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Indications And Usage Thallous Chloride Tl 201 May Be Useful In Myocardial Perfusion Imaging For The Diagnosis And Localization Of Myocardial Infarction. It May Also Have Prognostic Value Regarding Survival, When Used In The Clinically Stable Patient Following The Onset Of Symptoms Of An Acute Myocardial Infarction, To Assess The Site And Size Of The Perfusion Defect. Thallous Chloride Tl 201 May Also Be Useful In Conjunction With Exercise Stress Testing As An Adjunct In The Diagnosis Of Ischemic Heart Disease (Atherosclerotic Coronary Artery Disease) . It Is Usually Not Possible To Differentiate Recent From Old Myocardial Infarction, Or To Differentiate Exactly Between Recent Myocardial Infarction And Ischemia. Thallous Chloride Tl 201 Is Indicated Also For The Localization Of Sites Of Parathyroid Hyperactivity In Patients With Elevated Serum Calcium And Parathyroid Hormone Levels. It May Also Be Useful In Pre-Operative Screening To Localize Extrathyroidal And Mediastinal Sites Of Parathyroid Hyperactivity And For Post-Surgical Reexamination. Thallous Chloride Tl 201 Has Not Been Adequately Demonstrated To Be Effective For The Localization Of Normal Parathyroid Glands.
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