SCAN TIME FORMULAS

Question 1

What is the formula for a spin echo sequence?

Answer 1

TR X PHASE MATRIX X NEX /1000

Question 2

What is the formula for a fast spin echo sequence?

Answer 2

TR X PHASE MATRIX X NEX / ETL/1000

Question 3

What is the formula for a 3D Gradient echo pulse sequence?

Answer 3

TR X PHASE MATRIX X NEX X # OF SLICES /1000

Question 4

Pixel size formula:

Answer 4

FOV/matrix

Question 5

Pixel size dimensions (phase and frequency):

Answer 5

FOV/phase matrix and FOV/frequency matrix

Question 6

Pixel area:

Answer 6

Multiply phase pixel size by frequency pixel size

Question 7

Cardiac:

Answer 7

60,000 / heart rate