The common misunderstanding
Many users focus on achieving a single “perfect measurement.”
But in practice, repeatability is far more important.
Real-world observation
- One measurement may look perfect.
- The next scan may drift due to slight environmental changes or probe inconsistencies.
A system that gives slightly imperfect but repeatable results is more trustworthy than one producing perfect but inconsistent numbers.
Engineer tip
When possible, use multi-point artifacts: ball bars or ball plates. In industrial CT, a ruby plate for CT system ensures that repeated scans maintain volumetric stability, helping highlight real errors rather than random noise.
Final thought
Prioritize repeatability over isolated accuracy numbers. This is the difference between usable results and misleading reports.