Abstract #2068

Respiratory motion-registered isotropic 3D whole-heart T2 mapping in patients with suspected inflammatory myocardial injury

Karolina Dorniak¹, Lorenzo Di Sopra², Agniezka Sabisz³, Anna Glinska³, Christopher W Roy², Kamil Gorczewski⁴, Davide Piccini^2,5, Jérôme Yerly^2,6, Jadwiga Fijałkowska³, Edyta Szurowska³, Matthias Stuber^2,6, and Ruud B van Heeswijk²

¹Department of Noninvasive Cardiac Diagnostics, Medical University of Gdansk, Gdansk, Poland, ²Radiology, Lausanne University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland, ³2nd Department of Radiology, Medical University of Gdansk, Gdansk, Poland, ⁴Siemens Healthineers, Erlangen, Germany, ⁵Advanced Clinical Imaging Technology, Siemens Healthcare AG, Lausanne, Switzerland, ⁶Center for Biomedical Imaging (CIBM), Lausanne, Switzerland

T₂ mapping can be used to effectively detect myocardial edema and inflammation. However, the focal nature of myocardial inflammation may render 2D approaches suboptimal and make whole-heart isotropic 3D mapping desirable. Unfortunately, at 1.5T, self-navigated 3D radial bSSFP results in too noisy images for adequate T₂ mapping. In this study, we therefore used a respiratory motion-resolved reconstruction together with image registration to improve the 3D T₂ mapping precision and accuracy at 1.5T in patients with inflammatory myocardial injury. The resulting myocardial T₂ values matched those of the routine 2D T₂ maps, with no discernible bias and slightly lower precision.

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