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Abstract #4385

Correcting K-Trajectory by using Multiple Function Models of Gradient Waveform for Ultrashort TE(UTE)

Masahiro Takizawa1, Hikaru Hanada1, Kuniharu Oka1, Tetsuhiko Takahashi1

1MRI System Division, Hitachi Medical Corporation, Kashiwa, Chiba, Japan

The UTE sequence, based on radial sampling, acquires echo signal from central to outer parts of k-space. For this kind of sequence, K-trajectory error caused by gradient system response becomes a major problem. For clinical use of UTE it is important to be able to change imaging conditions and parameters for a general oblique imaging plane without causing K-trajectory errors. Even if there are errors on the gradient output, the K-trajectory can be estimated by calculating the error strictly. In this study, the multiple function models are used for correcting the total error of the gradient system response.