Abstract:
OBJECTIVE:This study was designed to develop an automated system for quantification of various regional disease patterns of diffuse lung diseases as depicted on high-resolution computed tomography (HRCT) and to compare the performance of the automated system with human readers. MATERIALS AND METHODS:A total of 600 circular regions-of-interest (ROIs), 10 pixels in diameter, were utilized. The 600 ROIs comprised 100 ROIs that represented six typical regional patterns (normal, ground-glass opacity, reticular opacity, honeycombing, emphysema, and consolidation). The ROIs were used to train the automated classification system based on the use of a Support Vector Machine classifier and 37 features of texture and shape. The performance of the classification system was tested with a 5-fold cross-validation method. An automated quantification system was developed with a moving ROI in the lung area, which helped classify each pixel into six categories. A total of 92 HRCT images obtained from patients with different diseases were used to validate the quantification system. Two radiologists independently classified lung areas of the same CT images into six patterns using the manual drawing function of dedicated software. Agreement between the automated system and the readers and between the two individual readers was assessed. RESULTS:The overall accuracy of the system to classify each disease pattern based on the typical ROIs was 89%. When the quantification results were examined, the average agreement between the system and each radiologist was 52% and 49%, respectively. The agreement between the two radiologists was 67%. CONCLUSION:An automated quantification system for various regional patterns of diffuse interstitial lung diseases can be used for objective and reproducible assessment of disease severity.
journal_name
Korean J Radioljournal_title
Korean journal of radiologyauthors
Park SO,Seo JB,Kim N,Park SH,Lee YK,Park BW,Sung YS,Lee Y,Lee J,Kang SHdoi
10.3348/kjr.2009.10.5.455subject
Has Abstractpub_date
2009-09-01 00:00:00pages
455-63issue
5eissn
1229-6929issn
2005-8330journal_volume
10pub_type
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journal_title:Korean journal of radiology
pub_type: 杂志文章
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journal_title:Korean journal of radiology
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journal_title:Korean journal of radiology
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更新日期:2014-01-01 00:00:00
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pub_type: 指南,杂志文章
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journal_title:Korean journal of radiology
pub_type: 杂志文章
doi:10.3348/kjr.2007.8.2.127
更新日期:2007-03-01 00:00:00
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journal_title:Korean journal of radiology
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doi:10.3348/kjr.2002.3.3.158
更新日期:2002-07-01 00:00:00