Publications by authors named "Ryan Fullarton"
Background: Motion of lung tumors during radiotherapy leads to decreased accuracy of the delivered dose distribution. This is especially true for proton radiotherapy due to the finite range of the proton beam. Methods for mitigating motion rely on knowing the position of the tumor during treatment.
View Article and Find Full Text PDFProton radiography is a promising development in proton therapy, and researchers are currently exploring optimal detector materials to construct proton radiography detector arrays. High-density glass scintillators may improve integrating-mode proton radiography detectors by increasing spatial resolution and decreasing detector thickness. We evaluated several new scintillators, activated with europium or terbium, with proton response measurements and Monte Carlo simulations, characterizing relative luminosity, ionization quenching, and proton radiograph spatial resolution.
View Article and Find Full Text PDFArticle Synopsis
- Integrated-mode proton radiography can effectively create water equivalent thickness (WET) maps, which are useful for managing patient motion and verifying treatment ranges in proton therapy.
- The study introduces a novel reconstruction method that utilizes 2D information from two lateral view cameras, significantly enhancing image quality compared to traditional methods that use a single camera.
- Experimental results show this new method achieves higher resolution and contrast in radiographs, leading to improved accuracy in WET measurements, which is crucial for optimizing clinical proton therapy applications.
Background: Particle imaging can increase precision in proton and ion therapy. Interactions with nuclei in the imaged object increase image noise and reduce image quality, especially for multinucleon ions that can fragment, such as helium.
Purpose: This work proposes a particle imaging filter, referred to as the Prior Filter, based on using prior information in the form of an estimated relative stopping power (RSP) map and the principles of electromagnetic interaction, to identify particles that have undergone nuclear interaction.