An imaging direction, downwards relative to the long axis of the human body.

The common radionuclide used for inflammation scintigraphy is 67Ga-citrate, which accumulates in inflammatory lesions and certain neoplasms. A 67 gallium scan may include scintigrams of the whole body or a specific region, performed after i.v. injection. Additionally, a single photon emission computed tomography (SPECT) can be performed. A pathological process presents itself as activity enrichment.

An infusion is the introduction of a medication, or fluid, directly into a vein by means of gravity flow.

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.

Inherent filtration refers to a permanently implemented filter in the useful beam. Inherent filtration includes the window of the x-ray tube and any permanent enclosure for the tube or source.