Differential color imaging technique of helical computed tomographic angiography in an infant with the diagnosis of a supracardiac type of total anomalous pulmonary venous drainage.1 The anterior (left) and posterior (right) views are shown. After systemic and pulmonary arteries, systemic veins, and pulmonary veins were carefully demarcated according to the shape, continuity, and computed tomographic density of sequential tomographic images, the 3-dimensional image of each component was displayed in red, green, and blue, respectively. The 4 pulmonary veins (green) joined to form a vertical vein, which drained into the innominate vein. A severe stenosis (arrow) was found where the vertical vein passes across the dilated left pulmonary artery. Ao, Ascending aorta; dAo, descending aorta; PA, pulmonary artery; lPV, left pulmonary vein; rPV, right pulmonary vein; SVC, superior vena cava.
Isao Shiraishi, MD, PhD
Reference 1. Shiraishi I, Yamamoto Y, Ozawa S, Kawakita A, Toiyama K, Tanaka T, et al. Application of helical computed tomographic angiography with differential color imaging three-dimensional reconstruction in the diagnosis of complicated congenital heart diseases. J Thorac Cardiovasc Surg. 2003;125:36-9.
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