Abstract: An imaging device is provided. The imaging device includes: one or more imaging sources; and a plurality of detectors combined by joining, the plurality of detectors being configured to receive one or more imaging beams emitted by the one or more imaging sources.

Abstract: A slip ring assembly includes a base body, at least one first conductor, and at least one second conductor. The base body is configured to have an annular shape and adapted to be made of an insulating material, and the base body includes a first side and a second side opposite to the first side along an axial direction of the base body. The first conductor is configured to have an annular shape and adapted to be fixed on the first side or the second side. The second conductor is configured to have an annular shape and adapted to be fixed on the first side or the second side. The first conductor and the second conductor are electrically insulated, and a projection of the first conductor and a projection of the second conductor along the axial direction of the base body at least partially overlap.

Abstract: According to an aspect of the present disclosure, a beam control device for radiotherapy is provided. The beam control device may include an electron beam generator configured to emit an electron beam for radiotherapy toward a subject in a first direction. The beam control device may further include a first deflection device configured to generate a defocused electron beam by defocusing the electron beam in a second direction, the second direction being different from the first direction.

Abstract: A slip ring assembly includes: at least one first conductor group, and at least one second conductor group. Each first conductor group includes a first conductor and a second conductor, and the first conductor and the second conductor are configured as annular shapes, respectively. Each second conductor group includes a third conductor and a fourth conductor, the third conductor and the fourth conductor are configured as annular shapes, respectively. The first conductor, the second conductor, the third conductor and the fourth conductor are arranged to be apart from each other. A first current having a first phase and a first amplitude is configured to flow through the first conductor, a second current having a second phase and a second amplitude is configured to flow through the second conductor, a third current having a third phase and a third amplitude is configured to flow through the third conductor.

Abstract: A radiation system is provided. The radiation system may include a bore accommodating an object, a rotary ring, a first radiation source and a second radiation source mounted on the rotary ring and a processor. The first radiation source may be configured to emit a first cone beam toward a first region of the object. The second radiation source may be configured to emit a second beam toward a second region of the object, the second region including at least a part of the first region. The processor may be configured to obtain a treatment plan of the object, the treatment plan including parameters associated with radiation segments. The processor may be further configured to control an emission of the first cone beam and/or the second beam based on the parameters associated with the radiation segments to perform a treatment and a 3-D imaging simultaneously.

Abstract: The present invention relates to a polypeptide and application thereof in preparation of an anti-fibrosis drug. The polypeptide of the present invention has an amino acid sequence as shown in SEQ ID NO. 1. The polypeptide of the present invention has good cell penetrability, can efficiently enter target cells, can permanently exist in a target organ after reaching the target organ, and has no obvious toxic or side effect in an effective dose range; can effectively inhibit a classic signaling pathway of fibrosis, thereby inhibiting expression of proteins, such as fibrosis markers and extracellular matrices; and can effectively inhibit fibrosis of a target organ and improve functions of the target organ. A new drug and a solution are provided for clinical treatment of fibrosis diseases, and the polypeptide has important significance for improving a clinical treatment effect of the fibrosis diseases and improving life quality of patients.

Abstract: The present disclosure may provide a radiation system including a first rotation portion, a second rotation portion, a treatment head, one or more imaging sources, and at least one detector. At least a portion of the treatment head may be disposed in the first rotation portion. At least one of the one or more imaging sources may be disposed in the second rotation portion. The second rotation portion may be able to rotate independently from the first rotation portion.

Abstract: The present disclosure may provide a radiation system. The radiation system may include a treatment head, a detector, a plurality of imaging sources, and a gantry. The treatment head, the detector, and the plurality of imaging sources may be mounted on the gantry. The treatment head may be configured to deliver a treatment beam toward an object. The plurality of imaging sources may be configured to deliver a plurality of imaging beams toward the object. At least two of the plurality of imaging sources may share the detector. The detector may be configured to detect at least two of the plurality of imaging beams. The detected at least two imaging beams may be emitted by different imaging sources of the at least two imaging sources.

Abstract: A radiotherapy apparatus includes a shielding cabin and a radiation delivery device. The shielding cabin is configured to shield radiation and has a treatment site disposed therein. The radiation delivery device is movably housed within the shielding cabin, and configured to generate treatment radiation and direct the treatment radiation to a target position at the treatment site.

Abstract: An apparatus for photon flash treatment, a method for photon beam formation, and a computer readable storage medium are provided. The apparatus includes an electron beam emitter, a deflection member, a deflection mechanism, and a radiation delivery device. The electron beam emitter is configured to emit an accelerated electron beam. The deflection member can perform first deflection processing on the accelerated electron beam. The deflection mechanism is configured to receive the electron beam after the first deflection processing, and perform second deflection processing on the electron beam after the first deflection processing. The radiation delivery device is configured to form a photon beam by receiving the electron beam after the first deflection processing or after the second deflection processing.

Abstract: The present disclosure provides a treatment system including a radiotherapy device, a magnetic resonance imaging (MRI) device, and a support. The radiotherapy device is configured to emit a radiation beam. The MRI device may include a magnet assembly for providing a magnet field in an accommodation space. The support may be configured to be connected with the radiotherapy device, and the radiotherapy device may be configured to rotate around at least one rotation axis.

Abstract: A method for positioning an object positioned on a table is provided. The method may include: obtaining a plan image, the plan image illustrating a virtual surface of the object; obtaining, by one or more capture devices, a 3-dimensional (3D) image, the 3D image including a set of elements corresponding to the object; obtaining a registration result by registering the plan image and the 3D image; determining whether the object needs to be moved based on the registration result; and in response to a determination that the object needs to be moved, causing the object to move according to the registration result.

Abstract: The present disclosure is directed to a radiation therapy system. The radiation therapy system may comprise a magnetic resonance imaging (MRI) apparatus. The MRI apparatus may include a plurality of shielding magnetic coils, the plurality of shielding magnetic coils being arranged around an axis. The radiation therapy system may also comprise a radiation therapy apparatus, which includes a linear accelerator configured to accelerate electrons to produce a radiation beam, the linear accelerator being located between two neighboring shielding coils of the plurality of shielding coils, and a length direction of the linear accelerator being parallel with the axis. The radiation therapy apparatus may also include a deflection magnet configured to deflect the electrons emitted from the linear accelerator by a deflection angle in a first portion of a moving trajectory, the first portion of the moving trajectory being on a plane intersecting with a radial plane of the MRI apparatus.

Abstract: An electron beam treatment device, a method for electron beam flash therapy, and a system for flash therapy are provided. The electron beam treatment device includes an electron beam emitter, a first deflection member, and an annular deflection mechanism. The electron beam emitter is configured to configured to emit a high-energy electron beam. The first deflection member can perform first deflection processing on the high-energy electron beam passing through the first deflection member. The annular deflection mechanism is configured to receive the high-energy electron beam deflected by the first deflection member, and perform second deflection processing on the high-energy electron beam, so that the high-energy electron beam is emitted towards a target region.

Abstract: The present disclosure generally relates to a multi-leaf collimator. The multi-leaf collimator may include a set of leaves installed in a cavity, each leaf of the set of leaves having a length along a first direction. At least a portion of the set of leaves may extend beyond the cavity along the first direction. The set of leaves may be arranged along a second direction, the second direction being different from the first direction. A length of a target leaf of the set of leaves may be less than a length of a reference leaf of the set of leaves. The target leaf may be located in an end portion of the set of leaves along the second direction. The length of the set of leaves may conform to the shape of a maximum therapeutic radiation field.

Abstract: The present application relates to a method and an apparatus for training machine learning models, a computer device, and a storage medium. The method includes: acquiring a first training sample set and a second training sample set; performing, based on the first training sample set, multiple rounds of model training, to obtain a first machine learning model; and performing, based on the second training sample set, multiple rounds of model training, to obtain a second machine learning model. At least a part of the first machine learning model has a same structure as at least a part of the second machine learning model, at least a part of model parameters of the second machine learning model is used when the first machine learning model is trained, and at least a part of model parameters of the first machine learning model is used when the second machine learning model is trained.

Abstract: The present disclosure relates to a system and a method. The system may include a magnetic resonance imaging (MRI) apparatus configured to acquire MRI data with respect to a region of interest (ROI) and a therapeutic apparatus configured to apply therapeutic radiation to at least one portion of the ROI. The MRI apparatus may include a plurality of main magnetic coils arranged coaxially along an axis, a plurality of shielding magnetic coils arranged coaxially along the axis, and a cryostat in which the plurality of main magnetic coils and the plurality of shielding magnetic coils are arranged.

Abstract: Embodiments of the present disclosure provide a radiotherapy system, comprising a first imaging component, a second imaging component, and a treatment component. The first imaging component and second imaging component may be used to determine a target region of an object and/or to guide an emission of treatment rays. The treatment component may be used to emit the treatment rays toward the target region. An isocenter of the treatment component may coincide with an isocenter of the second imaging component.

Abstract: The present disclosure is related to a microwave source. The microwave source may include a cathode heater and a thermionic emitter. The cathode heater may include a first component, and a second component enclosing at least a portion of the first component. The thermionic emitter may be configured to release electrons when the thermionic emitter is heated by the cathode heater. At least a portion of the second component of the cathode heater may be in contact with the thermionic emitter.

Abstract: A method for positioning an object positioned on a table is provided. The method may include: obtaining a plan image, the plan image illustrating a virtual surface of the object; obtaining, by one or more capture devices, a 3-dimensional (3D) image, the 3D image including a set of elements corresponding to the object; obtaining a registration result by registering the plan image and the 3D image; determining whether the object needs to be moved based on the registration result; and in response to a determination that the object needs to be moved, causing the object to move according to the registration result.