Fig. 2

In vitro volumetry. a Photo of round-shaped phantom. Scale = 1 cm. b Exemplary 2DE, c 3DE, d and magnetic resonance images of phantoms with and without exemplary tracings and 3D reconstructions. e Bland-Altman analysis of 2DE and f 3DE volumes compared to gold standard magnetic resonance imaging (MRI) assessed phantom volumes. n = 6