Passing a nasogastric tube (NGT) is useful both diagnostically and therapeutically. It has been shown clinically that longitudinal strain rate and wall thickening are diagnostically equivalent. Scintigraphy, plain radiographs, and magnetic resonance imaging may all be useful diagnostically. Most outcome research is carried out using time-limited therapy with diagnostically homogenous groups. Furthermore, no currently available physiological or medical measure is definitive diagnostically. Nevertheless, this pattern remains extremely diagnostically useful and the modifier unnecessarily leads to confusion. It is an abnormal finding, and can be diagnostically relevant when found in blood. This discrepancy is diagnostically useful in case of intoxication of an unknown neuromuscular-blocking drug. It has been used diagnostically as a gastric secretion indicator. The hallmark of sitosterolemia is diagnostically elevated levels of plant sterols in the plasma. Since 2001, iodine-metaiodobenzylguanidine myocardial scintigraphy has been used diagnostically in East Asia and Japan. It is used only diagnostically, as its radiation is penetrating and short-lived. Monitoring of the landfill gas itself can be used diagnostically. Diagnostically, it is often used in combination with chromogranin A. The CDC guidelines are silent on these elements diagnostically.