Which of the following is investigation of choice for Congenital Lobar Emphysema?

Ans. B. Helical CTCongenital lobar emphysemaa. Progressive over inflation of one or multiple lobes, usually of the upper lobes or right middle lobe.b. Left upper lobe is most commonly affected (43%).c. The word emphysema is misnomer as there is no alveolar wall destructiond. The etiology is unknown in many cases but is related to obstruction of the bronchus by a ball valve mechanisme. Present with respiratory distress (90%) with progressive cyanosis within 6 months of life.f. Associated congenital anomalies (cardiovascular) are seen in 50% casesg. Treatment is by lung resection