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Computerized tomography (CT) scan. In patients who are not pregnant, a CT scan (a type of X-ray study) of the area of the appendix is useful in diagnosing appendicitis and peri-appendiceal abscesses as well as in excluding other diseases inside the abdomen and pelvis that can mimic appendicitis.
What Is Spirometry for COPD? A spirometry test is a type of pulmonary function test (PFT) that helps doctors diagnose the presence and severity of COPD. For many COPD patients, spirometry is one of the most misunderstood concepts of the disease.