arteries, disease, sophiahayes 130624.jpg Axial MRI through the main pulmonary artery shows a transverse dimension 0f 2.2cms which is normalAshley Davidoff MD IDIOPATHIC PULMONARY HYPERTENSION71 year old female with long standing idiopathic pulmonary hypertension, and retroperitoneal fibrosis.Frontal X-ray shows an enlarged triangular shaped heart and a significantly enlarged main pulmonary artery.Ashley Davidoff MD IDIOPATHIC PULMONARY HYPERTENSION71 year old female with long standing idiopathic pulmonary hypertension, and retroperitoneal fibrosis.CT scan shows an enlarged main pulmonary artery (MPA) that measures 5.1cms at the level of the tubular portion of the ascending aorta.Ashley Davidoff MD IDIOPATHIC PULMONARY HYPERTENSION71 year old female with long standing idiopathic pulmonary hypertension, and retroperitoneal fibrosis.CT in the axial (a,b) coronal (c,d) and sagittal planes (e,f) show an enlarged right ventricle, (b,d,f teal arrowhead) normal sized right atrium (RA) and an atrial septum that is bulging only minimally toward the left and a significantly enlarged MPA (red arrowhead)The MPA is enlarged. The pulmonary valve is normal in thickness, thus excluding pulmonary stenosis.Ashley Davidoff MD ENLARGED LEFT PULMONARY ARTERY NORMAL RIGHT VENTRICLE AND ENCASEMENT OF UPPER LOBE BRANCH OF THE RIGHT PULMONARY ARTERY (RPA ) TGA of the GREAT VESSELS WITH SUBPULMONARY STENOSISCT of patient with an anterior aorta and a large posterior pulmonary artery TGA transposition 48320 48321 DTGACourtesy Dr Hyun Woo Goo from Korea and Dr Laureen Sena TGA of the GREAT VESSELS WITH SUBPULMONARY STENOSIS48321 CT of patient with an anterior aorta and a large posterior pulmonary artery TGA transposition heart aorta position 48320 48321 DTGA Courtesy Dr Hyun Woo Goo from Korea and Dr Laureen Sena Links and References Congenital pulmonary anomalies