What those it means if you go xray and they said...

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What does dark spots means on chest X-ray ?
dark spots could different things such as :
- inflammation
- infection
- foreign body
- fluid 
- blood 
What factor effect the diagnosis of dark spots on X-ray ?
1. symptoms 
2. location of the spot 
3. size of the spot 
4. assisting tests 
What are the test that may be needed :
1. blood gases 
2. blood test 
3. lung function
4. lung discharge culture 
What to do next ?
- show your doctor you X-ray and discuss your current your medical condition 
- usually , an acute infection may appear as a dark wide area around one part of lung such as upper lobes , which is usually treated by medication as well
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