1. To learn about the different etiologies of pulmonary hypertension and their specific imaging findings. 2. To learn about a comprehensive concept for imaging and reporting pulmonary hypertension. 3. To become familiar with the dedicated evaluation of right heart function. Whenever a diagnostic x-ray examination of a pregnant patient is considered to be necessary, conceptus dose estimation is an important step in assessing the risks to the unborn child. Accurate estimation of conceptus dose is also needed after inadvertent irradiation of a pregnant patient from a diagnostic x-ray procedure.