Amfizemin yüksek rezolüsyonlu bilgisayarlı tomografi incelemesinde görsel skorlama: gözlemci içi ve gözlemciler arasında korelasyon
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2012
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info:eu-repo/semantics/openAccess
Özet
Amaç: Amfizem değerlendirmesinde genellikle hard-copy film veya BT ekranı üzerinde subjektif görsel değerlendirme kullanılmaktadır. Bu yöntemde gözlemciler arası ve gözlemci içi uyumsuzluk kantitatif analizlere oranla yüksektir. Bu çalışmanın amacı density mask yöntemi kullanılarak segmentasyon analizi ile elde edilen amfizematöz parankim görüntüleri ile konvansiyonel görüntülerin gözlemciler arası ve gözlemci içi subjektif skorlamaya etkisini araştırmaktır. Gereç ve Yöntem: Çalışmada 10’u amfizemli 7’si sağlıklı birey incelendi. YRBT kesitleri iki gözlemci tarafından standart hard-copy filmden ve amfizematöz parankim pencerelerinde amfizemin yaygınlığı ve şiddeti olmak üzere skorlandı. Her hastada total amfizem skorları hesaplandı ve gözlemciler arası ve gözlemci içi korelasyona bakıldı. Bulgular: Gözlemcilerin yaptıkları skorlamada; yaygınlık skorlarında 19 skorda, şiddet skorlarında 30 skorda artış izlendi. Gözlemciler arasında hem konvansiyonel hem de segmentasyon penceresinde korelasyon vardı. Ayrıca gözlemciler arası korelayona benzer şekilde gözlemci içi korelasyon da izlendi. Sonuç: Amfizemli hastalarda YRBT incelemesinin amfizematöz parankim penceresinde görsel skorlanması kolay uygulanabilir bir metodolojidir. Bu metod ile gözlemciler arasındaki uyum artmakta ve gözlemcilerin tekrar eden değerlendirmelerindeki uyumsuzluk azaltmaktadır.
Purpose: The subjective visual assessment is usually used on the hard-copy film or CT monitor for assessment of emphysema. This method has a higher interobserver and intraobserver discrepancy than quantitative analyzes. In this study, the effect of interobserver and intraobserver discrepancy was investigated on subjective visual scoring of conventional images and emphysematous parenchyma images which is gained with the density mask method. Material and Methods: In this study, ten emphysematous patient and seven healthy subjects were examined. HRCT images were scored on the standard hard-copy film and emphysematous parenchymal window settings as the distribution and severity of emphysema by two observers. Total emphysema score was calculated for each patient and the interobserver and intraobserver correlations were evaluated. Results: An increase was observed in 19 scores of distribution and 30 scores of severity. The interobserver correlation was observed in both conventional images and emphysematous parenchyma images. In addition, an intraobserver correlation was also observed similar to interobserver correlation. Conclusion: The visual scoring methodology of patients with emphysema can be easily applicable in HRCT examination of emphysematous parenchymal window. Intraobserver correlation was increased, and the concordance was reduced in repeated assessments of physicians with this method.
Purpose: The subjective visual assessment is usually used on the hard-copy film or CT monitor for assessment of emphysema. This method has a higher interobserver and intraobserver discrepancy than quantitative analyzes. In this study, the effect of interobserver and intraobserver discrepancy was investigated on subjective visual scoring of conventional images and emphysematous parenchyma images which is gained with the density mask method. Material and Methods: In this study, ten emphysematous patient and seven healthy subjects were examined. HRCT images were scored on the standard hard-copy film and emphysematous parenchymal window settings as the distribution and severity of emphysema by two observers. Total emphysema score was calculated for each patient and the interobserver and intraobserver correlations were evaluated. Results: An increase was observed in 19 scores of distribution and 30 scores of severity. The interobserver correlation was observed in both conventional images and emphysematous parenchyma images. In addition, an intraobserver correlation was also observed similar to interobserver correlation. Conclusion: The visual scoring methodology of patients with emphysema can be easily applicable in HRCT examination of emphysematous parenchymal window. Intraobserver correlation was increased, and the concordance was reduced in repeated assessments of physicians with this method.
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1
