RT Journal Article T1 The 2021 SIIM-FISABIO-RSNA Machine Learning COVID-19 Challenge: Annotation and Standard Exam Classification of COVID-19 Chest Radiographs. A1 Lakhani, Paras A1 Mongan, J A1 Singhal, C A1 Zhou, Q A1 Andriole, K P A1 Auffermann, W F A1 Prasanna, P M A1 Pham, T X A1 Peterson, Michael A1 Bergquist, P J A1 Cook, T S A1 Ferraciolli, S F A1 Corradi, G C A A1 Takahashi, M S A1 Workman, C S A1 Parekh, M A1 Kamel, S I A1 Galant, J A1 Mas-Sanchez, A A1 Benítez, E C A1 Sánchez-Valverde, M A1 Jaques, L A1 Panadero, M A1 Vidal, M A1 Culiañez-Casas, M A1 Angulo-Gonzalez, D A1 Langer, S G A1 de la Iglesia-Vayá, María A1 Shih, G K1 Artificial Intelligence K1 COVID-19 K1 Machine Learning K1 Pneumonia K1 Radiography K1 Thorax AB We describe the curation, annotation methodology, and characteristics of the dataset used in an artificial intelligence challenge for detection and localization of COVID-19 on chest radiographs. The chest radiographs were annotated by an international group of radiologists into four mutually exclusive categories, including "typical," "indeterminate," and "atypical appearance" for COVID-19, or "negative for pneumonia," adapted from previously published guidelines, and bounding boxes were placed on airspace opacities. This dataset and respective annotations are available to researchers for academic and noncommercial use. YR 2022 FD 2022-09-28 LK http://hdl.handle.net/10668/20430 UL http://hdl.handle.net/10668/20430 LA en DS RISalud RD Apr 5, 2025