High-energy electron line multi-degree-of-freedom intensity modulated radiotherapy system based on longitudinal magnetic confinement
A technology of high-energy electrons and intensity-modulated radiotherapy, which is applied in radiotherapy, X-ray/γ-ray/particle irradiation therapy, treatment, etc. It can solve the problem of tumor underdose, high risk of collision, and slow down gradient of dose drop in the penumbra area of the field of view. and other issues to achieve the effect of reducing side scatter and improving therapeutic efficacy
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Embodiment 1
[0061] In order to simultaneously realize the radiotherapy electron beam restraint in the air and in the patient's body, and at the same time reduce the influence of the fringe magnetic field on the radiotherapy machine head as much as possible, the invention designs a three-stage split open-hole coil magnet, based on figure 2 The "soil"-shaped structure shown in a completes the coupling between the three-stage split hole coil magnet and the radiotherapy machine. The second-level coil group 32 and the third-level coil group 33 of the three-level split coil are mainly designed with a strong forward current, and a uniform longitudinal magnetic field is generated in the central area between the two to realize electronic restraint in the patient's body. The longitudinal fringe magnetic field between 32 and the first stage coil group 31 realizes electron wire confinement in air. The first stage coil group 31 surrounds the area where the radiotherapy machine head 20 is located, and...
Embodiment 2
[0063] According to the present invention, based on longitudinal magnetic confinement high-energy electron beam intensity-modulated radiotherapy equipment ( figure 2 ) established electronic wire multi-degree-of-freedom integrated optimization process such as image 3 shown. According to the characteristics of electronic beam dosimetry based on longitudinal magnetic confinement, the design experience of medical physicists with different degrees of freedom in the traditional radiotherapy plan design is extracted and quantified, and the sequential optimization strategy based on physicists’ experience feature extraction is adopted to gradually introduce different degrees of freedom ( gantry angle→collimator angle→electron energy and beam intensity), to realize the optimization scheme of multi-degree-of-freedom integrated optimization of electron wire based on longitudinal magnetic confinement.
[0064] The method of this embodiment comprises the following three steps:
[0065]...
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