A typical annual or monthly test only verifies your LINAC at a single point in time. If a critical beam symmetry or dose constancy parameter registers a deviation under the baseline margin today, it technically registers as a pass.
The 11-Month Blind Spot: If that parameter actively drifts past the tolerance ceiling just 30 days after your annual test, your team will continue treating patients using an out-of-tolerance machine for the next 11 months without ever realizing it.
Pocket QA monitors trend velocity on every mechanical and dosimetric axis. It continuously processes incoming measurements to predict exactly when a parameter will exit clinical tolerances, closing the dangerous blind spot between scheduled audits.