This is a CT scan of the upper chest showing a mass in the right lung (seen on the left side of the picture).

This CT scan shows a cross section of the lungs of a person with lung cancer. The two dark areas in the middle of the screen are the lungs. The light areas in the left lung represent the cancer.

This is a CT scan of the upper lungs. This individual has a mass in upper part of the right lung (left side of picture).

This chest CT scan shows a cross-section of a person with bronchial cancer. The two dark areas are the lungs. The light areas within the lungs represent the cancer.