  The high cost and low image quality traditionally associated with proton
computed tomography (pCT) have prevented it from seeing significant use in
clinical settings. A cheap, compact, high-density scintillating glass detector
capable of being attached to existing proton therapy gantries may help address
these concerns. The design of the detector allows for use in conjunction with
single-proton counting reconstruction algorithms, as well as beam-based
algorithms that do not resolve individual protons within an accelerator bunch.
This study presents quantitative reconstructed images of proton stopping power
from Monte Carlo generated pCT scans using the radiation transport code MCNP6,
demonstrating the feasibility of proton imaging using this detector design.
Relative error and contrast have been examined and compared for images
reconstructed using two reconstruction algorithms: a standard filtered
backprojection algorithm to act as a benchmark, and a variant of a pCT
algorithm which utilizes the concept of distance-driven binning.
