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From Petr Zalesky <pzale...@inferscience.com>
Subject Re: Chest pain absent. - polarity
Date Sat, 15 Nov 2014 22:39:39 GMT
Pei,

Thank you for your prompt response.  I downloaded the current released
binary about a week ago from http://ctakes.apache.org/downloads.cgi
(apache-ctakes-3.2.0-bin.tar.gz) so it would be the 3.2.0.  I will try the
3.2.1-rc1/trunk to see if it is makes any difference.

Best,

Petr

On Sat, Nov 15, 2014 at 5:16 PM, Pei Chen <chenpei@apache.org> wrote:

> Petr,
> Which version of cTAKES are you using? < 3.2.0 or latest 3.2.1-rc1/trunk?
> Both default to use a Machine Learning based polarity algorithm.  If it is
> missed, more training examples is probably the way to go.
> The latest one uses clearTK and trained with different features and
> training data so I would be curious to see if that one picks up your
> examples.
>
> On Sat, Nov 15, 2014 at 11:04 AM, Petr Zalesky <pzalesky@inferscience.com>
> wrote:
>
> > I have been investigating how polarity on a sign/symptom gets set and ran
> > into interesting issue. If a physician's note in a history of present
> > illness (HPI) says something like:
> >
> > “Absence of chest pain.”
> >
> > “Denied chest pain.”
> >
> > “Chest pain resolved.”
> >
> > Then cTAKES picks up the term "chest pain", assigns it the correct SNOMED
> > codes and sets the polarity to -1.  However, some of the de-identified
> > samples say:
> >
> > "Chest pain absent."
> >
> > In this case it is also picked up by cTAKES but in this case the polarity
> > is set to positive one (1).  I have been trying to figure out if there
> is a
> > way to configure cTAKES to detect that.  Any suggestions?
> >
>



-- 
Petr Zalesky
CTO
Inferscience, Inc

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