Systems, methods, and devices for real-time treatment verification using electronic portal imaging device

An electronic portal image and image technology, applied in X-ray/γ-ray/particle irradiation therapy, radiotherapy, radiation detection device, etc., can solve problems such as patient damage, system error, and inability to consider changes

Inactive Publication Date: 2015-08-12
VARIAN MEDICAL SYSTEMS +1
View PDF10 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Recently, despite pre-treatment validation, errors in the delivery of radiation therapy have resulted in injury to patients, some with fatal consequences
In particular, because this verification

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Systems, methods, and devices for real-time treatment verification using electronic portal imaging device
  • Systems, methods, and devices for real-time treatment verification using electronic portal imaging device
  • Systems, methods, and devices for real-time treatment verification using electronic portal imaging device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] An electronic portal imaging device (EPID) can be used to verify proper treatment of a patient by measuring radiation (eg, output images) passing through the patient and thus incident on the EPID. A cine stream of output image frames acquired during patient treatment may be processed and used to verify in real-time or near real-time (eg, less than 1 second) that the dose delivered was not harmful to the patient. As used herein, a cine stream means the continuous stream of image frames acquired by the EPID during the continuous acquisition mode of operation.

[0024] For example, EPID can run at a specific frame rate (such as, but not limited to, 15 frames per second), which rate is a configurable setting to optimize imaging capabilities subject to EPID or other hardware limitations, among other things. Image frames acquired during a predetermined period for dose checking may be combined (eg, by summing) to form a single output image, which may represent the dose arrivin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A radiation dose received by a patient 110 from a radiation therapy system 100 can be verified by acquiring a cine stream of image frames from an electronic portal imaging device (EPID) 108 that is arranged to detect radiation exiting the patient during irradiation. The cine stream of EPID image frames can be processed in real-time to form exit images providing dose measurements at the EPID (e.g., absolute dose as dose-to-water values), which can be representative of the characteristics of the radiation received by the patient. Compliance with predetermined characteristics for the field can be determined during treatment by periodically comparing the dose measurements with the predetermined characteristics, which can include a predicted total dose in the field after full treatment and/or a complete irradiation area outline (CIAO). The system operator can be alerted or the irradiation automatically stopped when non-compliance is detected.

Description

technical field [0001] The present disclosure relates generally to the delivery of radiation to a patient, and more particularly to systems, methods, and apparatus for real-time dose verification of radiation therapy treatments using electronic portal imaging devices (EPIDs). Background technique [0002] Dynamic radiation therapy techniques, such as Intensity Modulated Radiation Therapy (IMRT) and Volume Modulated Arc Therapy (VMAT), are typically used with radiation therapy systems such as linear accelerators (linacs) equipped with multi-leaf collimators (MLC) to treat pathological anatomy by delivering specified doses of radiation (X-rays, gamma rays, electrons, protons, and / or ions) to the pathological anatomy while minimizing radiation exposure to surrounding tissues and critical anatomical structures (Tumors, lesions, vascular malformations, nervous disorders, etc.). The use of MLCs allows radiotherapists to treat patients from multiple angles while varying the shape ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): A61B6/00
CPCA61N5/1071A61B6/5205A61N2005/1054A61B6/52A61N5/1045A61B6/486A61N5/1048A61B6/42A61N5/1067A61N5/1031A61B6/4258A61N5/1047A61N5/1075
Inventor C·巴尔特斯T·霍尔姆斯
Owner VARIAN MEDICAL SYSTEMS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap