A ripple filter unit comprises a first and a second ripple filter, substantially identical, are arranged so that they overlap each other in a beam, with substantially the same orientation and movable relative to each other in such a way as to vary the filter characteristics dynamically. In this way, the modulation characteristics of the ripple filter unit can be varied.

Apparatus and methods to deliver kV X-rays toward a target lesion within a body including: a treatment anode configured to receive electron beams and output the kV X-rays through a specially-designed collimator; an electron beam source configured to generate and direct the electron beams toward the treatment anode; and at least one magnet configured to steer and scan the electron beams along the treatment anode to prevent overheating of the treatment anode. The components are mounted on a gantry that rotates about the target lesion to distribute the dose delivered over a large volume of healthy tissue while substantially maximizing the dose delivered to the target lesion.

To provide a particle beam therapy device that expands an irradiation field while avoiding an increase in size of a scanning unit or an irradiation device including the scanning unit. A shift unit 36 is provided downstream of a scanning unit 34. The shift unit 36 deflects a carbon beam as a particle beam to shift the irradiation field, thereby forming an expanded irradiation field. The shift unit 36 includes a first shift electromagnet 42 that shifts the irradiation field in a Y direction and a second shift electromagnet 44 that shifts the irradiation field in an X direction. The scanning unit is dynamically controlled, and the shift unit 36 is statically controlled.

Systems and methods provide a radiotherapy treatment by focusing an electron beam on an x-ray target (e.g., a tungsten plate) to produce a high-yield x-ray output with improved field shaping. A modified electron beam spatial distribution is employed to scan the x-ray target, such as a 2D periodic beam path, which advantageously lowers the temperature of the x-ray target compared to typical compact beam spatial distribution. As a result, the x-ray target can produce a high yield x-ray output without sacrificing the life span of the x-ray target. The use of a 2D periodic beam path allows a much colder x-ray target functioning regime such that more dosage can be applied in a short period of time compared to existing techniques.

A dose rate-volume histogram can be generated for a target volume. The dose rate-volume histogram can be stored in computer system memory and used to generate a radiation treatment plan. The radiation treatment plan can be used as the basis for treating a patient using a radiation treatment system.

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.

A jaw position detection apparatus is configured to detect position information of at least one jaw moving in an arc, and includes a connecting component, a conversion mechanism, and a displacement sensor. The connecting component is fixed on a jaw. The conversion mechanism is connected to the connecting component, and the conversion mechanism is configured to convert an arc motion of the connecting component into a linear motion when the connecting component moves in an arc with the jaw. The displacement sensor is connected to the conversion mechanism, and configured to detect displacement information of the linear motion of the conversion mechanism.

A particle beam therapy system delivers a particle beam for particle radiation therapy to a target volume in a patient from different treatment angles. The particle beam enters an active static magnetic field region perpendicularly to a magnetic field. Magnets and/or coils generate a cylindrically shaped magnetic field system with magnetic fields oriented axially in the magnetic field system. The active magnetic field region has an outer radial guiding field region and an inner radial bending field region, with an arc scan magnet system at an outer edge, a first number of coils generating a static magnetic guiding field that is predominantly effective in the outer radial guiding field region, and a second number of coils predominantly effective in an inner radial bending field region. A treatment control system controls the magnets and/or coils to guide the particle beam according to a treatment plan for the target volume of the patient.

The present disclosure relates to a particle therapy apparatus for irradiating a target with a charged particle beam. In one implementation, the apparatus includes an isocentric gantry rotatable about an axis and configured to direct a particle beam towards an isocenter of gantry and according to a final beam direction, a magnetic resonance imaging system configured to generate a main magnetic field parallel to the final beam direction, and a passive magnetic shield surrounding the magnetic resonance imaging system, the passive magnetic shield and the magnetic resonance imaging system being synchronously rotatable with the gantry about the axis.

Apparatus and methods for controlling a radiotherapy electron beam. Exemplary embodiments provide for focusing the electron beam at different depths by altering parameters of a plurality of magnets. Exemplary embodiments can also provide for focusing the electron beam at different depths while maintaining the energy level of the electron beam at a consistent level.