IN-CLASS PROBLEMS

1. Given $FOV_{read} = 256mm$, $G_{read} = 5\,mT/m$, what is $\Delta t$? Say you want to sample 256 points, how long is it to read out a line of data, $T_S$? What is $T_S/T_{2,WM}$? Do you expect relaxation to have a significant effect on signal in this case?

   
   
   
   
   
   
   
   
   
   
   
   
   
   

2. Given $FOV_{phase} = 256mm$, $\tau_{PE} = 4\,ms$, what is $\Delta G_{PE}$? Based upon your answer for $\Delta G_{PE}$, what specification is going to be very important for your gradient amplifier.

   
   
   
   
   
   
   
   
   
   
   
   
   
   

3. Can you have a rectangular FOV in MRI?

   
   
   
   
   
   
   
   

4. Does the resolution in the read and phase direction have to be the same?

   
   
   
   
   
   
   
   

5. Given problem one what would the readout resolution of the experiment be?

HWS 13.6 13.7 13.10