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haydengunraj / COVIDNet-CT

COVID-Net Open Source Initiative - Models and Data for COVID-19 Detection in Chest CT
https://alexswong.github.io/COVID-Net/
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CT labels #6

Closed AlexTS1980 closed 3 years ago

AlexTS1980 commented 4 years ago

I don't fully understand the labelling of the data. The paper says 'For NCP and CP CT volumes, slices marked as containing lung abnormalities were leveraged' - does it mean you only added scans that clearly display symptoms of (N)CP, leaving out slices without these symptoms?

haydengunraj commented 4 years ago

That's correct - in the original CNCB dataset, they provide a file called lesions_slices.csv which lists CT slices for which radiologists have observed lung lesions due to CP/NCP. We use only the slices listed in this file when constructing the COVIDx-CT dataset, as we cannot guarantee that other slices from CP/NCP volumes contain abnormalities. For normal control cases, we use all slices.