Our work titled “Feasibility Study of UTE-Image-based SAR Estimation Without B1 mapping at 3T,” conducted at ICube in Strasbourg in collaboration with IADI in Nancy, received third prize for best abstract from the MR Safety Study Group at ISMRM 2026 in Cape Town. The ISMRM (International Society for Magnetic Resonance in Medicine) is the largest international conference dedicated to MRI and its medical, scientific, and technological applications.
This work was led by Zhongzheng He, a postdoctoral researcher at ICube, with Guillaume Paillart, Julien Lamy, Freddy Odille, and Paulo Loureiro de Sousa as co-authors. The study focuses on estimating the Specific Absorption Rate (SAR), which corresponds to the radiofrequency energy absorbed by tissues during an MRI scan—a key factor for patient safety, as heating caused by radiofrequency waves must be controlled.
The originality of this work lies in proposing a rapid, image-based method for personalized estimation of local SAR, using a single UTE acquisition without additional B1 mapping. By leveraging the natural contrast of the MRI image and anatomical segmentation, the estimation of local SAR—specific to each subject—takes only about five minutes. Preliminary results, both in simulation and in vivo, demonstrate strong potential for facilitating this assessment in a clinical setting.
HAL link : https://hal.science/hal-05493766
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