This final project presents a quality assurance dashboard for a proton therapy center, displaying the status of multiple beam parameters across three large donut charts. Each ring segment represents a specific measurement spot or energy level, with parameter names labeled along curved paths. The visualization is built with React and D3 v6, using `d3.pie` and `d3.arc` to generate the SVG donut segments, while custom path generators position the labels. Data is loaded from a CSV file containing spot-by-spot measurement values, rendered as green arcs.