PMC:7782580 / 5120-5240 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T33","span":{"begin":0,"end":120},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"CT differs from normal CXR in that it has superior tissue contrast with different shades of gray (about 32–64 levels)17."}