Overview
Technetium 99m sulfur colloid is a radiolabeled colloid used in nuclear medicine to image liver, spleen and bone marrow distribution and for gastric emptying studies.
Properties
Colloidal particles labeled with Tc 99m emit gamma photons detected by gamma cameras; particle size influences biodistribution.
Uses
Used for liver spleen scintigraphy, sentinel node mapping in some protocols and gastric emptying or gastric mucosa imaging.
Safety
Radiation exposure is low but present; follow nuclear medicine radiation safety, pregnancy screening and local regulatory requirements.