Radiofrequency identification tags for preoperative tumor localization: proof of concept.

Objective: The objective of our study was to experimentally explore the potential for tumor localization using radiofrequency identification (RFID) tags and a newly developed handheld RFID detector.

Materials And Methods: A unique RFID detector that combines the use of multiple interchangeable detector probes with both audio and LCD display signals was invented, allowing precise localization and identification of RFID tags. Accurate localization and identification were validated using this handheld RFID detector (TagFinder) and RFID tags of 2-mm diameter and 8- or 12-mm lengths.