PMC:7473770 / 5844-6084 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T29","span":{"begin":0,"end":240},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Contrast is formed by transformation of the phase shifts into measurable intensity variations by self-interference of the exit wave during free-space propagation between sample and detector (Paganin and Nugent, 1998; Cloetens et al., 1999)."}