consumable part based on replacement history information including: number of printed sheets from start of using the consumable part provided in the image forming apparatus until replacement of the consumable part; and an average coverage rate obtained by averaging coverage rates on the sheets of the paper corresponding to the number of printed sheets, and a communicator that provides a notification of arrival of replacement timing of the consumable part based on the reference line.

Abstract: A method and a system for measuring and calibrating an imaging magnetic field in a magnetic resonance apparatus are provided. The method includes: providing the imaging magnetic field, where the imaging magnetic field is adapted for scanning an object; sampling a signal corresponding to the imaging magnetic field; processing the signal to obtain an actual magnetic field intensity; and calibrating based on a difference between the actual magnetic field intensity and a target magnetic field intensity. The system includes: a magnetic component, adapted for scanning an object to be imaged; a sampling unit, adapted for sampling a signal corresponding to the imaging magnetic field; a processing unit, adapted for processing the signal to obtain an actual magnetic field intensity; a calibration unit, adapted for calibrating based on a difference between the actual magnetic field intensity and a target magnetic field intensity; and a control unit, adapted for controlling the system.

Abstract: The purpose of the present invention is to make it possible to use a wider uniform magnetic field space and to achieve an additional use mode for a bulk magnet structure. A bulk magnet structure according to the present invention is provided with a plurality of oxide superconducting bulk bodies arranged so that the central axes thereof are on the same line and at least one outer circumferential reinforcing ring fitted to the bulk magnet structure so as to cover the outer circumferential surfaces of the plurality of oxide superconducting bulk bodies. The plurality of oxide superconducting bulk bodies includes a columnar oxide superconducting bulk body and/or a ring-shaped oxide superconducting bulk body. At least one set of adjacent oxide superconducting bulk bodies are spaced apart from each other in the direction of the central axes thereof. The interior of the bulk magnet structure includes a space through which the central axes pass.

Abstract: Described here are systems and methods for magnetic resonance imaging (“MRI”) using a sweeping frequency excitation applied during a time-varying magnetic field gradient. As an example, a gradient-modulated offset independent adiabaticity (“GOIA”) approach can be used to modify the pattern of the sweeping frequency excitation. Data are acquired as time domain signals and processed to generate images. As an example, the time domain signals are processed using a correlation between a Fourier transform of the gradient-modulated sweeping frequency excitation and a Fourier transform of the time domain signals.

Abstract: An image forming apparatus includes an image bearing member, a developing unit to develop an electrostatic latent image formed on the image bearing member with toner, and a detachable toner container in which toner for supplying to the developing unit is contained. A measuring unit measures information relating to an amount of toner in the developing unit, and a determination unit determines an amount of toner in the developing unit based on the measured information.

Abstract: A developing device includes a housing, a developing roller, and a blade. The housing includes a developer chamber and an opening. The developing roller is disposed in the developer chamber, such that a part of the developing roller in a rotational direction thereof is exposed to an outside of the opening. The developer roller includes a sleeve rotatable around a shaft and a magnetic element. The magnetic element has a magnetic polarity opposite to that of a developer and is disposed at an entrance rotational position of the developer roller at which a sleeve region of the sleeve goes into the developer chamber from the outside of the opening. The blade is positioned near a surface of the sleeve to regulate a thickness of the developer on the surface of the sleeve. The thickness of the developer regulated on the sleeve region at the entrance rotational position by the blade is equal to or greater than 0.6 mm and equal to or less than 1.4 mm.