Guideline 8: Guidelines for Recording Clinical EEG on Digital Media

With digital systems becoming widely available and relatively inexpensive, it has become practical to record EEG onto magnetic or optical long-term storage media. Such recording has several advantages. It can help reduce the space problem of storing original paper records over many years. It also allows review of selected portions of an EEG record using montages, filters, vertical scaling (gain or sensitivity), and horizontal scaling (e.g., paper speed) selected after the original recording. Finally, digital recording allows the possibility of further digital processing after the fact. These recommendations describe only minimal technical standards for recording clinical EEG on digital media. Standardization of the structure and format of the data recorded, for free exchange of compatible recordings among EEG laboratories, is addressed separately by the American Clinical Neurophysiology Society (ACNS) document, "Standard Specification for Transferring Digital Neurophysiological Data Between Independent Computer Systems."