Table 1. Visualisation and mean maximum size of the thoracic duct in each section.

	Visualisation			Mean maximum size
Section	Complete	Partial	Minimal	LD	TD
Upper	14%	42%	44%	2.8 mm	2.3 mm
Middle	52%	28%	20%	2.5 mm	2.1 mm
Lower	72%	14%	14%	2.7 mm	2.4 mm

LD, longitudinal diameter; TD, transverse diameter.

Visualisation of the thoracic duct was evaluated in 50 patients with regard to each section. The mean maximum size was evaluated in 38 patients with upper section, 43 patients with middle section and 44 patients with lower section who showed “complete” or “partial” visualisation at each section.