Difference Visual Question Answering in Medical Imaging Based on Multimodal Large Models and Enhanced by Prior Region-level Difference Descriptions
Difference Visual Question Answering (Diff-VQA) in medical imaging automatically compares patient images across time points to support assessment of lesion progression and treatment efficacy. However, pixel-level matching is unreliable due to non-rigid deformations, view shifts, and acquisition noise, while existing mo...