Sector magnet energy selection optimization and proton medical power spectrum regulation and control device and method

Abstract

The invention discloses a sector magnet energy selection optimization and proton medical power spectrum regulation and control device and method. The device comprises a laser, a target, a first focusing magnet, a sector magnet, a porous matched blocking piece, and a second focusing magnet. The device employs the porous matched blocking piece, and the porous matched blocking piece is a curved surface, wherein the curved surface is parallel to y axis, and the projection of the curved surface in the xz plane is coincided with a curve formed by the image points of proton beams with different energy in the xz plane; The device carries out the selection of the proton beams when the proton beams with different energy are focused at a minimum position, and the proton beams with the same energy and different divergent angles at the image point are converged to a very small size on the x axis, so the proton beams can be selected precisely. The device controls the transmission rate, improves the proton energy spatial resolution capability of the sector magnet, and can meet the requirements of dosage distribution of tumor treatment.

Description

technical field [0001] The invention relates to a laser accelerator tumor treatment technology, in particular to a fan-shaped magnet energy selection optimization and proton medical energy spectrum control device and a control method thereof. Background technique [0002] According to the statistics of the World Health Organization, about 10 million patients die of cancer every year in the world, and it is estimated that the number will reach 24 million in 20 years. Photon radiotherapy such as traditional X-rays has serious side effects. The dose deposition of protons and heavy ions in the human body does not release a large amount of energy immediately after entering the human body due to the presence of Bragg peaks, but only releases most of its energy at the position where the ions stop, thereby killing deep tumors and affecting superficial normal tissues. Damage is minimized. As of 2015, there have been more than 154,000 cases of proton and heavy ion tumor treatment wo...

AI Technical Summary

Problems solved by technology

[0006] The slit in the prior art is along the X direction, and the shutter switch is used to control whether the protons at a specific X coordinate can pass through. Setting the slit at the Z coordinate of 0 and selecting protons with different energies will result in proton beams with most energies The size of the cluster is large, and the protons that can dissipate large adjacent energies on the X-axis cannot be completely separated, so the energy selection is not ideal and the energy resolution is low.

Images