Air does not absorb xray beams, so areas filled with air, such as the bronchial tree, appear black in a CRX. Although the lungs appear somewhat black, there are a lot of white "streaks" within them. These streaks represent structures within the lungs, such as branches of the bronchial tree and pulmonary vessels. Notice that in a normal chest film, the right hemidiaphragm is slightly higher than the left hemidiaphragm.
2. right lung
3. left lung
What do you think this is?Answer