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Table 1 Summary of the two radiology data sources

From: Finding relevant free-text radiology reports at scale with IBM Watson Content Analytics: a feasibility study in the UK NHS

EHR data sourceLeeds Teaching Hospitals NHS Trust, Leeds, UKBeth Israel Deaconess, Boston, MA, USA
# Patients~ 1 million~ 37,000
# Documents~ 5.6 million~ 0.5 million
Av. report length70 tokens206 tokens