Traditional Culture Encyclopedia - Photography major - What is the photographic distance between the lung and the heart?

What is the photographic distance between the lung and the heart?

The differences are as follows:

The exposure time of heart projection is higher than that of lung projection in kilovolts, milliamperes and shorter, thus clearly showing the edge and shape of the heart.

The center line of the heart projection is horizontally aligned with the sixth thoracic vertebra. The lung projection is aimed at the fourth thoracic vertebra plane.