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.