A robust B1+ mapping technique in the presence of metallic hardware is still unavailable. Our proposed B1+ quantification technique relies on turbo-spin echo or SEMAC acquisitions to decrease metal-related susceptibility artifacts while resolving B1+ values from signal variations at various sets of excitation and refocusing flip angles. Apriori knowledge of signal evolution is obtained by simulating the Bloch equations at each B1+ value. Phantom validation showed promising results, particularly at areas close to the metal surface, which are invisible with other mapping techniques.
This abstract and the presentation materials are available to members only; a login is required.