Abstract: The present disclosure falls into the field of medical apparatus, and discloses a radiation therapy apparatus and a beam imaging method, wherein the radiation therapy apparatus includes: a treatment head including multiple radiation sources distributed on one side of a target region, radiation beams emitted by the multiple radiation sources intersecting in the target region, and a lesion being located within the target region; a beam detector used for receiving a radiation beams passing through the lesion and emitted by the radiation sources to acquire projection data of each radiation beam passing through the lesion, and generating a slice image of the lesion according to the acquired projection data; and a processor used for constructing an image of the lesion in the target region based on the slice image generated by the beam detector.

Abstract: Provided is a tumor tracking method including: acquiring a detection image when a first ray source is located at a first detection point; determining, from a first reference image sequence in a preset image library, a first reference image corresponding to the detection image; acquiring, from a second reference image sequence corresponding to the first reference image sequence in the preset image library, a second reference image determined at the same time point as the first reference image; and determining a position of a tumor relative to a second ray source according to the second reference image.

Abstract: Disclosed is a method for detecting installation of a collimator of radiotherapy equipment. The method includes: acquiring a projection to be detected of a beam passing through the collimator and an isocentric plane of the radiotherapy equipment in sequence on a ray detector; comparing the projection to be inspected with a reference projection, and determining an installation deviation of the collimator of the radiotherapy equipment based on a deviation between the projection to be detected and the reference projection.

Abstract: Provided is a method for checking consistency between a radiotherapy equipment isocenter and a treatment isocenter, wherein the method includes: acquiring projection data from a detector and generating image data based on the projection data, wherein the image data includes a light spot and a shading located in the light spot, and the light spot and the shading are formed by a radiation beam generated by a treatment head of the radiotherapy equipment and then being blocked by a radiation blocking body; and determining an offset between the radiotherapy equipment isocenter and the treatment isocenter based on the image data. A system and a device for checking consistency between a radiotherapy equipment isocenter and a treatment isocenter are also provided.

Abstract: Provided is a method for acquiring labeled data, including acquiring a 3D-3D registration sample, wherein the 3D-3D registration sample includes a sample 3D image, a reference 3D image and 3D-3D registration data, and the 3D-3D registration data includes correspondence data between the sample 3D image and the reference 3D image; generating at least one dual-2D-image based on the sample 3D image, wherein each dual-2D-image is a combination of 2D projection images of the sample 3D image in two different directions; and generating 2D-3D registration data corresponding to each dual-2D-image based on the 3D-3D registration data, wherein each 2D-3D registration data includes correspondence data between the dual-2D-image and the reference 3D image.

Abstract: A method and system of controlling a multi-leaf collimator, wherein steps of the method includes: receiving treatment data, and the treatment data includes position information of N treatment points, conformal position information of N treatment points and radiation field shapes of N treatment points; controlling a treatment head to a conformal position of a first treatment point, and controlling the multi-leaf collimator to begin to conform to a radiation field shape of the first treatment point so as to start a treatment of the first treatment point; controlling the treatment head to a conformal position of a Kth treatment point, and controlling the multi-leaf collimator to begin to conform to a radiation field shape of the Kth treatment point so as to start a treatment of the Kth treatment point; carrying out the described operations repeatedly until the conformation of the radiation field shape and the treatment of all treatment points are completed.

Abstract: Provided is a low-dose imaging method, including continuously acquiring projection data; generating a first image by processing the acquired projection data before a data volume of the acquired projection data reaches a preset volume, and displaying the first image; and generating a second image by processing the preset volume of projection data when the data volume of the acquired projection data reaches the preset volume, and displaying the second image.

Abstract: Embodiments of the present disclosure provide a monitoring system for a radiotherapy center. The system includes at least one radiotherapy center and a monitoring cloud platform. The monitoring cloud platform is connected to the at least one radiotherapy center, and is configured to obtain operating parameters of at least one target device in the at least one radiotherapy center in real time. The monitoring cloud platform is further configured to control the at least one target device according to the operating parameters of the at least one target device in the at least one radiotherapy center.

Abstract: A method for determining a CT system parameter: controlling a mould body to move between an X-ray source and a detection surface of a detector, and acquiring X-ray projections of the mould body during movement on the detection surface, wherein the mould body has a first plane and a second plane perpendicular to each other, and the first plane and the second plane are always perpendicular to the detection surface during the movement of the mould body; determining a first straight line and a second straight line according to the acquired X-ray projections; and determining an intersection point of the first straight line and the second straight line as a pedal coordinate of a focus of the X-ray source on the detection surface, a CT coordinate system parameter including the coordinates of the foot of the perpendicular.

Abstract: Systems and methods for packet re-transmission via a bi-directional wired interface between two devices are provided. A transmitter of a first device transmits one or more first transmit data packets to a second device over the bi-directional wired interface. Concurrently with the transmission of the one or more first transmit data packets, the first device receives, over the bi-directional wired interface, one or more second received data packets from the second device. A packet integrity monitor of the first device monitors whether one or more received data packets of the second received data packets is corrupted at the physical layer of the first device. In response to detecting that one or more received data packets of the second received data packets is corrupted, the first device re-transmits one or more transmit data packets of the first transmit data packets that was previously transmitted over the bi-directional wired interface.

Abstract: The present disclosure discloses a bowtie filter, a radiation scanning apparatus, and a radiation scanning method, and is used for improving the versatility of the bowtie filter, simplifying the operation of radiation scanning, and improving the efficiency of radiation scanning. The bowtie filter includes a filter body having at least two filter regions. Each of the at least two filter regions is in contact with or partially coincident with an adjacent filter region, and every two adjacent filter regions have different radiation compensation amounts. The radiation scanning apparatus includes a radiation source and the bowtie filter. The bowtie filter is disposed at a light outlet side of the radiation source, and each filter region of the bowtie filter corresponds to a different irradiation field of the radiation source.

Abstract: Provided is a setup method which can include: acquiring a position of a reference mark point provided on a noninvasive positioning device in an infrared coordinate system of an infrared positioning system; according to the position of the reference mark point in the infrared coordinate system, a relative position between the reference mark point and an image center point in an electronic scanning image, and a position of an isocenter of a radiotherapy equipment in a patient supporting device PSD coordinate system of the radiotherapy equipment, determining a first offset between the image center point and the isocenter in the PSD coordinate system; and adjusting the first offset to a first target offset by adjusting a position of a patient supporting device in the PSD coordinate system.

Abstract: An image guiding device can include a gantry, an imaging source, an imager, and an image server. The imaging source, the imager and the image server are all mounted on the gantry. The imager is connected to the image server. The imaging source is arranged to face the imager. The imaging source emits X-ray. The imager receives X-ray passing through an affected part of a patient, generates projection data based on the received X-ray, and sends the projection data to the image server. The image server processes the projection data to obtain an image of the affected part.

Abstract: Embodiments of the present disclosure provide a method and an apparatus of correcting a collimator, which may correct a position of a collimator of a gamma knife apparatus. The method includes: separately obtaining a projection image of rays sequentially passing through collimation holes and an isocenter plane in the collimator in cases where the collimator moves to M positions; determining a target position with a highest degree of alignment of the collimator from the M positions according to obtained projection images of rays; recording position parameters corresponding to the target position, so as to control the collimator to move to the target position in a case where the a gamma knife apparatus is used for treatment.

Abstract: A method and apparatus for position detection, and a radiotherapy system are provided. The radiotherapy system includes: a treatment couch, a positioning apparatus, an optical tracking system and a computer; the positioning apparatus disposed on the treatment couch, and at least one reference point provided on the positioning apparatus; the optical tracking system disposed above the treatment couch and configured to detect relative positioning between a mark point set on a treated part of a patient and the reference point, determine deviation between the relative and reference positions, and send the deviation to the computer. The computer is configured to determine whether to adjust a position of the treatment couch based on the deviation and deviation range. The system provided by the present disclosure avoids the influence of patient movement on the accuracy of treatment, and prevents a treatment beam from damaging normal tissues of the patient.

Abstract: Embodiments of the present disclosure provide a positioning method and apparatus, and a radiation therapy system. The positioning method comprises: acquiring a current gamma angle before radiation beams of a radiation source illuminate a treatment body part; acquiring a reconstructed image corresponding to the current gamma angle, the reconstructed image being an image reconstructed according to an image of the treatment body part acquired in advance; acquiring an IGRT image of the treatment body part corresponding to the current gamma angle, the IGRT image being an image generated by an image guide system; and comparing the reconstructed image with the IGRT image to obtain a deviation of the position of the treatment body part, and sending out the deviation, so that the position of the treatment body part is adjusted according to the deviation when the deviation is greater than a preset threshold.

Abstract: The present disclosure discloses a radiation treatment plan generation method, which is applied to a therapeutic equipment comprising at least two therapeutic heads. The method comprises the steps of: acquiring images of an area of the patient with a tumor; determining a treatment target region including the tumor as a region for being irradiated with a radiation beam upon radiotherapy; obtaining a prescription dose of the treatment target, wherein the prescription dose comprises a parameter of prescription dose value that is a magnitude of a dose received by the tumor; and determining a therapeutic head, a therapeutic approach and a therapeutic drive approach suitable for irradiating the target region, based on the therapeutic target region and the prescription dose thereof.

Abstract: An apparatus for controlling a radiation therapy device includes a drive module, a control module and an input module. The drive module and the control module are connected with the input module, respectively. The input module is configured to acquire a first arc-shaped trajectory. The drive module is configured to drive a radiation therapy head to move along the first arc-shaped trajectory at a first speed. The control module is configured to control the radiation therapy head to emit rays and form a radiation field, the radiation field includes at least one sub-radiation field, and the first speed is smaller than a preset speed threshold. The radiation therapy head performs a circumferential movement. A circumferential trajectory along which the radiation therapy head moves includes at least two first arc-shaped trajectories, and any two first arc-shaped trajectories are discontinuous.

Abstract: A tumor tracking method is provided. The method includes: acquiring a tumor image at an Nth moment; determining a two-dimensional positional deviation of a tumor at the Nth moment according to the tumor image at the Nth moment and a tumor reference image corresponding to the tumor image at the Nth moment; determining a three-dimensional positional deviation of the tumor at the Nth moment according to the two-dimensional positional deviation of the tumor at the Nth moment and a predetermined two-dimensional positional deviation of the tumor at an (N?1)th moment; and tracking the tumor according to the three-dimensional positional deviation of the tumor at the Nth moment.

Abstract: A multi-leaf collimator includes a driving component, a controller and n leaf-group layers, where n is an integer greater than or equal to 2, wherein each leaf-group layer includes one group of leaves or two opposing groups of leaves, each group of leaves includes a plurality of leaves, each of the leaves includes a front end surface and a rear end surface which are opposite to each other, and each of the leaves is movable so that the front end surfaces of the leaves in the multiple leaf-group layers form a variable-shaped region that allows beams to pass through; and the rear end surface of the leaf is connected to the driving component, and the controller is configured to control the driving component to drive the leaf to move.