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Updated: May 18, 2026
05:57
Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
Published on: April 1, 2020
Development and optimization of a beam shaper device for a mobile dedicated IOERT accelerator
Antonella Soriani1, Giuseppe Iaccarino, Giuseppe Felici
1Laboratory of Medical Physics and Expert Systems, National Cancer Institute Regina Elena, Rome, Italy. soriani@ifo.it
Medical Physics
|October 9, 2012
Summary
A novel beam shaper for intraoperative electron radiotherapy (IOERT) was developed. This device ensures dose homogeneity and conformal treatment, protecting organs at risk during mobile accelerator procedures.
Area of Science:
- Medical Physics
- Radiation Oncology
- Accelerator Technology
Background:
- Intraoperative electron radiotherapy (IOERT) requires precise beam shaping.
- Protecting organs at risk and conforming beams to target geometry are critical challenges.
Purpose of the Study:
- To design and construct a prototype beam shaper for mobile accelerators.
- To characterize the dosimetric properties of the beam shaper for IOERT.
Main Methods:
- Monte Carlo (MC) simulations using BEAMnrc/OMEGA and DOSXYZnrc codes.
- Experimental dosimetry with silicon diodes, ion chambers, and radiochromic films.
- Measurements in water and PMMA phantoms at various energies and field sizes.
Main Results:
- The prototype beam shaper creates square, rectangular, and squircle fields with adequate dose homogeneity.
- MC simulations showed excellent agreement (<2%) with experimental data.
- Beam shaper performance was evaluated across different energies, field sizes, and source-to-skin distances.
Conclusions:
- The beam shaper enables conformal treatment and protects organs at risk during IOERT.
- MC simulations are valuable for planning IOERT treatments and improving dose accuracy.
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