NCIt definition : The chloride salt form of thallium-201, a cyclotron produced isotope use in diagnostic
imaging. Thallous chloride TI-201 accumulates in myocardial cells and other tissues
in an analogous way as potassium, and can be evaluated as a function of blood flow.
By scintigraphic means, areas with decreased blood flow, consisting of ischemic cells,
can be visualized due to decreased uptake of TI-201 in contrast to areas with normal
blood flow.;