Dual Echo Tip Tracking with Orthogonal Dephaser Gradients
Bock M, Mller S, Semmler W
German Cancer Research Center
A projection technique for marker coil localization is proposed which utilizes two projections acquired in a double-echo technique. The two echoes differ in the preparation of the projection signal which is optimized to suppress background from lengthy cable structures in one direction. After Fourier transformation, a point-wise multiplication of the projection data is performed to enhance the localized marker coil signal. For optimal signal preparation a maximum signal-to-background-ratio of about 200 was achieved.