Protoniradiografiassa

Protoniradiografiassa, also known as proton radiography or proton computed tomography (pCT), is an advanced imaging technique that uses a beam of protons to create cross-sectional images of an object. Unlike traditional X-ray radiography which relies on the attenuation of photons, proton radiography measures the energy loss and scattering of protons as they pass through matter. This difference in physical principle allows proton radiography to provide unique information not available with X-rays.

The primary advantage of proton radiography lies in its superior ability to distinguish between different tissue types, particularly those with similar electron densities. As protons interact with matter, they undergo both continuous energy loss (Bethe-Bloch formula) and scattering. The amount of energy loss is sensitive to the material's density and composition, while scattering is influenced by the atomic number of the material. By precisely measuring these interactions, proton radiography can generate images that offer enhanced contrast, especially for differentiating between soft tissues, bone, and even subtle density variations within tissues.

This technique has significant potential applications in medical imaging, particularly in radiation therapy planning and diagnostics. In radiation therapy, accurate visualization of tumor boundaries and surrounding healthy tissues is crucial for delivering precise radiation doses. Proton radiography's high contrast capabilities can aid in delineating these structures more effectively than X-rays, potentially leading to more targeted and less damaging treatments. While still an evolving technology, proton radiography holds promise for improving diagnostic accuracy and treatment efficacy in various medical fields.