Search Results for author: Ahmed Abdulaal

Found 6 papers, 2 papers with code

DeCoRe: Decoding by Contrasting Retrieval Heads to Mitigate Hallucinations

1 code implementation24 Oct 2024 Aryo Pradipta Gema, Chen Jin, Ahmed Abdulaal, Tom Diethe, Philip Teare, Beatrice Alex, Pasquale Minervini, Amrutha Saseendran

Large Language Models (LLMs) often hallucinate, producing unfaithful or factually incorrect outputs by misrepresenting the provided context or incorrectly recalling internal knowledge.

Instruction Following Question Answering +1

An X-Ray Is Worth 15 Features: Sparse Autoencoders for Interpretable Radiology Report Generation

no code implementations4 Oct 2024 Ahmed Abdulaal, Hugo Fry, Nina Montaña-Brown, Ayodeji Ijishakin, Jack Gao, Stephanie Hyland, Daniel C. Alexander, Daniel C. Castro

Using an off-the-shelf language model, we distil ground-truth reports into radiological descriptions for each SAE feature, which we then compile into a full report for each image, eliminating the need for fine-tuning large models for this task.

Language Modelling Multimodal Reasoning

Disentangled Diffusion Autoencoder for Harmonization of Multi-site Neuroimaging Data

no code implementations28 Aug 2024 Ayodeji Ijishakin, Ana Lawry Aguila, Elizabeth Levitis, Ahmed Abdulaal, Andre Altmann, James Cole

Existing harmonization techniques, which use statistical models to remove such effects, have been shown to incompletely remove site effects while also failing to preserve biological variability.

Image Generation

Normative Diffusion Autoencoders: Application to Amyotrophic Lateral Sclerosis

no code implementations19 Jul 2024 Ayodeji Ijishakin, Adamos Hadjasavilou, Ahmed Abdulaal, Nina Montana-Brown, Florence Townend, Edoardo Spinelli, Massimo Fillipi, Federica Agosta, James Cole, Andrea Malaspina

To our knowledge, this is the first use of normative modelling within a diffusion autoencoder, as well as the first application of normative modelling to ALS.

Survival Prediction

A coupled-mechanisms modelling framework for neurodegeneration

no code implementations10 Aug 2023 Tiantian He, Elinor Thompson, Anna Schroder, Neil P. Oxtoby, Ahmed Abdulaal, Frederik Barkhof, Daniel C. Alexander

We account for the heterogeneity of disease by fitting the model at the individual level, allowing the epicenters and rate of progression to vary among subjects.

Feature Importance Model Selection

Interpretable Alzheimer's Disease Classification Via a Contrastive Diffusion Autoencoder

1 code implementation5 Jun 2023 Ayodeji Ijishakin, Ahmed Abdulaal, Adamos Hadjivasiliou, Sophie Martin, James Cole

Therefore, this work stands as a contribution to the pertinent development of accurate and interpretable deep learning within medical imaging.

Classification Deep Learning

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