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Extraction of Recommendation Features in Radiology with Natural Language Processing: Exploratory Study

Pragya A. Dang1, Mannudeep K. Kalra1, Michael A. Blake1, Thomas J. Schultz1, Elkan F. Halpern1 and Keith J. Dreyer1

1 All authors: Department of Radiology, Massachusetts General Hospital, 25 New Chardon St., Ste. 400E, Boston, MA 02114.


Figure 1
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  		Fig. 1 —Bar diagram shows percentage of reports (y-axis) with recommended imaging technique (x-axis) in 10-year database from 1995 to 2004. Most frequently recommended technique was CT (27.9% of reports) followed by MRI (17.8%), radiography (17.5%), and sonography (10.6%).

 

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  		Fig. 2 —Line graph shows distribution of imaging techniques recommended (y-axis) for different age groups (x-axis). Trend in recommendations of CT examinations increased with age. Recommendations of MRI remained stable among age groups. Recommendations of sonography showed decline after 40 years.

 

Figure 3
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  		Fig. 3 —Pie charts show recommendation patterns in inpatient (A) and outpatient (B) radiology reports. Nonimaging recommendations were most frequent in both groups. Among imaging recommendations, radiography was more frequently recommended for inpatients than for outpatients.

 

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Figure 5
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  		Fig. 4 —Line graph shows temporal trends for recommended imaging techniques (y-axis) from 1995 to 2004 (x-axis). Recommendations of CT, MRI, and sonography increased, but recommendations of radiography decreased.

 

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