#$%^&*AU2016204106A120170202.pdf#####ABSTRACT A location pad includes multiple field-generators and a frame. The field-generators are configured to generate respective magnetic fields in a region-ofinterest of a patient body, for measuring a position of a medical instrument in the region-of-interest. The frame is configured to fix the multiple field-generators at respective positions surrounding the region-of-interest. The frame is open on at least one side of the region-ofinterest.1/3 -4- C:1 00 00 m - --------------------C'4 CN cq CF) v --------- --LLto 00 CX)i 00 C14 ro -dm Q0 (D Flo C14