KK
Konstantinos Kamnitsas
cs.CVcs.LGcs.AIeess.IVNeural Networks, Computerstat.MLDeep learningMagnetic Resonance Imagingcs.CLDeep Learning
On Valency
published · living versionsW_f7a8nd2h·v1 · currentpublished
Counterfactual Marginalisation: Framework for Evaluating Robustness to Nuisance Variables
with Yasin Ibrahim, Hermione Warr, Robin J. Evans
1 version
W_ctyr365s·v1published
Preprints & journals
74 papers in the corpus · 2016–2026Uncertainty as a Proxy for Semantic Correctness in Diffusion-Based Medical Image Synthesis2610.03224v1 · Yuxuan Ou, Konstantinos Kamnitsas, OxAAA Study et al.2026 · 0 citationsarXiv
BrainIAC: Interactive 3D Brain Lesion Segmentation across Heterogeneous MRI Modalities with Online Adaptation2609.23026v1 · Wentian Xu, Anthony P Addison, Ziyun Liang et al.2026 · 0 citationsarXiv
To do() or not to do(): Medical Image Counterfactuals for Dataset Augmentation2609.14124v1 · Yasin Ibrahim, Robin J. Evans, Konstantinos Kamnitsas2026 · 0 citationsarXiv
Counterfactual Marginalisation: Framework for Evaluating Robustness to Nuisance Variables2609.10778v1 · Yasin Ibrahim, Hermione Warr, Robin J. Evans et al.2026 · 0 citationsarXivon Valency
Error Detection for PET/CT Radiology Reports: Domain-Specific vs Large Language Models2608.30021v2 · Hermione Warr, Harry Anthony, Lilli J Freischem et al.2026 · 0 citationsarXiv
The Invisible Gorilla Effect in Out-of-distribution Detection2602.20068v1 · Harry Anthony, Ziyun Liang, Hermione Warr et al.2026 · 0 citationsarXiv
Unsupervised Domain Adaptation via Content Alignment for Hippocampus Segmentation2510.13075v1 · Hoda Kalabizadeh, Ludovica Griffanti, Pak-Hei Yeung et al.2025 · 2 citationsarXiv
Modality-Agnostic Input Channels Enable Segmentation of Brain lesions in Multimodal MRI with Sequences Unavailable During Training2509.09290v1 · Anthony P. Addison, Felix Wagner, Wentian Xu et al.2025 · 0 citationsarXiv
IterMask3D: Unsupervised anomaly detection and segmentation with test-time iterative mask refinement in 3D brain MRI.40945172 · Liang, Ziyun, Guo, Xiaoqing, Xu, Wentian et al.2025 · 3 citationsMedical image analysis. 2026;107(Pt A):103763
Specialised or Generic? Tokenization Choices for Radiology Language Models2508.09952v1 · Hermione Warr, Wentian Xu, Harry Anthony et al.2025 · 0 citationsarXiv
DIsoN: Decentralized Isolation Networks for Out-of-Distribution Detection in Medical Imaging2506.09024v2 · Felix Wagner, Pramit Saha, Harry Anthony et al.2025 · 0 citationsarXiv
IterMask3D: Unsupervised Anomaly Detection and Segmentation with Test-Time Iterative Mask Refinement in 3D Brain MR2504.04911v2 · Ziyun Liang, Xiaoqing Guo, Wentian Xu et al.2025 · 0 citationsarXiv
You Point, I Learn: Online Adaptation of Interactive Segmentation Models for Handling Distribution Shifts in Medical Imaging2503.06717v4 · Wentian Xu, Ziyun Liang, Harry Anthony et al.2025 · 0 citationsarXiv
Radiomics for Treatment Planning in Liver Cancers.40009391 · Mian, Areeb, Kamnitsas, Konstantinos, Gordon-Weeks, Alex2025 · 5 citationsJAMA surgery. 2025
FedPIA -- Permuting and Integrating Adapters leveraging Wasserstein Barycenters for Finetuning Foundation Models in Multi-Modal Federated Learning2412.14424v1 · Pramit Saha, Divyanshu Mishra, Felix Wagner et al.2024 · 10 citationsarXiv
SPA: Efficient User-Preference Alignment against Uncertainty in Medical Image Segmentation2411.15513v2 · Jiayuan Zhu, Junde Wu, Cheng Ouyang et al.2024 · 1 citationarXiv
FOCUS -- Federated Finetuning of Vision-Language Foundation Models with Optimal Client Layer Updating Strategy via Multi-objective Meta-Heuristics2411.11912v2 · Pramit Saha, Felix Wagner, Divyanshu Mishra et al.2024 · 0 citationsarXiv
Evaluating Reliability in Medical DNNs: A Critical Analysis of Feature and Confidence-Based OOD Detection2408.17337v1 · Harry Anthony, Konstantinos Kamnitsas2024 · 1 citationarXiv
Is Your Style Transfer Doing Anything Useful? An Investigation Into Hippocampus Segmentation and the Role of Preprocessing10.1101/2024.08.22.24312425v1 · Kalabizadeh, H., Griffanti, L., Yeung, P. H. et al.2024 · 1 citationmedRxiv
Quality Control for Radiology Report Generation Models via Auxiliary Auditing Components2407.21638v1 · Hermione Warr, Yasin Ibrahim, Daniel R. McGowan et al.2024 · 1 citationarXiv
An Organism Starts with a Single Pix-Cell: A Neural Cellular Diffusion for High-Resolution Image Synthesis2407.03018v1 · Marawan Elbatel, Konstantinos Kamnitsas, Xiaomeng Li2024 · 5 citationsarXiv
Feasibility of Federated Learning from Client Databases with Different Brain Diseases and MRI Modalities2406.11636v3 · Felix Wagner, Wentian Xu, Pramit Saha et al.2024 · 9 citationsarXiv
IterMask2: Iterative Unsupervised Anomaly Segmentation via Spatial and Frequency Masking for Brain Lesions in MRI2406.02422v2 · Ziyun Liang, Xiaoqing Guo, J. Alison Noble et al.2024 · 0 citationsarXiv
Feasibility and benefits of joint learning from MRI databases with different brain diseases and modalities for segmentation2405.18511v1 · Wentian Xu, Matthew Moffat, Thalia Seale et al.2024 · 1 citationProceedings of Machine Learning Research, MIDL 2024
Semi-Supervised Learning for Deep Causal Generative Models2403.18717v2 · Yasin Ibrahim, Hermione Warr, Konstantinos Kamnitsas2024 · 4 citationsarXiv
As Firm As Their Foundations: Can open-sourced foundation models be used to create adversarial examples for downstream tasks?2403.12693v1 · Anjun Hu, Jindong Gu, Francesco Pinto et al.2024 · 0 citationsarXiv
Examining Modality Incongruity in Multimodal Federated Learning for Medical Vision and Language-based Disease Detection2402.05294v1 · Pramit Saha, Divyanshu Mishra, Felix Wagner et al.2024 · 3 citationsarXiv
Joint Optimization of Class-Specific Training- and Test-Time Data Augmentation in Segmentation.37276115 · Li, Zeju, Kamnitsas, Konstantinos, Dou, Qi et al.2023 · 9 citationsIEEE transactions on medical imaging. 2023;42(11):3323-3335
On the use of Mahalanobis distance for out-of-distribution detection with neural networks for medical imaging2309.01488v1 · Harry Anthony, Konstantinos Kamnitsas2023 · 15 citationsarXiv
Post-Deployment Adaptation with Access to Source Data via Federated Learning and Source-Target Remote Gradient Alignment2308.16735v1 · Felix Wagner, Zeju Li, Pramit Saha et al.2023 · 6 citationsarXiv
Modality Cycles with Masked Conditional Diffusion for Unsupervised Anomaly Segmentation in MRI2308.16150v3 · Ziyun Liang, Harry Anthony, Felix Wagner et al.2023 · 17 citationsarXiv
Context Label Learning: Improving Background Class Representations in Semantic Segmentation.37022408 · Li, Zeju, Kamnitsas, Konstantinos, Ouyang, Cheng et al.2023 · 20 citationsIEEE transactions on medical imaging. 2023;42(6):1885-1896
A Review of the Metrics Used to Assess Auto-Contouring Systems in Radiotherapy.36803407 · Mackay, K, Bernstein, D, Glocker, B et al.2023 · 86 citationsClinical oncology (Royal College of Radiologists (Great Britain)). 2023;35(6):354-369
Author Correction: Federated learning enables big data for rare cancer boundary detection.36702828 · Pati, Sarthak, Baid, Ujjwal, Edwards, Brandon et al.2025 · 5 citationsNature communications. 2023;14(1):436
Federated learning enables big data for rare cancer boundary detection.36470898 · Pati, Sarthak, Baid, Ujjwal, Edwards, Brandon et al.2022 · 390 citationsNature communications. 2022;13(1):7346
Estimating Model Performance under Domain Shifts with Class-Specific Confidence Scores2207.09957v1 · Zeju Li, Konstantinos Kamnitsas, Mobarakol Islam et al.2022 · 15 citationsarXiv
Distributional Gaussian Processes Layers for Out-of-Distribution Detection2206.13346v1 · Sebastian G. Popescu, David J. Sharp, James H. Cole et al.2022 · 0 citationsarXiv
Transductive image segmentation: Self-training and effect of uncertainty estimation2107.08964v3 · Konstantinos Kamnitsas, Stefan Winzeck, Evgenios N. Kornaropoulos et al.2021 · 2 citationsarXiv
Learning from Partially Overlapping Labels: Image Segmentation under Annotation Shift2107.05938v1 · Gregory Filbrandt, Konstantinos Kamnitsas, David Bernstein et al.2021 · 4 citationsarXiv
Confidence-based Out-of-Distribution Detection: A Comparative Study and Analysis2107.02568v1 · Christoph Berger, Magdalini Paschali, Ben Glocker et al.2021 · 42 citationsarXiv
Distributional Gaussian Process Layers for Outlier Detection in Image Segmentation2104.13756v1 · Sebastian G. Popescu, David J. Sharp, James H. Cole et al.2021 · 9 citationsarXiv
Deep neural network to locate and segment brain tumors outperformed the expert technicians who created the training data.33102623 · Mitchell, Joseph Ross, Kamnitsas, Konstantinos, Singleton, Kyle W et al.2021 · 15 citationsJournal of medical imaging (Bellingham, Wash.). 2020;7(5):055501
Image-level Harmonization of Multi-Site Data using Image-and-Spatial Transformer Networks2006.16741v1 · R. Robinson, Q. Dou, D.C. Castro et al.2020 · 23 citationsMedical Image Computing and Computer-Assisted Intervention (2020), pp. 710-719, LNCS 12267
Stochastic Segmentation Networks: Modelling Spatially Correlated Aleatoric Uncertainty2006.06015v2 · Miguel Monteiro, Loic Le Folgoc, Daniel Coelho de Castro et al.2020 · 88 citationsarXiv
Multiclass semantic segmentation and quantification of traumatic brain injury lesions on head CT using deep learning: an algorithm development and multicentre validation study.33328125 · Monteiro, Miguel, Newcombe, Virginia F J, Mathieu, Francois et al.2021 · 162 citationsThe Lancet. Digital health. 2020;2(6):e314-e322
Relationship between Measures of Cerebrovascular Reactivity and Intracranial Lesion Progression in Acute Traumatic Brain Injury Patients: A CENTER-TBI Study.31928143 · Mathieu, François, Zeiler, Frederick A, Ercole, Ari et al.2021 · 26 citationsJournal of neurotrauma. 2020;37(13):1556-1565
Explainable Anatomical Shape Analysis Through Deep Hierarchical Generative Models.31944949 · Biffi, Carlo, Cerrolaza, Juan J, Tarroni, Giacomo et al.2021 · 7 citationsIEEE transactions on medical imaging. 2020;39(6):2088-2099
Domain Generalization via Model-Agnostic Learning of Semantic Features1910.13580v1 · Qi Dou, Daniel C. Castro, Konstantinos Kamnitsas et al.2019 · 490 citationsarXiv
Overfitting of neural nets under class imbalance: Analysis and improvements for segmentation1907.10982v2 · Zeju Li, Konstantinos Kamnitsas, Ben Glocker2019 · 111 citationsarXiv
Data Efficient Unsupervised Domain Adaptation for Cross-Modality Image Segmentation1907.02766v2 · Cheng Ouyang, Konstantinos Kamnitsas, Carlo Biffi et al.2019 · 108 citationsarXiv
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