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Table 2 Automated filtering steps to remove irrelevant publications

From: A systematic review of natural language processing applied to radiology reports

Automated filtering steps
1. Document language is English
2. Word ’patent’ in title or URL
3. Year of publication out of range (<2015)
4. The words ’review’ or ’overview’ in the title, ’this review’ in the abstract
5. Image keywords in title or abstract with no NLP terminology in abstract
6. No radiology keywords in title or abstract
7. No NLP terminology in abstract