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Related Concept Videos

Ultrasonography01:17

Ultrasonography

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Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
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Related Experiment Video

Updated: Apr 1, 2026

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy
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[Ultrasound motion tracking for radiation therapy].

J Jenne1,2, J Schwaab3

  • 1Fraunhofer-Institut für Bildgestützte Medizin MEVIS, Universitätsallee 29, 28359, Bremen, Deutschland. juergen.jenne@mevis.fraunhofer.de.

Der Radiologe
|October 7, 2015
PubMed
Summary

Ultrasound motion tracking shows promise for improving radiotherapy accuracy by compensating for tumor movement during treatment. While technically feasible, its clinical adoption for lung and abdominal cancers requires further development.

Keywords:
Diagnostic ultrasoundImage guided radiotherapyImprovement potentialMotionTarget structure

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Area of Science:

  • Medical Physics
  • Radiotherapy Technology
  • Diagnostic Imaging

Background:

  • Accurate radiotherapy requires precise tumor localization (1-2 mm).
  • Respiration and peristalsis cause significant tumor motion in lung and abdominal cancers.
  • This motion can compromise radiation dose delivery accuracy.

Purpose of the Study:

  • To evaluate ultrasound motion tracking as a method for intrafractional motion detection and compensation in radiotherapy.
  • To assess the potential of ultrasound technology for real-time tumor tracking during radiation delivery.

Main Methods:

  • Utilizing ultrasound's high soft tissue contrast and real-time capabilities for motion detection.
  • Employing diverse algorithms for automatic motion tracking from 2D and 3D ultrasound images.
  • Investigating ultrasound as a non-ionizing, cost-effective imaging modality.

Main Results:

  • Ultrasound motion tracking offers real-time target coordinate determination.
  • Technical prerequisites for clinical implementation are largely met.
  • Challenges remain in defining sonographic windows and transducer positioning.

Conclusions:

  • Ultrasound motion tracking is a promising technology for enhancing radiotherapy precision.
  • Further research is needed to overcome current technical and clinical implementation challenges.
  • The field anticipates exciting progress in ultrasound-guided radiotherapy.