Diagnostic strategies for APE have evolved over the last several decades with the development of new methods. Initially, the time required for an MRI, and the lack of MRI-compatible monitoring devices hindered the broad clinical acceptance of this method. Recently, however, significant technical developments in pulmonary magnetic resonance angiography (MRA) have occurred. Improvements include the use of parallel imaging, time-resolved echo-shared angiography,2 and pulmonary perfusion. These techniques have shortened the acquisition time of MRA, improved spatial resolution, and made it less susceptible to motion artifacts.