Qiong Zhang1, Yong Xiao Zhang2, and Yulong Liu3
1DL, Siemens, Shenzhen, China, 2MR Collaborations, Siemens Healthcare Ltd., Shenzhen, China, 3Beijing Institute of Technology, BeiJing, China
1DL, Siemens, Shenzhen, China, 2MR Collaborations, Siemens Healthcare Ltd., Shenzhen, China, 3Beijing Institute of Technology, BeiJing, China
In this work, we provided a component-projection algorithm for Pilot Tone (PT) signal anti-jamming. The interference of a PT signal induced by the MR measurement can be effectively mitigated by discarding the interference principle component.
Fig3. Phantom experiment result: 4-channel PT signals (a hypothetical breath signal was generated) were seriously distorted by phantom scanning. The output PT signal processed by the component projection algorithm is at the bottom of the figure; a multi-slice HASTE protocol was used to generate interferences.
Fig2. (1) Data acquired before scanning are used for algorithm preparation (only one channel signal is displayed). The interference signal is assumed to keep the principle component direction, the algorithm calculated with (1-a) is effective for suppressing the following interferences (1,b,c or d); (2) is the flow chart of the component-projection algorithm, which is conducted in real-time.The interference were effectively suppressed by discarding the principle component of its Eigen Space.