Technical drawing of the 5 mm stenosis-phantom.

<p>The stenosis phantom is shown in its cross section (a) and its longitudinal section (c). For better illustration, the stenosis phantom is also shown as an oblique view (b). It can be seen that the stenosis phantom is a cylinder with a length of 70 mm and a diameter of 20 mm. The lumen (not shaded in (c)) consists of three segments: The two outer segments with a length of 24.5 mm and an inner diameter of 10 mm, which was considered the “normal lumen”. The symmetrical central segment with a length of 21 mm with a 3 mm long cone-shaped narrowing at both its endings, which led to the characteristic stenosis, a 15 mm long cylinder with a diameter of 1–9 mm, in this case 5 mm.