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Abstract #4818

Feasibility and Reproducibility of Ventilation and Perfusion Imaging at a 0.35 T MR-Linac in Healthy Volunteers and Lung Cancer Patients

Rabea Klaar1,2, Moritz Rabe3, Thomas Gaass1,2, Moritz J. Schneider1,2,4, Ilyes Benlala1,2,5, Stefanie Corradini3, Chukwuka Eze3, Claus Belka3,6, Guillaume Landry3, Christopher Kurz3, and Julien Dinkel1,2
1Department of Radiology, University Hospital, LMU Munich, Munich, Germany, 2Comprehensive Pneumology Center (CPC-M), Member of the German Center for Lung Research (DZL), Munich, Germany, 3Department of Radiation Oncology, University Hospital, LMU Munich, Munich, Germany, 4Antaros Medical AB, BioVenture Hub, Mölndal, Sweden, 5Univ. Bordeaux, INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, F-33000 Bordeaux, France, 6German Cancer Consortium (DKTK), Munich, Germany

Synopsis

Keywords: Lung, Cancer, Ventilation, PerfusionHybrid MR-imaging and linear accelerators for radiotherapy allow highly accurate treatment of lung cancer patients. The potential of Non-uniform Fourier Decomposition (NuFD), a non-contrast enhanced free-breathing technique that allows the assessment of lung ventilation and perfusion, was investigated in 10 healthy subjects and 2 lung cancer patients at a 0.35 T MR-Linac. Due to challenging ventilation quantification and reproducibility, two normalization strategies were proposed. Evaluation on repeated scans demonstrated clear improvement compared to uncorrected cases. First longitudinal ventilation assessment over treatment course shows promising results for the use of NuFD as treatment response monitoring tool in the clinical workflow.

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