Your abdomen and chest may be x-rayed to confirm whether your symptoms are caused by acute pancreatitis or by other disorders that can cause similar symptoms. In addition, the following tests may be done to detect changes in the size of your pancreas:
ultrasound exam
endoscopic retrograde cholangiopancreatography (ERCP), an exam in which the doctor inserts an endoscope, an instrument with a light, into your throat and guides it through your stomach and into your small intestine
CT (computed tomography) scan.