Search Results for author: Diana M. Sima

Found 9 papers, 3 papers with code

Factorizer: A Scalable Interpretable Approach to Context Modeling for Medical Image Segmentation

2 code implementations24 Feb 2022 Pooya Ashtari, Diana M. Sima, Lieven De Lathauwer, Dominique Sappey-Marinier, Frederik Maes, Sabine Van Huffel

Specifically, we propose a linearly scalable approach to context modeling, formulating Nonnegative Matrix Factorization (NMF) as a differentiable layer integrated into a U-shaped architecture.

Brain Tumor Segmentation Image Segmentation +3

Differentiable Deconvolution for Improved Stroke Perfusion Analysis

no code implementations31 Mar 2021 Ezequiel de la Rosa, David Robben, Diana M. Sima, Jan S. Kirschke, Bjoern Menze

We show that our approach is able to generate AIFs without any manual annotation, and hence avoiding manual rater's influences.

Lesion Segmentation

An augmentation strategy to mimic multi-scanner variability in MRI

1 code implementation23 Mar 2021 Maria Ines Meyer, Ezequiel de la Rosa, Nuno Barros, Roberto Paolella, Koen van Leemput, Diana M. Sima

Most publicly available brain MRI datasets are very homogeneous in terms of scanner and protocols, and it is difficult for models that learn from such data to generalize to multi-center and multi-scanner data.

Data Augmentation

Unsupervised 3D Brain Anomaly Detection

no code implementations9 Oct 2020 Jaime Simarro, Ezequiel de la Rosa, Thijs Vande Vyvere, David Robben, Diana M. Sima

Moreover, we test the potential of the method for detecting other anomalies such as low quality images, preprocessing inaccuracies, artifacts, and even the presence of post-operative signs (such as a craniectomy or a brain shunt).

Anomaly Detection

AIFNet: Automatic Vascular Function Estimation for Perfusion Analysis Using Deep Learning

no code implementations4 Oct 2020 Ezequiel de la Rosa, Diana M. Sima, Bjoern Menze, Jan S. Kirschke, David Robben

Perfusion imaging is crucial in acute ischemic stroke for quantifying the salvageable penumbra and irreversibly damaged core lesions.

Clustering

Improved inter-scanner MS lesion segmentation by adversarial training on longitudinal data

no code implementations3 Feb 2020 Mattias Billast, Maria Ines Meyer, Diana M. Sima, David Robben

A discriminator model is then trained to predict if two lesion segmentations are based on scans acquired using the same scanner type or not, achieving a 78% accuracy in this task.

Lesion Segmentation

Relevance Vector Machines for harmonization of MRI brain volumes using image descriptors

no code implementations8 Nov 2019 Maria Ines Meyer, Ezequiel de la Rosa, Koen van Leemput, Diana M. Sima

In this work, we explore a novel approach to harmonize brain volume measurements by using only image descriptors.

A Radiomics Approach to Traumatic Brain Injury Prediction in CT Scans

no code implementations14 Nov 2018 Ezequiel de la Rosa, Diana M. Sima, Thijs Vande Vyvere, Jan S. Kirschke, Bjoern Menze

Relevant shape, intensity and texture biomarkers characterizing the different lesions are isolated and a lesion predictive model is built by using Partial Least Squares.

Decision Making Injury Prediction +2

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