Concentration Score

A percentage measuring how much of the total measured field intensity at the accessory surface lands in the therapeutic core (scan points where Gauss is at or above 35% of peak). It's calculated as the sum of Gauss values at those points divided by the total sum of all measured Gauss values within the coil boundary. This is a surface concentration metric. It measures lateral field distribution across the face of the accessory, not depth penetration. The threshold was 50% of peak before August 2026; it was lowered to 35% because 50% proved too strict a definition of a strong field, and scores published before that date are not directly comparable to scores published after it. Across the accessories Gauss Labs has measured at the current threshold, discs score between 74% and 98%, and loops and rings between 58% and 100%. The formula is geometry-independent, so the same calculation applies to all coil types. Compare scores within the same coil type for meaningful benchmarks.