arXiv Computer Vision

TAN: A Size- and Form-Adaptive Masked-Convolution Encoder for Tissue Graphs

TAN (Tissue‑Aware Network) is a lightweight convolutional encoder that processes tissue‑conforming superpixels in their native shape, avoiding background leakage from padding or masking. It achieves accuracy on the BACH histology dataset comparable to a 303‑million‑parameter foundation model while using only 0.41 M parameters and 1,190× fewer FLOPs, and its embeddings are invariant to the choice of fill value. On the BRACS dataset, TAN performs close to a ResNet18 trained under the same protocol and outperforms standard masked‑crop processing with less than half the computational cost.

arXiv AI
Oct 15

FETALFusion: Resolution-Aware State-Space Modeling for Multi-Domain Fetal Head Segmentation

FETALFusion is a dual‑path CNN‑Mamba encoder‑decoder designed for fetal head segmentation in 2D ultrasound across transabdominal and transperineal acquisition types. It uses four‑directional state‑space scans at the highest‑resolution stages, domain‑specific channel gates, and a weak landmark shape prior, achieving a Dice score of 0.963 and an HD95 of 2.10 mm on a held‑out test set of 471 images. Ablation studies show that the landmark prior and domain gates drive most of the performance gains, while the state‑space branch has minimal impact. whyItMatters":"The method provides highly accurate fetal head segmentation without test‑time augmentation or domain labels, enabling reliable head circumference measurement for monitoring fetal growth."

By Ammar Bhilwarawala, Mainak Bandyopadhyay
arXiv Machine Learning
Sep 21

Detection is solved, delineation is not: what governs tooth segmentation on panoramic radiographs

The study evaluates automatic tooth segmentation on panoramic radiographs using a large annotated corpus of 1,422 images and 42,142 tooth polygons. It finds that increasing input resolution improves boundary precision (mask mAP50‑95 rises from 0.656 to 0.717) while detection performance remains unchanged, and that architectural changes have minimal impact on in‑domain accuracy. Targeted interventions such as LoRA adaptation, promptable foundation models, and anatomical label assignment provide negligible gains, indicating that resolution and acquisition diversity should be prioritized over model novelty.

By Muhammad Rehan, Moaz Amjad, Syed Danial Ahmed, Mariam Adnan, Haider Ali