Ultrasound Acute Chest Syndrome Sickle Cell Disease

Acute chest syndrome (ACS) is a complication of sickle cell disease where individuals have symptoms of fever, low oxygen levels or difficulty breathing in the setting of a new lung finding on chest x-ray. Chest x-ray is a useful tool to identify it but has some side effects. The investigators think ultrasound will be an equally feasible, reliable tool and minimize some of the side effects associated with chest x-ray. Ultrasound is a non-invasive was to obtain an image that does not require radiation.