Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Videos

A modified synchronous shielding technique in rotation therapy.

¹Department of Medical Physics and Biomedical Engineering, Plymouth General Hospital, Freedom Fields.

The British Journal of Radiology

|June 1, 1990

Summary

This summary is machine-generated.

Synchronous shielding in rotation radiotherapy uses moving absorbers to shape radiation beams, but can cause dose variations. Wedge filters attached to absorbers can improve dose uniformity in rotation radiotherapy treatments.

Related Experiment Videos

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

A pragmatic approach to dosimetric audit in radiotherapy.

The British journal of radiology·2002

Same author

The use of an optical outlining system for weekly on-set verification of patients with carcinoma of the breast.

Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology·1998

Same author

Prediction of rebleeding from peptic ulcer experience with an endoscopic Doppler device.

Gut·1986

Same author

'Paris' technique implant dosimetry tables for 0.3 and 0.6 mm diameter 192Ir wire.

The British journal of radiology·1985

Same author

Matching of adjacent radiation beams for isocentric qadiotherapy.

The British journal of radiology·1984

Same author

Dosimetry tables for standard iridium-192 wire planar implants.

The British journal of radiology·1984

Area of Science:

Medical Physics
Radiation Oncology

Background:

Synchronous shielding is a technique used in rotation radiotherapy to shape radiation beam profiles.
This method aims to protect nearby radiosensitive structures by modifying the beam's cross-section during treatment.
However, it often leads to significant dose variations within the target treatment volume.

Purpose of the Study:

To investigate methods for reducing dose variations in synchronous shielding during rotation radiotherapy.
To assess the efficacy of using wedge-shaped filters to modify the beam's dose rate profile.
To develop and evaluate a prototype device for orientating absorbers and filters during rotation treatments.

Main Methods:

A prototype device was designed and constructed to orient absorbers and wedge filters.
The device was experimentally assessed using a 6 MV X-ray beam.
The impact of wedge filters on the dose rate profile and dose distribution was evaluated.

Main Results:

The study demonstrated that modifying the dose rate profile with wedge filters can reduce unacceptable dose variations.
Experimental assessment confirmed the feasibility of orientating absorbers and filters during rotation.
The prototype device showed potential for improving dose conformity in rotation radiotherapy.

Conclusions:

Wedge-shaped filters are effective in mitigating dose variations associated with synchronous shielding in rotation radiotherapy.
The developed mechanism provides a viable solution for precise orientation of shielding components.
This approach offers improved dose control for protecting organs at risk during complex radiotherapy treatments.