A<unk> , called a<unk>  X-ray <unk> , or<unk>  film, is a projection<unk>  of the<unk>  used to diagnose conditions affecting the<unk> , its contents, and nearby structures.<unk> s are the most common film taken in medicine. Like all methods of<unk> y,<unk> y employs ionizing radiation in the form of X-rays to generate images of the<unk> . The mean radiation dose to an adult from a<unk>  is around 0.02 mSv (2 mrem) for a front view (PA, or posteroanterior) and 0.08 mSv (8 mrem) for a side view (LL, or latero-lateral). Together, this corresponds to a background radiation equivalent time of about 10 days.
Chest radiograph
Post bronchodilator test
Thoracoscopy
Bronchoscopy
CT pulmonary angiogram
Sputum culture
Lung biopsy
Bronchography