57 results about "Isocenter" patented technology

The present disclosure relates to a target volume tracking method and a computer device. The method includes: determining an isocenter location corresponding to the target volume in a scout image of an object, and obtaining the spatial position of the treatment head in the radiotherapy device, and then determining the at least one slice on the scout image based on the isocenter location and the spatial position, so as to control the magnetic resonance scanner to radiate a RF pulse which excites the at least one slice to obtain a tracking image of the object; the tracking image includes the target volume.

The invention discloses a radiotherapy equipment image guiding device and method and related equipment, and relates to the technical field of radiotherapy, and the device comprises a ray generation module which is provided with a ray source and is arranged at one side of a treatment room isocenter; the radiation source is used for moving along a first preset path; the ray source is used for emitting rays, and the rays penetrate through a patient; the detection and acquisition module is provided with a detector, is arranged on the other side of the isocenter of the treatment room and is distributed opposite to the ray source along the isocenter; the detector is used for moving along a second preset path, collecting rays penetrating through the patient and converting the rays into corresponding projection images; the registration module is used for performing registration on the projection image and a planned CT image by executing a first registration mode or a second registration mode so as to calculate a positioning deviation; and the first preset path and the second preset path are straight lines, so that the adaptability, precision and stability of radiotherapy are improved.

The invention provides a robot treatment bed positioning error correction method. The method comprises three steps of coordinate system establishment and calibration, positioning error detection and calculation and error correction. A first reflection target ball is installed at an angular point of a treatment bed, a high-precision optical positioning system is used for obtaining coordinates of a radiotherapy isocenter point, and a conversion relation between a base coordinate system and an optical positioning system coordinate system is established. Controlling the treatment bed to move to four non-coplanar feature points, collecting actual coordinates, comparing the actual coordinates with theoretical coordinates, calculating an error matrix of a base coordinate system, solving a target pose matrix, driving the robot treatment bed to adjust the tail end pose, and realizing accurate alignment of a treatment center and an isocenter. The method can detect and automatically compensate systematic pose deviation caused by mechanical wear in real time, has the advantages of high precision, high automation degree, correction from an error source and the like, and effectively guarantees long-term positioning precision and clinical safety of a radiotherapy system.

The present disclosure provides a cone beam computed tomography system for proton therapy comprising an x-ray source configured to generate x-rays and positioned to rotate around a patient at a treatment isocenter, a detector assembly positioned opposite the x-ray source and configured to receive x-rays that have passed through the patient, a rotation mechanism configured to rotate the x-ray source and the detector assembly around the patient while maintaining their relative positions, a translation mechanism configured to translate at least one of the x-ray source, the detector assembly, or a patient couch during rotation to implement a wobbled scan orbit, and a scatter rejection grid attached to the detector assembly and focused on the x-ray source to reduce scattered x-rays. The translation mechanism distributes missing projection data across multiple radii and angles, enabling improved reconstruction quality through iterative reconstruction methods.

This invention relates to a method for measuring the rotational accuracy of a rotating gantry, comprising: mounting a laser generator on a treatment head; mounting a calibration device on a treatment bed, the calibration device having a preset part; moving the treatment bed so that the preset part of the calibration device is located at the isocenter point of the rotating gantry; aligning the laser emitted by the laser generator on the treatment head with the preset part of the calibration device on the treatment bed; rotating the treatment head 180 degrees from its starting point and then back to its starting point, observing the positional relationship between the laser and the preset part during the rotation; and obtaining the rotational accuracy based on the positional relationship between the laser and the preset part. This method for measuring the rotational accuracy of a rotating gantry, through the positional relationship between the laser emitted by the laser generator and the preset part of the calibration device, can quickly measure the rotational accuracy of the rotating gantry, is simple to operate, and has a short measurement time.

Methods and systems for positioning and positioning a patient for irradiation therapy without fiducial markers. Platform settings including parameters of the patient support platform are obtained. Platform position data is obtained in which a patient is placed on a platform for imaging without fiducial markers, the platform position data including 3D coordinates of the platform relative to an imager coordinate system calibrated to a predefined fixed set of initialized coordinates in a treatment room. Target tissue is imaged with the patient on the platform. A treatment plan is generated based on the target tissue imaging. The treatment plan comprises a treatment radiation field of a treatment angle, and the treatment angle comprises a platform positioning parameter. When treatment is initiated, the patient is placed on the platform without fiducial markers according to the platform settings. In accordance with the treatment plan, the platform position data, and a coordinate system transformation of the imager coordinate system to the treatment room coordinate system, the platform is adjusted to position the patient at the placement position in the treatment room such that the target tissue is positioned at the isocenter of the treatment room.

A radiation treatment system includes a rotatable gantry that is configured to rotate about a treatment isocenter of the radiation therapy system, a treatment-delivering radiation source that is coupled to the rotatable gantry and directs a treatment beam through the treatment isocenter of the radiation therapy system, a first X-ray imager that is coupled to the rotatable gantry, and a second X-ray imager that is mounted on a component of the radiation therapy system and is fixed in position relative to a couch of the radiation therapy system while the rotatable gantry rotates about the treatment isocenter.

The application relates to a subject vertical positioning method, a subject vertical positioning device and a CT system. The method comprises the following steps: acquiring the position of an examination bed after the subject is positioned; determining a measurement range corresponding to the organ of the subject on the examination bed, the measurement range comprising a starting point and an ending point in the horizontal direction; during the movement of the examination bed towards a scanning frame, starting the measurement of the distance from the subject by a sensor attached to the scanning frame when the starting point reaches a measurement position of the sensor, and stopping the measurement when the ending point reaches the measurement position, and acquiring the height of the examination bed while the sensor is measuring; calculating the organ center height based on the measurement result of the sensor, the height of the sensor and the height of the examination bed, the height representing the average height of the organ in the vertical direction; and adjusting the height of the examination bed based on the organ center height, so that the adjusted organ center height is equal to the isocenter height of the scanning frame, so as to realize the effects of minimizing the radiation dose of the subject and improving the CT imaging quality.

An example radiation therapy system is described. The system includes a stationary support structure fixed to a support surface, a rotatable gantry with a treatment-delivering radiation source and at least one X-ray imager mounted thereon, and a couch-positioning system. The treatment-delivering radiation source directs a treatment beam through a treatment isocenter of the radiation therapy system. The rotatable gantry is rotatably coupled to the support structure and is configured to rotate about a bore of the radiation therapy system. The couch-positioning system is rotatably coupled to the support surface and the center of rotation is vertically aligned with the treatment isocenter.

We provide an isocenter evaluation technology that measures the position and size of the isocenter easily, quickly, and with high accuracy, minimizes the size, and achieves high reliability. The evaluation device (10) includes a laser tracker (15) that outputs a laser (30), a first probe (21) that is provided at three or more points on a support frame (25) and that reflects a first optical signal (11) when it receives the laser (30), a second probe (22) that is provided at three or more points on an intersection plane (36) of a beam (37) and that reflects a second optical signal (12) when it receives the laser (30), a calculation unit (16) that calculates a virtual point (38) of the isocenter based on information about the first optical signal (11), the second optical signal (12), and the radius R and rotation angle θ of the rotating frame (26), and a calculation unit (16) that calculates each of the calculated virtual points (38) of the isocenter by changing the rotation angle θ of the rotating frame (26). n It includes a recording unit 17 that records the data as point cloud data.

A control circuit identifies a plurality of radiation treatment arclets for a given radiation treatment platform and then identifies, for each of the plurality of radiation treatment arclets, a corresponding isocenter location within the patient. The foregoing can result in locating the platform isocenter at different locations within the patient during the course of a radiation treatment session for different ones of the arclets. A radiation treatment plan is optimized as a function of the plurality of arclets and their corresponding isocenter locations. By one approach, these teachings will include automatically dividing at least one initial template arc into at least two radiation treatment arclets. By one approach, identifying the corresponding isocenter locations for each of the plurality of radiation treatment arclets can comprise identifying the corresponding isocenter locations to maintain close proximity of a radiation treatment platform collimator to an exterior surface of the patient.

A system and method for a lidar guided patient positioning are described. An example imaging system includes a gantry having a bore, a table to move a subject relative to the bore, a radiation source mounted on the gantry and to emit an X-ray beam, and a detector to detect the X-ray beam. The system further includes a light detection and ranging (LiDAR) scanning system to acquire data of the subject. The system further includes processing circuitry to process the LiDAR data to generate a 3D point cloud representing a topography of the subject, estimate a center of a region of interest of the subject, calculate an offset of the center of the region of interest relative to an isocenter of the gantry, and adjust a height of the table based on the offset to align the center of the region of interest with the isocenter of the gantry.

The invention provides radiotherapy equipment, a calibration die body and a positioning lamp calibration method. The radiotherapy equipment comprises an annular rack, three positioning lamps and support assemblies in one-to-one correspondence with the positioning lamps. The three sets of support assemblies are arranged in the circumferential direction of the annular rack at intervals, and each positioning lamp is arranged on the corresponding support assembly and is adjustable in posture. The postures of the three positioning lamps meet the condition that one positioning lamp emits a positioning light beam corresponding to the sagittal plane of the human body, and the other two positioning lamps are oppositely arranged and respectively emit two positioning light beams which are perpendicular to each other and correspond to the cross section and the coronal plane of the human body one to one; and positioning light beams emitted by the three positioning lamps are intersected at a set virtual isocenter. According to the radiotherapy equipment, the positioning lamp is directly arranged on the annular rack of the radiotherapy equipment, so that the distance between the positioning lamp and the virtual isocenter is reduced, the moving distance of a user can be reduced in the process of debugging and calibrating the positioning lamp by the user, and the debugging and calibrating efficiency of the positioning lamp is improved.

The present disclosure relates to a radiotherapy device for delivering radiation to a subject. The device includes a radiation source configured to rotate about an isocenter and emit radiation in a radiation plane containing the isocenter. The device also includes a subject support surface including a portion configured to be located substantially at the isocenter. The subject support surface includes a subject support surface rotation mechanism configured to rotate the subject support surface about a rotation axis parallel to and spaced apart from an axis passing through the isocenter. The subject support surface also includes a first section configured to move from a first position to a second position along at least one of a longitudinal direction and a lateral direction. The device also includes a processor configured to control longitudinal and / or lateral movement of the first section as a function of rotation of the subject support surface to maintain the portion of the subject support surface substantially at the isocenter.

This invention proposes a radiotherapy device, method, and storage medium. The radiotherapy device includes a treatment gantry, a treatment bed, radiotherapy components, and a scanning imaging system. The scanning imaging system includes a scanning ring and a moving mechanism. The scanning ring is configured to rotate around its own axis and is equipped with the scanning imaging components. The moving mechanism connects the scanning ring and the treatment gantry and drives the scanning ring to move between an image acquisition position and a standby position. In the image acquisition position, the image isocenter coincides with the treatment isocenter or has a preset fixed deviation; in the standby position, the scanning ring is entirely outside the irradiation path of the treatment beam. This invention achieves the movement of the scanning ring between the image acquisition position and the standby position through the moving mechanism, ensuring diagnostic-grade imaging quality while avoiding interference between the treatment beam and the imaging components. This significantly improves the accuracy and reliability of image-guided radiotherapy and enhances the flexibility of treatment.

Provided is a particle beam measuring device that contributes to making work simpler and more efficient during beam adjustment, beam evaluation, or similar, as well as to saving space in a storage area for attachments or similar. This particle beam measuring device (10) comprises: a transport mechanism (40) that is for transporting a patient to the inside of a rotary gantry and causing an affected part of the patient to coincide with an isocenter through which a particle beam (11) passes; a phantom (20) on which the particle beam (11) is made to be incident for the purpose of measurement; and an attachment (30) that attaches the phantom (20) as an end effector of the transport mechanism (40).

The present disclosure may disclose methods and systems for treating an object. The method may include imaging an object fixed on a positioning device using an imaging device. The method may include obtaining a plan image of the object. The method may include generating information of a region of interest (ROI) of the object based on the plan image of the object. The method may include generating a treatment plan based on the information of the ROI. The treatment plan may include a plan isocenter on the plan image. The method may further include treating a target portion of the object based on the treatment plan using a treatment device. The object may be fixed on the positioning device from a moment that the object is started to fixed on the positioning device to an end of the treatment of the target portion.

An example radiation therapy system is described. The system includes a stationary support structure fixed to a support surface, a rotatable gantry that is rotatably coupled to the support surface and is configured to rotate about a bore of the radiation therapy system, a treatment-delivering radiation source that is coupled to the rotatable gantry and directs a treatment beam through a treatment isocenter of the radiation therapy system, and at least one X-ray imager that is coupled to the rotatable gantry and has an X-ray-receiving surface that is oriented at a non-orthogonal angle to X-rays received by the at least one X-ray imager.

Beam delivery and / or beam aiming subsystems included in a fast neutron therapy system. The beam delivery subsystem comprises a beamline having linear and curved portions. Quadrupoles along the beamline focus particles conveyed between an axled input and a neutron source (e.g., beryllium). A bend magnet(s) directs the particles to collide with the neutron source to release neutrons. A gantry (e.g., concrete, steel) includes an annular rim and opposing annular flanges that form a radial cavity and a perimeter “shield zone” channel. A collimator assembly (e.g., steel) projects radially inward from a slot void in the annular rim. A secondary collimator (e.g., steel, hydrogenous material) presents a barrel extending radially toward the gantry isocenter. The two collimators contour the neutrons into a high linear energy transfer (LET) beam. A drive rotates the gantry to set the delivery angle over approximately 360 degrees about the isocenter (e.g., patient table).

The invention discloses a multi-angle convergent proton beam transport device based on a fixed frame, which belongs to the technical field of proton radiotherapy systems and comprises a C-shaped fixed frame and a proton beam. The beam transport channel is vertically arranged on the C-shaped fixed rack, so that the proton beam can pass through the beam transport channel; the magnet module is fixedly connected with the C-shaped fixed rack and is located on the beam transportation channel; the adjusting module is arranged on the C-shaped fixed rack so as to control the magnetic force of the magnet module; and the treatment placement module is connected with the C-shaped fixed rack in a matched manner, so that the treatment position can be conveniently adjusted. According to the invention, the proton beams are focused at the same point from different angles, so that the high focusing and space matching of the proton beams at each incident angle at the isocenter are realized, the targeting advantage of the proton beams is fully played, and the proton beams are incident from multiple angles and multiple directions, so that the optimal irradiation coverage of the geometrical shape of a complex tumor is realized.

The radiation therapy system includes: a holding unit that holds first movement information that moves a top plate such that a first position of a lesion recognized based on first voxel data coincides with an isocenter of a beam to be administered to the lesion, and irradiation conditions of the beam; the irradiation condition of the beam is set so that the focus coverage of the patient based on the irradiation of the beam is maximum at the first position; a recognition unit that recognizes a second position of the lesion on the basis of second voxel data captured immediately before irradiation of the beam; and an update unit that updates the first movement information to the second movement information such that the focus coverage at the position of the focus of the patient is maximized without changing the irradiation condition.

The present disclosure provides a target real-time tracking control method and an electronic device, and belongs to the technical field of radiotherapy device control. The method comprises: acquiring a beam-out direction of a current treatment beam; constructing a follow-up coordinate system that changes with the beam view angle based on the beam-out direction, wherein the follow-up coordinate system takes the isocenter of the radiotherapy device as the origin, at least includes a first coordinate axis and a second coordinate axis perpendicular to each other, and the beam-out direction is perpendicular to the plane formed by the first coordinate axis and the second coordinate axis; determining the two-dimensional offset of the target on the first coordinate axis and the second coordinate axis, and controlling the radiotherapy device based on the two-dimensional offset. The present disclosure can accurately determine the two-dimensional offset of the target which has a significant influence on the treatment quality.

An example radiation therapy system is disclosed. The system includes a stationary support structure fixed to a support surface external to the radiation therapy system, a rotatable gantry that is rotatably coupled to the support surface and is configured to rotate about a bore of the radiation therapy system, a treatment-delivering radiation source that is coupled to the rotatable gantry and directs a treatment beam through a treatment isocenter of the radiation therapy system, and at least one X-ray imager coupled to the rotatable gantry by a mechanism that selectively positions the at least one X-ray imager between a first imaging position and a second imaging position with respect to the treatment isocenter.

An example radiation therapy system is described. The example includes a stationary support structure fixed to a support surface external to the radiation therapy system, a rotatable gantry with a treatment-delivering radiation source and at least one X-ray imager mounted thereon, and a conical truss for supporting the treatment-delivering radiation source and the at least one X-ray imager. The treatment-delivering radiation source directs a treatment beam through a treatment isocenter of the radiation therapy system, and the rotatable gantry is rotatably coupled to the support surface and is configured to rotate about a bore of the radiation therapy system.

The invention discloses a multifunctional radiotherapy positioning system and a positioning method thereof. The multifunctional radiotherapy positioning system comprises a multifunctional radiotherapy fixing bottom plate, a positioning frame arranged on the multifunctional radiotherapy fixing bottom plate, a positioning laser lamp detector installed on the positioning frame, a dynamic positioning calibration module, a non-contact monitoring module and an intelligent temperature control heating system. The multifunctional radiotherapy fixing bottom plate is used for being installed on a linear accelerator treatment bed. The multifunctional radiotherapy fixing bottom plate comprises a photochromic layer, a pressure sensor matrix layer, a temperature-sensitive layer, a heating layer, an upper carbon fiber skin layer, a foam layer and a lower carbon fiber skin layer which are sequentially stacked from top to bottom. The positioning laser lamp detector comprises a positioning laser lamp detector main body, a cross curve mark arranged on the surface of the positioning laser lamp detector main body, a laser sensor matched with the cross curve mark, and metal mark points which are arranged in the positioning laser lamp detector main body and are distributed around the isocenter.

A method, apparatus, device, and medium for isocenter point detection are disclosed, relating to the field of data processing technology. The method includes: with the gantry and radiator of a radiotherapy device both at initial angles, acquiring a first set of coordinates for multiple measurement points on the surfaces of the gantry and radiator; for each measurement point, performing the following: determining a second coordinate value of the measurement point after the radiator rotates by a target angle based on the first coordinate value of the measurement point through spatial coordinate transformation; determining a third coordinate value of the common intersection point after the gantry rotates by the target angle; determining a fourth coordinate value of the measurement point after rotation by superimposing the second and third coordinate values; generating a three-dimensional point cloud data set based on the fourth coordinate values ​​of multiple measurement points after rotation; and determining the center coordinates of the smallest envelope sphere as the dynamic isocenter point by calculating the smallest envelope sphere that encloses the three-dimensional point cloud data set. This provides a more comprehensive isocenter detection method, thereby increasing the reliability and safety of clinical treatment.

The invention relates to the technical field of radiotherapy and discloses an isocenter calibration device for radiotherapy, a radiotherapy system and a neutron therapy system.The isocenter calibration device comprises a shell, a die body and a laser calibration unit, the die body is arranged in the shell, and the laser calibration unit comprises a calibration point, a window and a scribed line unit calibration scribed line; the calibration point is located inside the die body, a plane intersecting with the calibration point is set as a projection plane, the window is arranged on the shell, and the projection shape of the window projected to the projection plane in the normal direction of the projection plane covers the calibration point; the scribing unit calibration scribed line comprises a first line and a second line which are arranged on the surface of the die body, and a third line and a fourth line which are arranged on the outer surface of the shell. According to the isocenter calibration device, the technical problem of how to accurately position the laser lamp can be solved, whether the laser lamp is in the isocenter position or not can be verified, and the levelness and perpendicularity of the laser lamp can also be verified.

Described herein are compact particle therapy systems comprising a superconducting cyclotron for proton therapy applications. In some aspects, an electromagnetic beamline incorporating energy selection systems and pencil beam scanning magnets directs particle beams from the cyclotron to a treatment isocenter. A patient positioning device comprising a robotic positioner with six degrees of freedom supports patient alignment, t. The particle system can be ultra compact and able to be installed in existing photon linear accelerator (e.g., radiation therapy) vaults.

Systems and methods are disclosed for optimizing a treatment plan using all degrees of freedom including those related to beam geometry parameters, the optimization including a step for limiting the search space for the beam geometry parameters using a trained machine learning model, and systems and methods are disclosed for obtaining beam geometry parameters for treatment planning that do not require knowledge of the beam delivery device isocenter.

The invention discloses a front movement collimation linkage control CT system and a control method.The CT system comprises an X-ray source, a front collimation assembly, a detector assembly, a patient support and a control unit, and the detector assembly is provided with a non-rectangular effective sensitive area and a non-sensitive area surrounding the effective sensitive area; the front collimation assembly comprises a Z-direction main blade and an X-direction auxiliary blade, the main blade is used for setting the isocenter coverage width, and the auxiliary blade is used for conducting fine cutting in an opening of the main blade; the patient support has X-direction preset positioning and mechanical locking functions; the control unit is configured to control the auxiliary blade in the scanning process, so that the projection boundary of the auxiliary blade on the detector is always located on the inner side of the non-sensitive area, and a preset safety belt is kept in the effective sensitive area. Through linkage control of conformal shielding of the non-rectangular detector, the X-direction auxiliary blade and X-direction preset positioning of the patient support, the imaging quality is guaranteed, and meanwhile the radiation dosage of the patient and invalid irradiation of the detector are remarkably reduced.