Method and device for fast raster beam scanning in intensity-modulated ion beam therapy

A raster scanning, fast scanning technology, used in X-ray/γ-ray/particle irradiation therapy, radiation therapy, treatment, etc., can solve problems such as increasing the overall treatment time

Inactive Publication Date: 2017-04-26
PHENIX MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both methods increase the overall disposal time

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  • Method and device for fast raster beam scanning in intensity-modulated ion beam therapy
  • Method and device for fast raster beam scanning in intensity-modulated ion beam therapy
  • Method and device for fast raster beam scanning in intensity-modulated ion beam therapy

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Embodiment Construction

[0038] Embodiments of the present invention are directed to providing a cost-effective alternative to spot beam scanning that can deliver intensity-modulated ion beam therapy via rapid, modest dose repainting, and substantially alleviates the problems associated with organ motion and beam Misalignment related to the problem described above. Embodiments of the invention also facilitate a method of ion beam therapy that relaxes some of the requirements for monitoring dosimetry implied by concerns related to scanning accuracy and spot-to-spot dose variation.

[0039] figure 1 A schematic layout of a conventional fixed-energy, fixed-intensity passive scattering system 10 for ion beam therapeutic delivery to a target volume or tumor 13 is shown, using a patient-specific aperture 11 and compensator 12 to 15 and a wide beam 14 generated by a range modulator 16 to form the desired radiation field. For comparison, figure 2 Shown is a system 20 for delivery of variable energy, inten...

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Abstract

A method and device are designed to deliver intensity-modulated ion beam therapy radiation doses closely conforming to tumors of arbitrary shape, via a series of two-dimensional (2-D) continuous raster scans of a pencil beam, wherein each scan takes no more than about 100 milliseconds to complete. The device includes a fast scanning nozzle for the exit of an ion beam delivery gantry. The fast scanning nozzle has a fast combined-function X-Y steering magnet, and is coupled to a rastering control system capable of adjusting the length of each scan line, continuously varying the beam intensity along each scan line, and executing multiple rescans of a tumor depth layer within a single patient breathing cycle. An in-beam absolute dose and dose profile monitoring system is capable of millimeter-scale position resolution and millisecond-scale feedback to the control system to ensure the safety and efficacy of the treatment implementation.

Description

technical field [0001] The present invention generally relates to methods and systems for radiation therapy treatment. More specifically, the present invention relates to particle beam delivery for ion beam therapy based on scanning of intense accelerator beams of small cross-sectional area (so-called "pencil" beams) and adjustable energy and intensity to conformally irradiate Target the full volume of a tumor of any shape while delivering a minimal dose to surrounding healthy tissue. Background technique [0002] Proton or heavier ion beam therapy can significantly improve dose localization compared to standard X-ray therapy by increasing the dose delivered to the target volume while minimizing the dose delivered to surrounding tissues. These improvements are based on the limited penetration range of the therapeutic ion beam in the target material. Furthermore, the energy deposition to the target material increases as the ion beam decelerates and reaches a sharp maximum n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10A61B18/00
CPCA61N5/1043A61N5/1044A61N5/1068A61N5/1071A61N2005/1087
Inventor J·M·卡梅伦V·安费罗夫S·韦格多尔
Owner PHENIX MEDICAL
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