Bronchial wall thickness: appropriate window settings for thin-section CT and radiologic-anatomic correlation

摘要: PURPOSE: To analyze the influence of computed tomographic (CT) window settings on bronchial wall thickness and to define appropriate for its evaluation. MATERIALS AND METHODS: Three inflation-fixed lungs were scanned with a section 1.5 mm by using high-spatial-frequency algorithm. Wall in 10 specimens was measured planimetry. Window centers altered range -200 -900 HU widths 400-1,500 HU. Relative absolute differences between CT planimetric values calculated. measures correlated. Inter- intraobserver variabilities determined. RESULTS: less than 1,000 resulted substantial overestimation thickness, whereas greater 1,400 an underestimation thickness. There no interaction "width" "center" regarding their walls (F = 0.23; P .99). Correlation betwe...