Ultrasound is an excellent bedside test for the detection of pneumothorax. In the supine patient, it is more sensitive than a CXR and can be performed without delay.
Ultrasound, whether performed by the emergency physician or radiology, should be the initial test of choice in patients with suspected appendicitis. This saves both cost and radiation to the patient and is often diagnostic. CT should be reserved for circumstances where the ultrasound is equivocal.
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