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Abstract #4617

Frequency Adjustments in TIDE BSSFP Imaging to Compensate for Banding Artifacts Caused by Dental Braces

Yin-Cheng Kris Huang1, Chun-Jung Juan2, Te-Son Kuo1

1Department of Electrical Engineering, National Taiwan University, Taipei City, Taiwan; 2Department of Radiology, Tri-Service General Hospital, Taipei City, Taiwan

Metallic implants caused image artifacts like in-plane distortion and T2*-related signal loss. As discovered in our preliminary studies that when dental braces were present, there were banding artifacts in the resulted TIDE bSSFP images, while the in-plane distortion was much less severe than the TSE images. The signal loss is likely due to the inherent off-resonance suppression mechanism for the findings of continuous phase drifts rather than random phases. Therefore, we applied system frequency adjustment to validate this hypothesis, and also used post-processing methods to combine the images acquired at various system frequencies, in hope to obtain an artifact-minimized image.