CT and MR imaging of the pulmonary valve.

With rapid advancements in imaging technology, cardiac computed tomography (CT) and magnetic resonance (MR) imaging are increasingly being used for anatomic evaluation, functional assessment, and pathologic diagnosis of the pulmonary valve and right ventricle. MR imaging is especially helpful in evaluating postoperative pulmonary valve function and grading of pulmonary regurgitation. On the other hand, CT has the advantage of high-resolution isovolumetric whole-chest coverage and is able to depict anatomic detail of the pulmonary valve, perivalvular structures, and pulmonary artery branches.