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Beam angle optimization for external beam radiotherapy using slices

A radiotherapy, beam angle technology, used in radiotherapy, X-ray/γ-ray/particle radiation therapy, therapy, etc.

Active Publication Date: 2022-08-09
VARIAN MEDICAL SYST INT AG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Given the variability in patient anatomy and clinical goals, such a regimen may be suboptimal
In addition, radiation therapy treatment may involve multiple tumors or lesions that may be of very different volumes

Method used

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  • Beam angle optimization for external beam radiotherapy using slices
  • Beam angle optimization for external beam radiotherapy using slices
  • Beam angle optimization for external beam radiotherapy using slices

Examples

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Embodiment Construction

[0034] The present disclosure relates generally to treatment plans for radiation therapy using external beam radiation treatment systems, and more particularly to optimizing trajectories and field geometries in radiation treatment plans. The beam eye view (BEV) region and the BEV region connectivity manifold can be determined by evaluating the dose response for each region of interest for each vertex in the delivery coordinate space (DCS). The information contained in the BEV region and the BEV region connectivity manifold can be used to generate optimized trajectories or optimized field geometries in radiation treatment plans.

[0035] I. Processing System

[0036] figure 1 and figure 2 Radiation treatment systems of the type that can be used in conjunction with the present invention are depicted. refer to figure 1 , showing a perspective view of a radiation processing system, in this case a linear accelerator. Typically, such systems are capable of generating beams of ...

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Abstract

A beam angle optimization method for intensity modulated radiation therapy (IMRT) processing involves determining a beam eye view (BEV) area by evaluating the dose response of each region of interest for each vertex in the delivery coordinate space (DCS) and the BEV region connectivity manifold. The information contained in the BEV region and the BEV region connectivity manifold is used to guide the optimizer to find the optimal field geometry in the IMRT process. To improve the visibility of underexposed voxels of the planned target volume (PTV), post-processing steps can be performed to enlarge certain BEV regions that were considered for exposure during processing trajectory optimization.

Description

Background technique [0001] Significant progress has been made in reverse treatment planning for external beam radiation therapy using treatments such as IMRT and VMAT. As program quality requirements and clinic patient throughput requirements increase, the role of automation and a higher degree of individualization of processing plans becomes increasingly important. Selection of treatment fields, such as VMAT trajectories or IMRT fields, may be required prior to inverse optimization of MLC leaf sequences and dose rates in the radiation treatment plan. Handle selection of geometry (e.g. isocenter point(s), start and stop gantry angle, and collimator angle(s) for VMAT arcs, or gantry angle, bed angle, collimator angle for IMRT fields angle and jaw position) can be determined by the clinical protocol for a given treatment site. Given the variability in patient anatomy and clinical goals, such a regimen may be suboptimal. Furthermore, radiation therapy treatment may involve mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61N5/10
CPCA61N5/1031A61N5/1036A61N5/1047A61N5/103
Inventor C·B·洛克S·奥尔里拉K·K·布什
Owner VARIAN MEDICAL SYST INT AG
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