Why Measure for EEG Electrode Placement?
Measure Faster. Measure Accurately. Improve Patient Care.
Accurate EEG interpretation begins with accurate electrode placement.
The International 10-20 System was developed to provide a standardized, reproducible method for locating EEG electrodes. When measurements are not performed, electrode locations become estimates, introducing variability that can affect reproducibility, trending, localization, and confidence in interpretation.
The ez1020™ system simplifies the measurement process by helping technologists establish accurate, repeatable electrode locations quickly and consistently—without performing any mathematical calculations.
A Clean EEG Isn't Necessarily an Accurate EEG
A recording may appear technically acceptable while electrode locations remain inaccurate.
According to ACNS guidelines, studies that are not physically measured should be documented as estimated electrode placement. In practice, however, many EEG recordings are performed using estimation alone, and the interpreting physician may have no indication that measurements were not performed.
Even small placement variations can alter spatial relationships between electrodes and affect the reproducibility of EEG recordings over time.
Accurate electrode placement is not simply a compliance issue—it is a quality issue. The physician assumes the electrodes are located where the recording indicates they are.
The issue isn’t just compliance. It’s the integrity of the data guiding clinical decisions.
This is why we measure.
How the ez1020™ System Simplifies Measurement
The ez1020™ system uses two simple techniques to create a consistent geometric framework for electrode placement:
Technique 1: Finding Center Between Two Points
Quickly identify the center between two points without performing mathematical calculations, reducing complexity while supporting accurate and reproducible electrode placement.
Technique 2: Marking Points in a Sequence
Establish subsequent electrode locations using a simple, repeatable process that supports symmetry and consistency.
Together, these techniques simplify International 10-20 System measurements and help reduce variability between technologists.
Watch the Complete Demonstrations
Why Labs Are Standardizing Their Measurement Process
- Supports accurate, reproducible electrode placement
- Reduces variability between technologists
- Improves consistency between studies
- Supports adherence to ACNS guideline recommendations
- Strengthens confidence in EEG interpretation
- Helps establish a standardized approach to electrode placement and documentation
- Supports high-quality patient care through improved recording consistency
Electrode placement is the foundation of every EEG recording. When electrode locations are standardized and reproducible, clinicians can have greater confidence that changes observed in the EEG reflect the patient—not differences in electrode placement.