Volumetric Computed Tomography Angiography in the Evaluation of Mediastinal Fluid Collections following Congenital Cardiac Surgery
Figure 3
Seroma formation after modified Blalock-Taussig shunt. ECG-triggered volumetric contrast-enhanced cardiac CT (AquilionONE, Toshiba medical systems) is acquired in a single heart beat during systole at a heart rate of 127 beats per minute. Transverse orientation ((a)–(e)) and coronal orientation (f). 3 years old female patient after repair of pulmonary atresia by unifocalization and bilateral modified Blalock-Taussig shunt (BT). Extensive mediastinal fluid (F, all images) in the upper part of mediastinum. Note the excellent image quality showing the left BT shunt (L-BT, (a)) and right-BT shunt (R-BT, (b)), right coronary artery (RCA, (c)), left coronary artery (LCA, (d)), major aorta to pulmonary collateral arteries (MAPCA in c, (d)), and large subaortic ventricular septum defect (black arrow, (e)). The superior vena cava was severely compressed by the mediastinal fluid collection (white arrow, (f)). Ao: aorta; LV: left ventricle; RV: right ventricle. Dose-length product of the CT scan was 20.9 mGy·cm. Correction factor for chest CT at 100 kV for 3 years age was 0.039 mSv·mGy−1·cm−1; effective dose was 0.8 mSv.
