"intersection of bronchus intermedius with the right heart border or inflection of the right heart border with the SVC contour 3note: superior right heart border may not always be formed by the right atrium and may be formed by the right atrial appendage or left atrium 4"
Expected headings
"Radiographic appearance"
"Plain radiograph"
"There is also an inferior cavoatrial junction at the junction between the inferior vena cava (IVC) and the right atrium. However this term is less commonly used/seen and generally cavoatrial junction, without qualification, is understood to mean the superior one."
"There are a variety of methods to estimate the position of the cavoatrial junction on chest radiographs:"