David O. Brunner,Christoph Barmet,Klaas P. Prussmann,Thomas Schmid
申请号：
US15577860
公开号：
US20180172784A1
申请日:
2016.05.30
申请国别(地区):
US
年份:
2018
代理人:
摘要：
The invention relates to a system and a method for tracking position and orientation of an object in a magnetic resonance (MR) apparatus. The system comprises a tracking device for electromagnetic measurements of position and orientation with a) a tracker structure (2) that is firmly attachable to the object (4) of which the position and orientation are to be measured； b) retransmitter means (6； 8a, 8b, 8c) firmly attached to said tracker structure, said retransmitter means having at least one retransmitter resonance frequency； and c) electrical circuitry means including: i) transmitter means (10) for transmitting an electromagnetic field with at least one of said retransmitter resonance frequencies； ii) receiver means (12； 14a,14b) for receiving an electromagnetic field retransmitted by said retransmitter means； said receiver means converting said electromagnetic field into a proportional voltage； and iii) calculating means for determining, from said proportional voltages obtained from said receiver means, a position and orientation of said retransmitter means, and concomitantly of said object. The tracking device can be used in an operating MR imaging or spectroscopy apparatus.
