CT Pulmonary Angiography

The CT pulmonary angiogram (CTPA) can suggest the presence of PH by morphological changes such as right heart enlargement, increased pulmonary artery (PA) diameter – relative to the aorta – the presence of significant tricuspid regurgitation and a pericardial effusion.  It is useful in defining surgically treatable chronic thromboembolic disease, by showing features such as eccentric laminated thrombus, vessel amputation, webs, irregular vessels and bronchial artery dilatation.


Key scans from a CT Pulmonary Angiogram


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Figure 1.  CT pulmonary angiogram showing right heart enlargement 

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Figure 2.  CTPA showing increased diameter of the pulmonary artery


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Figure 3.  CTPA showing tricuspid regurgitation  

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Figure 4.  CTPA showing a pericardial effusion 

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Figure 5.  CTPA showing eccentric laminated thrombus 

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Figure 6.  CTPA showing irregular vessels 

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Figure 7.  CTPA showing a web 

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Figure 8.  CTPA showing bronchial artery dilation 

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Figure 9.  CT pulmonary angiogram showing mosaicism


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