First Pass Angiography

Question 1

what is first pass study used for?

Answer 1

evaluation of rt and lt ventricle wall and ejection fraction at rest or stress and intracardiac shunt may also quantities

Question 2

Indication of the First Pass Study?

Answer 2

1. determination of rt and lt ventricular EF, ventricular function, and wall motion
2. assessment of diastolic and systolic parameters
3. detection and quantitative of left to right shunt

Question 3

what is the Rp and dose for first pass study?

Answer 3

20-25 mCi
Tc99m-pertechnetate
Tc99m-DTPA

Question 4

Equipment information for first pass?

Answer 4

• LFOV 40cm with electronic magnification to 25cm FOV small field of view 25cm
• collimator: LEHS parallel hole, LEAP parallel hole
• energy window: 20%

Question 5

patient prep for first pass

Answer 5

• can eat or drink if rest
• NPO 4hr if stress
• baseline ECG

Question 6

technique for first pass study?

Answer 6

Resting images only
- patient supine or upright
- bolus inject with a 19 or 20-gauge catheter at the basilic vein of the antecubital fossa or the jugular vein
- acquisition starts immediately after injection
- separation of the ventricle from the atrium with RAO-30 to ANT view
- sequential images 25-50 milliseconds per image in 20-30 seconds

Question 7

what is the matrix for RV function?

Answer 7

preferred 64x64
optional 32x32

Question 8

what is the matrix for LV function and shunt?

Answer 8

preferred 32x32
optional 64x64

Question 9

what views are used for RV function?

Answer 9

RAO 20-30 degree preferred
ANT optional

Question 10

what views are used for LV function and shunt?

Answer 10

ANT standard

Question 11

what is the time/frame for RV/LV function?

Answer 11

25 miliseconds/frame
50 miliseconds/frame

Question 12

what is time/fame for shunt?

Answer 12

50 miliseconds/frame
100 milisecond/frame