Sean, Thank you for information.
I was reading the document. So, the MaxLeftScopeSize and MaxRightScopeSize are limit up to 10? Is there anyway to adjust it without modify the source code? https://cwiki.apache.org/confluence/display/CTAKES/cTAKES+4.0+-+NE+Contexts Thanks again, Kathy On Tue, Nov 28, 2017 at 9:31 AM, Finan, Sean < sean.fi...@childrens.harvard.edu> wrote: > Hi Kathy, > > The negation annotator used in the default clinical pipeline is based upon > machine learning and trained on real data. It is possible that such > "denies" lists were underrepresented in the training data. One thing that > you can try is adding another negation annotator. The ContextAnnotator in > ctakes-ne-contexts will add negation to terms without removing existing > negation. It also has configurable scope/distance that may be helpful. > > To use this, create a new piper file containing the two lines > > load DefaultFastPipeline > add ContextAnnotator MaxLeftScopeSize=10 MaxRightScopeSize=10 > > The default scope sizes are 7, but increasing the MaxRight* might help > with your "denies" discoveries. 7 might be ok for the left, so feel free > to remove "MaxLeftScopeSize=10" from the line. > > Then run your piper file (command line, gui, maven profile, etc.) > https://cwiki.apache.org/confluence/display/CTAKES/Piper+Files > > Sean > > -----Original Message----- > From: Kathy Ferro [mailto:healthcare1...@gmail.com] > Sent: Monday, November 27, 2017 8:10 PM > To: dev@ctakes.apache.org > Subject: polarity tag in output for mention/concept. [EXTERNAL] > > Good evening, > > I ran a few sentences through default clinical pipeline. > > It really reliable if it's only one term after negative, but I am get > in-consistent value for polarity for the list of terms. Please see example > below. > > 1. denies fatigue, malaise, fever, weight loss > SignSymthomMention: > polarity = -1: fatigue, malaise,fever > polarity = 1: weight loss. > Why does weight loss got single out? > > 2. denies ear pain or discharge, nasal obstruction or discharge, sore > throat > polarity = -1: ear pain or discharge > polarity = 1: nasal obstruction or discharge, obstruction, sore throat > Doesn't even acknowledge the list. > > 3. denies back pain, joint swelling, joint stiffness, joint pain > polarity = -1: back pain, Swelling > polarity = 1: Joint swelling, Stiffness, pain What! totally messy the > pattern. > > 4. denied back pain, joint swelling, joint stiffness, joint pain > Ok, may be it doesn't like the word denies; I changed to denied, deny, > etc.. > polarity = -1 : Swelling > everything else is 1. > > > My question is: > How do I handle the negative claims in the document? > > Thank you > Kathy >
