Black-Blood Cinematic Rendering of the Pulmonary Vasculature: A Negative-Contrast Intraluminal Preset

Cinematic rendering (CR) is a physically based three-dimensional (3D) computed tomography (CT) visualization technique that has been applied chiefly to the external surface morphology of vascular structures. Intraluminal CR has previously been described for the cardiac chambers as black-blood cinematic rendering (BBCR), in which the opacity assigned to the contrast-enhanced blood pool is suppressed. Here, we describe the adaptation of that principle to the pulmonary vasculature as a negative-contrast intraluminal preset, in which the opacified blood pool is rendered semi-transparent so that the vessel lumen is displayed as a low-signal channel delineated by the enhancing vessel wall. We report the acquisition and rendering conditions under which the appearance was obtained in a single illustrative case performed for chest pain and showing no pulmonary vascular pathology, together with the rendering platform, base preset, and lighting configuration; the attenuation-band settings that define the appearance were tuned for the individual examination rather than applied as a fixed parameter set, were not recorded, and cannot be supplied as numerical values, so a stepwise construction procedure is given in their place. Intermediate rather than maximal compartment-specific opacification was required for the transfer function to separate lumen from wall; the case presented was acquired in an early pulmonary arterial phase, and a late split-bolus acquisition is an alternative route to the same condition that was not used here. In the case presented, the lumen of segmental and up to third-order subsegmental pulmonary arterial and venous branches was visually demonstrated on qualitative assessment by a single reader, and the preset remained stable when applied unchanged across the reconstructed 40–80% R–R window for four-dimensional display, which is a partial rather than a complete cardiac cycle reconstruction. Preset construction was less successful at the central pulmonary arteries and veins, where dense opacification and proximity to the cardiac blood pool reduced the contrast available to the transfer function. This is a single-case technical description. It demonstrates that the appearance can be produced under defined conditions and sets out the procedure by which it was constructed; it does not establish that the exact parameter values are recoverable or transferable, and it does not establish diagnostic performance, which will require prospective comparison against conventional reformats in adequately powered studies.