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. 2012 Nov;85(1019):1446–1456. doi: 10.1259/bjr/28150079

Figure 2.

Figure 2

A 45-year-old female with idiopathic pulmonary arterial hypertension. Similar imaging aspects in multidetector CT angiography (MDCTA)-derived maximum intensity projection (MIP) (a), MR angiography (MRA)-derived MIP (b), MDCTA-derived multiplanar reconstruction (MPR) (c) and coloured MRA-derived MPR (d) show marked dilatation of the pulmonary artery main stem (white asterisk) and the right pulmonary artery (black asterisk), proximal calibre changes (pruned tree sign; white arrows on a, b), peripheral vessel reduction and vessel tortuosity (white circles on a, b). No occlusive criteria are visible in MRA or MDCTA images.