A mismatch describes an activity loss in lung perfusion scintigraphy combined with normal ventilation scintigraphy, e.g. in case of pulmonary embolism.

Inhalation scintigraphy is a type of lung imaging with radioactive aerosols. Inhalation scintigraphy can be accomplished with 99mTc-DTPA or other aerosols. The patient inhales the particles over a special system.

See also Pulmonary Scintigraphy, Aerosol Ventilation Scintigraphy and Gas Ventilation Scintigraphy.