For COVID-19 patients the common stage in diagnosis is computer tomography (CT). A radiologist is often asked to estimate the extent of damage with respect to lung volume. It is a time-consuming procedure, because radiologist should look through all axial slices on CT and segment each of them.

There are some COVID-specific findings: [https://radiologyassistant.nl/chest/covid-19-corads-classification](https://radiologyassistant.nl/chest/covid-19-corads-classification). In this challenge you are asked to segment "ground-glass" and "consolidation".

The goal of this challenge is to help companies, who are building CT-specific software, come up with better solutions.