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Abstract #2567

A Motion Tracking Method Applying Spread Spectrum Communication to Tagging MRI

Yoshiaki Komori1, Akira Amano2, Keiko Maehara1, Jin Li1, Narazaki Michiko1, Matsuda Tetsuya1

1Department of Systems Science, Graduate School of Informatics, Kyoto University, Kyoto, Japan; 2Department of Bioinformatics, College of Life Science, Ritsumeikan University, Kusatsu, Japan

We propose a new motion tracking method that encodes the position information of phantoms on a pixel-by-pixel basis by using tag patterns as digital codes. The experiments were conducted using stationary and moving phantoms. A segmented fast low angle shot cine sequence with SPAMM preparation pulses was used to encode the position information as 7-bit code words. This spread code was used to decode the position information. A spread spectrum communication technique was introduced into tagging MR images by regarding the tag patterns as digital codes. The position information of a moving phantom was successfully detected on a pixel-by-pixel basis.