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Components of the RFID lung marking system. A, Delivery device that is used through a bronchoscope with a 2-mm working channel. B, Passive RFID tag with nitinol coil (13.56 MHz; 3.2 × 1.6 × 0.9 mm). C, Detection probe (diameter, 10 mm) with 30-mm communication range. D, Signal-processing unit.
