High Resolution CT Thorax

High resolution CT scans of the thorax are important to exclude the presence of parenchymal lung disease such as emphysema or interstitial lung disease.  They may also lead to specific PH diagnoses such as pulmonary veno-occlusive disease (PVOD) [thickened interlobular septa, lymphadenopathy, pleural effusions and centrilobular ground glass nodules] or chronic thromboembolic pulmonary hypertension (CTEPH) [mosaicism and peripheral parenchymal opacities].  Ground glass changes are also seen in some people with PAH.

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Figure 1.  HRCT showing thickened interlobular septa in PVOD 

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Figure 2.  HRCT showing lymphadenopathy n PVOD 

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Figure 3.  HRCT showing centrilobular ground glass nodules in PVOD 

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Figure 4.  HRCT showing peripheral parenchymal opacities in CTEPH 

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