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Gated Radionuclide Angiography (RNA) Quiz

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Gated Radionuclide Angiography (RNA) Quiz

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Questions and Answers

What is the primary purpose of gated radionuclide angiography (RNA)?

To evaluate liver function

To measure left ventricular ejection fraction and evaluate left ventricular regional wall motion (correct)

To visualize coronary arteries

To diagnose cardiac valve diseases

What is required to label the blood for RNA?

123I-labeled serum proteins

18F-labeled platelets

99mTc-labeled red blood cells (correct)

99mTc-labeled white blood cells

How many frames are typically used in a gated acquisition?

24-30 frames

32-40 frames

8-10 frames

16-20 frames (correct)

What resets the gate during a gated acquisition?

The R-wave Signup and view all the answers

How long does the scanning process typically take?

1 hour Signup and view all the answers

How is the pediatric dose of 99mTc-Iabeled red blood cells adjusted?

According to the patient's weight Signup and view all the answers

What is the principle of thallium-201 myocardial perfusion study?

To diagnose coronary artery disease with high sensitivity and specificity Signup and view all the answers

What is the approximate percentage of the injected dose of 201-TI that is taken up by the myocardium at rest?

1-2% Signup and view all the answers

What is the purpose of a first-pass flow study with 99mTc sestamibi?

To evaluate heart function and ejection fraction Signup and view all the answers

Why is 99mTc sestamibi used in place of 201-TI in obese patients?

So that a higher dose may be administered for clearer imaging results Signup and view all the answers

What is the minimum dose recommended for pediatric patients for a 201-TI study?

300 mCi (11.1 MBq) Signup and view all the answers

What is the adult dose for a stress study with 201-TI?

3 mCi (111 MBq) Signup and view all the answers