It is 3 am and you are about to see a 38 year old female patient brought in by paramedics with complaints of dyspnoea. Her vital signs are bit concerning; she is tachypnoeic with a respiratory rate of 30 and her O2 sats are 90 % in room air. As you begin talking to her, she says she wants to go home. You convince her to get a chest x-ray and she reluctantly agrees. Here is the PA chest x-ray. What can you see ?