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Updated: May 21, 2026

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy

Published on: June 7, 2015

Motion compensation in radiotherapy.

Matthias Guckenberger¹, Anne Richter, Judit Boda-Heggemann

¹Department of Radiation Oncology, University Hospital Würzburg, Würzburg, Germany.

Critical Reviews in Biomedical Engineering

|June 15, 2012

Summary

This summary is machine-generated.

Image-guided radiotherapy (IGRT) reduces margins for static tumors. New strategies now compensate for breathing-induced motion in liver and lung targets during treatment delivery.

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Treatment of Liver Metastases Using an Internal Target Volume Method for Stereotactic Body Radiotherapy

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Published on: May 8, 2018

Area of Science:

Radiation Oncology
Medical Physics

Background:

Image-guided radiotherapy (IGRT) has significantly reduced safety margins by addressing positioning uncertainties.
Target motion during treatment delivery, particularly breathing-induced motion in lung and liver tumors, remains a challenge for photon and particle radiotherapy.

Purpose of the Study:

To review current and developing strategies for compensating organ motion during radiotherapy.
To highlight advancements in motion management for improving treatment accuracy.

Main Methods:

Overview of clinical strategies including optimized margins, breath-hold techniques, gated treatments, and tumor tracking.
Discussion of various surveillance methods for gating and tracking (e.g., fiducial markers, surface scanning, ultrasound).
Mention of tracked treatments involving linear accelerators with adaptive components.

Main Results:

Several motion compensation strategies are already in clinical use or under development.
Techniques like external markers, surface scanning, implanted markers, fluoroscopy, and ultrasound are employed for tracking.
Adaptive linear accelerator treatments are progressing towards clinical implementation.

Conclusions:

A variety of strategies exist to mitigate intrafractional target motion in radiotherapy.
Advanced motion compensation strategies are nearing clinical introduction.
These strategies aim to minimize margins for moving targets, similar to how IGRT did for static tumors.