Table 3.

Description and explanation of the false positives (n = 9) and false negative (n = 1) from the final query

False positives (n = 9)
Sentence in report	Explanation
Specific MRCP sequences were not included in this study however there is concern as was noted on prior CT scan for pancreatic divisum however no significant pancreatic ductal dilation is noted.	Complex sentence structure: multiple negation terms in the same sentence
There is homogenous enhancement of the pancreas without surrounding inflammatory changes or pancreatic ductal dilatation.	Complex sentence structure: algorithm did not identify an association between ‘without’ and ‘pancreatic ductal dilatation’
Linear calcific density measuring 10 x 3 mm (axial image 43) is present within the pancreatic body, unchanged since prior exam, unlikely to be present within the pancreatic duct given no pancreatic ductal dilatation.	Complex sentence structure: sentence structure that causes algorithm pre-processing to fail.
Abdominal CT scan on 11/94 showed a large pancreas, no abscess, pseudocyst or phlegmon and she retained some contrast in the gallbladder.	Complex sentence structure: confusing sentence formation.
There is a vague area of decreased attenuation seen within the body of the pancreas no evidence of pancreatic ductal dilation or peripancreatic inflammation.	Missing punctuation: missing of a period after ‘pancreas’
No evidence of complicating features or pseudocyst formation.	Complex sentence structure
Peripancreatic inflammatory changes with no appreciated pancreatic mass, pseudocyst or calcifications.	Complex sentence structure: algorithm did not identify an association between ‘no’ and ‘pseudocyst’.
Transcribed by – PSC Transcription Date – < Date> RADIOLOGY IMPRESSION CT Abdomen and Pelvis: Acute pancreatitis, improved compared to prior examination of May 2005, without evidence of necrosis, pseudocyst, or abscess.	Punctuation error: presence of special characters such as colons gives a different structure to this sentence
Previously seen pseudocyst in the neck of the pancreas is no longer appreciated.	Complex sentence structure: algorithm identified an association between ‘no’ and ‘appreciated’ but not with ‘pseudocyst’
False negatives (n = 1)
Sentence in report	Explanation
There is a fluid collection near the fundus of the stomach, without definite wall indicates pseudocyst.	Complex sentence structure and dictation error: one word missing before ‘indicates’