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Abstract #3806

METHOD for CENTER FREQUENCY CALIBRATION USING STIR ON/OFF SPECTRA

Andrew J Wheaton1
1Canon Medical Research USA, Mayfield Heights, OH, United States

Synopsis

Keywords: System Imperfections, System Imperfections: Measurement & Correction, frequency calibration

Motivation: To propose a robust method for center frequency (F0) calibration.

Goal(s): To improve image quality across a wide range of clinical conditions by improving the accuracy and robustness of center frequency calibration.

Approach: A model-based peak fitting approach is applied to spectra acquired with STIR fat suppression on and off. The model kernels are tuned individually for STIR on/off data. By jointly solving F0 in both STIR on/off data the F0 calibration is robust even in the presence of strong fat signal (e.g. breast).

Results: The proposed method was successful in 100% of test cases (51/51) across a range of human anatomies.

Impact: Accurate and consistent center frequency calibration is critical for reliable image quality. The proposed method is robust to a wide range of clinical conditions and anatomies, including tissues with high off-resonance (e.g. cervical spine) or high fat content (e.g. breast).

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Keywords