%0 Journal Article %A Lakhani, Paras %A Mongan, J %A Singhal, C %A Zhou, Q %A Andriole, K P %A Auffermann, W F %A Prasanna, P M %A Pham, T X %A Peterson, Michael %A Bergquist, P J %A Cook, T S %A Ferraciolli, S F %A Corradi, G C A %A Takahashi, M S %A Workman, C S %A Parekh, M %A Kamel, S I %A Galant, J %A Mas-Sanchez, A %A Benítez, E C %A Sánchez-Valverde, M %A Jaques, L %A Panadero, M %A Vidal, M %A Culiañez-Casas, M %A Angulo-Gonzalez, D %A Langer, S G %A de la Iglesia-Vayá, María %A Shih, G %T The 2021 SIIM-FISABIO-RSNA Machine Learning COVID-19 Challenge: Annotation and Standard Exam Classification of COVID-19 Chest Radiographs. %D 2022 %U http://hdl.handle.net/10668/20430 %X 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. %K Artificial Intelligence %K COVID-19 %K Machine Learning %K Pneumonia %K Radiography %K Thorax %~