ProstaTD: Bridging Surgical Triplet from Classification to Fully Supervised Detection

TL;DR

ProstaTD is a large, multi-institutional dataset with high-precision annotations for surgical triplet detection, enabling the transition from classification to full detection in surgical videos.

Contribution

The paper introduces ProstaTD, the largest annotated dataset for surgical triplet detection with precise spatial and temporal boundaries, developed through rigorous multi-institutional efforts.

Findings

Largest dataset with 71,775 frames and 196,490 triplet instances

Includes high-precision bounding boxes and temporal boundaries

Provides tools for annotation and standardized evaluation

Abstract

Surgical triplet detection is a critical task in surgical video analysis. However, existing datasets like CholecT50 lack precise spatial bounding box annotations, rendering triplet classification at the image level insufficient for practical applications. The inclusion of bounding box annotations is essential to make this task meaningful, as they provide the spatial context necessary for accurate analysis and improved model generalizability. To address these shortcomings, we introduce ProstaTD, a large-scale, multi-institutional dataset for surgical triplet detection, developed from the technically demanding domain of robot-assisted prostatectomy. ProstaTD offers clinically defined temporal boundaries and high-precision bounding box annotations for each structured triplet activity. The dataset comprises 71,775 video frames and 196,490 annotated triplet instances, collected from 21 surgeries performed across multiple institutions, reflecting a broad range of surgical practices and intraoperative conditions. The annotation process was conducted under rigorous medical supervision and involved more than 60 contributors, including practicing surgeons and medically trained annotators, through multiple iterative phases of labeling and verification. To further facilitate future general-purpose surgical annotation, we developed two tailored labeling tools to improve efficiency and scalability in our annotation workflows. In addition, we created a surgical triplet detection evaluation toolkit that enables standardized and reproducible performance assessment across studies. ProstaTD is the largest and most diverse surgical triplet dataset to date, moving the field from simple classification to full detection with precise spatial and temporal boundaries and thereby providing a robust foundation for fair benchmarking.