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Abstract #1478

Automated Segmentation of Metastatic Lymph Nodes in FDG PET/MRI for Lymphoma Cancer Patients Using Multi-Scale Swin Transformers

Anum Masood1,2, Sølvi Knapstad2, Håkon Johansen3, Trine Husby3, Live Eikenes 1, Mattijs Elschot 1,3, and Pål Erik Goa2,3
1Department of Circulation and Medical Imaging, NTNU, Trondheim, Norway, 2Department of Physics, NTNU, Trondheim, Norway, 3Department of Radiology and Nuclear Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway

Synopsis

Keywords: Machine Learning/Artificial Intelligence, PET/MR, Automated Segmentation, Deep Learning, TransformersAutomated segmentation of tumors and designing a computer-assisted diagnosis system requires co-learning of imaging features from the complementary PET/MRI. We aim to develop an automated method for the segmentation of cancer-affected lymph nodes on Positron Emission Tomography/Magnetic Resonance Imaging (PET/MRI) using a modified Swin Transformer model (ST) integrated with a novel Multi-Scale Feature Fusion & Reorganization Module (MSFFRM). Our results with Hodgkin lymphoma (HL) and Non-Hodgkin lymphoma subtype Diffuse Large B-Cell Lymphoma (DLBCL) datasets show that our proposed model ST-MSFFRM achieved better performance in lesion segmentation in comparison to other state-of-the-art segmentation methods.

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