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Werner Heisenberg considered the limits of how accurately one can measure properties of an electron or other microscopic particles. He determined that there is a fundamental limit to how accurately one can measure both a particle’s position and its momentum simultaneously. The more accurate the measurement of the momentum of a particle is known, the less accurate the position at that time is known and vice versa. This is what is now called the Heisenberg uncertainty principle. He...
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An experiment often consists of more than a single step. In this case, measurements at each step give rise to uncertainty. Because the measurements occur in successive steps, the uncertainty in one step necessarily contributes to that in the subsequent step. As we perform statistical analysis on these types of experiments, we must learn to account for the propagation of uncertainty from one step to the next. The propagation of uncertainty depends on the type of arithmetic operation performed on...
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In analytical chemistry, we often perform repetitive measurements to detect and minimize inaccuracies caused by both determinate and indeterminate errors. Despite the cares we take, the presence of random errors means that repeated measurements almost never have exactly the same magnitude. The collective difference between these measurements - observed values - and the estimated or expected value is called uncertainty. Uncertainty is conventionally written after the estimated or expected value.
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Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies
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Uncertainty quantification analysis and optimization for proton therapy beam lines.

V Rizzoglio1, A Adelmann2, A Gerbershagen1

  • 1Paul Scherrer Institut, 5232 Villigen, Switzerland; CERN, 1211 Geneva, Switzerland.

Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)
|May 31, 2020
PubMed
Summary
This summary is machine-generated.

Uncertainty Quantification (UQ) methods are used to identify errors in proton therapy beamlines, improving dose accuracy for cancer treatment. This research demonstrates UQ

Keywords:
Beam dynamicsBeam line optimizationProton therapyUncertainty quantification

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Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Accelerator Physics

Background:

  • Proton therapy is a crucial treatment for deep-seated tumors, demanding high precision.
  • Accurate dose delivery in proton therapy requires quantifying uncertainties in various treatment aspects.
  • Uncertainty Quantification (UQ) is emerging as a key method for verifying treatment plan robustness.

Purpose of the Study:

  • To apply UQ for identifying errors in cyclotron-based proton therapy transport lines.
  • To analyze the impact of these errors on therapeutic beam properties.
  • To showcase UQ's potential in optimizing complex beam optics for proton therapy.

Main Methods:

  • Application of Uncertainty Quantification (UQ) techniques.
  • Analysis of errors in cyclotron-based proton therapy transport lines.
  • Utilizing sensitivity analysis and surrogate models for optimization.

Main Results:

  • First application of UQ to pinpoint typical errors in proton therapy transport lines.
  • Demonstrated impact of identified errors on therapeutic beam characteristics.
  • Showcased UQ's effectiveness in optimizing high-dimensional beam optics problems.

Conclusions:

  • UQ is a valuable tool for identifying and mitigating errors in proton therapy systems.
  • UQ enhances the accuracy and robustness of proton therapy treatment planning.
  • UQ facilitates the optimization of complex accelerator designs, like superconducting gantries.