Fig. 3. Thoracic CT images of 4-month-old boy with repaired tracheoesophageal fistula.

Images are obtained using conventional helical acquisition method with sedation (A) and single-axial volume scan method without sedation (B) using 16-cm wide-detector CT scanner. A. Helical mode images show severe motion artifacts with blurring (arrowheads), especially near diaphragm (arrows). B. Axial volume scan images show relatively good image quality with few respiratory motion artifacts near diaphragm (arrows) and more clearly defined lung parenchymal structures, bronchi (arrowheads), vessels, and lung fissures.