Figure 2: Examples of IMT measurement in patients with and without PAH.
From: Optical coherence tomography evaluation of pulmonary arterial vasculopathy in Systemic Sclerosis

Clearly defined structure at outer border. All three pictures demonstrate eccentric IMT thickening with difficult delineation towards adventitia. Coloured tracings represent endoluminal contours. (a) SSc, no PAH. IMT 0.10 mm (measurement “C”). PA mean 19 mmHg (b) SSc-PAH. IMT 0.27 mm (measurement “B”). mPAP 61 mmHg (c) SSc-PAH. IMT 0.15 mm (measurement “B”). mPAP 46 mmHg.