Fig. 2

The application process of the coordinate positioning method. a, b The horizontal orientations. Using the right upper lung lesion as an example, the CT horizontal section (where the lesion is located) is selected, the right chest contour is regarded as the clock face, and the midline of the clavicle is intended to be the 12 o’clock position. The right midline is intended to be the 9 o’clock position, and the lesion in the “Clock Positioning” legend is at the 7.5 o’clock position. c The vertical axis orientation. Using the right upper lung lesion as an example, the axis of the 7.5 o’clock position on the 3D lung model is selected. The length of the lesion to the tip of the lung is recorded as “a”, and the length of the lesion to the interlobular fissure is recorded as “b”. The proportional position of the lesion on this axis is calculated