13 results
Millicurie limit guidelines for major and minor radioactive spills.
I-131 - 1mCi
In-111 - 10 mCi
F-18 - 10
major and minor radioactive ... Label "caution radioactive ... limits #guidelines #radioactive
Differentiation of Causes of Hyperthyroidism According to Pattern of Radionucleotide Uptake
Reduced uptake:
 • Thyroiditis
 • Exogenous
adenoma #rai #radioactive
Laboratory Evaluation of Patients for Thyroid Disease 
Hyperthyroidism:
 • Graves disease - TSH low; free T4
normal or increased radioactive ... normal or increased radioactive ... increased; decreased radioactive ... normal; decreased radioactive
Thyroid Disorders - Differential Diagnosis Algorithm
Hypothyroidism:
 • Hasimoto’s
 • Radioactive Iodine 
 • Hypopituitarism
 • Iodine
Hasimoto’s • Radioactive
Approach to the Diagnosis of Hyperthyroidism - Differential Diagnosis and Workup Algorithm

 • Secondary Hyperthyroidism (↑↔TSH,
T3/Free T4) Radioactive ... Multinodular goiter Radioactive
Graves' Disease Treatment
Thionamides (mainly methimazole)
 • Chance of remission in up to 2 years
 • No
40%) • Low cost Radioactive
Hyperthyroidism (low TSH, High T4/T3) - Diagnostic Algorithm

Radioactive iodine scan – get if concern for nodular
Diagnostic Algorithm Radioactive
Graves Disease - Autoimmune Hyperthyroidism
Epidemiology: Most common cause of hyperthyroidism, Incidence peaks at 30-50
Diagnosis: 
1 )
(take time) • Radioactive
Hyperthyroidism Overview

Clinical Manifestation of Hyperthyroidism:
 • Fatigue
 • Weight loss
 • Heat intolerance
 • Depression, nervousness
scintigraphy with radioactive ... Methimazole and PTU) • Radioactive
Approach to Thyroid Function Tests in the Evaluation of Hyperthyroidism
 • Low TSH, Low normal T4
with TRAb → Radioactive