Myocardial Perfusion Imaging 99mTc

Question 1

what is indication for Tc99m Tetrofosmin and sestamibi?

Answer 1

1. detection of CAD
2. emergency evaluation of chest pain
3. Risk stratification for CAD
4. detection of hibernating myocardium in conjunction with tl201 and F18-fdg

Question 2

patient prep for Tc99m

Answer 2

1. discontinue all cardioactive medication
2. beta-blocker for 24hr
3. calcium channel blocker
4. caffeine for 12hr
5. ECG
6. NPO 4-6 hr

Question 3

what is the dose of Tc99m tetrofosmin and sestamibi?

Answer 3

8-12 for 1st inject
24-36 for 2nd inject

Question 4

identify the procedure of Tc99m

Answer 4

• supine, left arm up
• image 30-45 min after injection
• allow 2hr between studies

Question 5

dose for 2day Tc99m protocol?

Answer 5

8-36 mCi each day either stress or rest done first

Question 6

what is Bull-eye plot/polar maps?

Answer 6

• provide a quick, comprehensive overview of the circumferential sample from all slices by combining them into a color coded image. the points of each circumferential profile are assigned a color based on normalized count value and the cored profiles are shaped into concentric rings