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Abstract #2412

An Automatic Real-Time Feedback Calibration of RF Phase Cycling by Off-Resonance Weighted Imaging Sequence

Yu-Wei Tang1, Teng-Yi Huang2, Ming-Long Wu3, Cheng-Wen Ko4

1Electrical Engineering , National Taiwan University of Science and Technology, Taipei, Taiwan; 2Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; 3Computer Science and Information Engineering, National Cheng Kung University, Tainan, Taiwan; 4Computer Science and Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan

The adjustment of system frequency or RF phase-cycling has demonstrated able to avoid dark-band artifact of bSSFP imaging. The optimal frequency can be detected by a sweep scan of bSSFP imaging. In this study, we proposed a new sequence named off-resonance weighted imaging (OWI) for accomplishing the frequency calibration. For higher accuracy and efficiency, an automatic real-time feedback optimization system was introduced. According to the results, the automatic real-time feedback system shows able to calibrate frequency accurately and rapidly. It is potential to serve as a pre-scan for bSSFP imaging or blood oxygenation sensitive SSFP (BOSS) fMRI.

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Keywords

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