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Abstract #1579

Deep learning voxelwise classification of primary central nervous system lymphoma using DSC-PWI normalized time-intensity curves

Alonso Garcia-Ruiz1, Albert Pons-Escoda2, Francesco Grussu1, Pablo Naval-Baudin2, Camilo Monreal1, Antonio Lopez-Rueda3, Laura Oleaga3, Carlos Majos2, and Raquel Perez-Lopez1
1Vall d'Hebron Institute of Oncology, Barcelona, Spain, 2Bellvitge University Hospital, L'Hospitalet de Llobregat, Spain, 3Hospital ClĂ­nic de Barcelona, Barcelona, Spain

Synopsis

The robustness and accuracy of current MR methods to differentiate brain tumours is limited. In this study we investigate the potential of dynamic susceptibility perfusion-weighted imaging (DSC-PWI) normalized time-intensity-curves (nTIC) to support lymphoma diagnosis by harnessing voxelwise and temporal information to train a convolutional neural network (CNN). This novel approach discriminated patients with lymphoma from glioblastoma and metastasis with an average accuracy of 0.94, using only a limited number of patients for training, outperforming standard DSC-PWI measurements. Furthermore, it provides voxel-by-voxel lymphoma probability maps to further help visual diagnosis of neuroradiologists.

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