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Annotating for Artificial Intelligence Applications in Digital Pathology: A Practical Guide for Pathologists and
Diana Montezuma1, Sara P Oliveira2, Pedro C Neto2
1IMP Diagnostics, Porto, Portugal; Cancer Biology and Epigenetics Group, Research Center of IPO Porto (CI-IPOP)/RISE@CI-IPOP (Health Research Network), Portuguese Oncology Institute of Porto (IPO Porto)/Porto Comprehensive Cancer Center (Porto.CCC), Porto, Portugal; Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, Porto, Portugal.
This guide offers practical strategies for annotating data in computational pathology to improve artificial intelligence (AI) model development. It addresses common challenges and provides principles for pathologists and AI developers.
Area of Science:
- Pathology
- Artificial Intelligence
- Machine Learning
Background:
- Training machine learning models for AI in pathology requires extensive expert annotation.
- There is a lack of standardized guidance for this annotation process.
- Annotation methodologies vary based on study objectives, yet common difficulties persist.
Purpose of the Study:
- To describe experiences and provide a practical guide for annotation strategies in computational pathology AI development.
- To address common difficulties encountered during the annotation process.
- To assist pathologists, researchers, and AI developers in pathology annotation.
Main Methods:
- Summarizing key aspects of annotation methodology.
- Issuing guiding principles for team interaction and ground-truth quality assessment.
- Discussing different annotation types, software, and hardware options.
Main Results:
- A practical guide for annotation strategies in computational pathology.
- Identification of common difficulties and solutions.
- Principles for effective team collaboration and quality control.
Conclusions:
- Effective annotation is crucial for successful AI development in pathology.
- This guide provides a framework to overcome common annotation challenges.
- It aims to enhance the quality and efficiency of pathology data annotation for AI.

