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Abstract #4870

Improvement of radiofrequency lesion visualization using 3D T1-weighted compressed sensing imaging

Pierre Bour1,2,3,4, Valéry Ozenne1,2,3, Marylène Delcey 1,2,3,5, Takeshi Kitamura1,2,3,6, David Gonthier1,2,3, Michaela Schmidt7, Christoph Forman7, Wadie Ben Hassen5, Hubert Cochet 1,2,3,6, Pierre Jais1,2,3,6, and Bruno Quesson 1,2,3

1IHU-LIRYC, PESSAC, France, 2Univ. Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, Bordeaux, France, 3INSERM U1045, Bordeaux, France, 4Image Guided Therapy, Pessac, France, 5Siemens Healthcare, Saint-Denis, France, 6Bordeaux University Hospital (CHU), Bordeaux, France, 7Siemens Healthcare, Erlangen, Germany

Visualization of acute radiofrequency lesions in the heart is a key point to assess the endpoint of catheter-based anti-arrhythmic therapy. Albeit 3D navigated T1-weighted sequences have proven there reliability to delineate lesion cores and edema, these sequences remain too lengthy/insufficiently spatially resolved to be used clinically. In this study we investigated the benefit of combining 3D T1-weighted acquisition with compressed sensing acceleration to reduce acquisition duration while maintaining sufficient spatial resolution to visualize the core of the lesion and surrounding edema. Methods are evaluated with/without gadolinium injection with different inversion times in vivo in the heart of swine.

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