Cross-sectional chest

Thoracic cross-sectional segment of trunk

Structure of thoracic cross-sectional segment of trunk

This cross-sectional segment is bounded superiorly by a virtual horizontal plane at the level of the thoracic inlet (upper boundary of first thoracic (T1) vertebra) and inferiorly by a virtual horizontal plane at the level of the lower boundary of the twelfth thoracic (T12) vertebra. The segment therefore includes the entire thoracic cavity but also part of the upper abdominal volume above the virtual plane at the T12 vertebra. The volume includes the entire transverse thickness of the body over the longitudinal extent between the superior (upper) and inferior (lower) boundaries including the skin and subcutaneous tissue. The segment relates to the cross-sectional or projectional volume as perceived by transmissive or emissive imaging.

Cross-sectional thorax