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SU-E-J-148: Fabrication of an Anatomically Realistic Dynamic Respiratory Phantom
M Wagar1, E Mannarino1, S Friesen1
1Brigham and Women's Hospital, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA.
Medical Physics
|May 19, 2017
Summary
A novel, anatomically correct respiratory phantom was developed for precise dose measurements in moving thoracic structures. This realistic phantom enhances in vivo measurement simulations for improved radiation therapy planning.
Area of Science:
- Medical Physics
- Radiotherapy
- Phantom Development
Background:
- Accurate dose measurement in thoracic structures is crucial for effective radiotherapy.
- Simulating realistic respiratory motion in phantoms is challenging but essential for in vivo accuracy.
Purpose of the Study:
- To design an anatomically correct respiratory phantom for precise dose measurements.
- To enable realistic simulation of in vivo measurements within moving thoracic structures.
Main Methods:
- Modified an Alderson Phantom by removing proprietary components.
- Segmented CT images to create foam rubber lung structures.
- Integrated a custom diaphragm chamber driven by an air compressor.
Main Results:
- Developed a phantom with lung material density comparable to human lungs (-800 HU).
- Achieved realistic respiratory motion simulation.
- Phantom accommodates various dosimeters and adaptable for diverse tumor/structure configurations.
Conclusions:
- The created versatile humanoid phantom facilitates experiments on thoracic organ dose.
- Enables investigation of different planning techniques under varying respiratory conditions.
- Provides a more anatomically correct experimental setup for radiotherapy research.
