PMC:7782580 / 5178-5349 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T34","span":{"begin":63,"end":151},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"contrast with different shades of gray (about 32–64 levels)17. The CT images are digitally processed18 to create a three-dimensional image of the body. However, CT examina"}