a grid is usually employed in wich of the following circumstances:
1- when radiographing a large or dense body part
2- when using high kilovoltge
3- when a lower patient dose is required
a- 1 only
b- 3 only
c- 1 and 2 only
d- 1,2 and 3
1- when radiographing a large or dense body part
2- when using high kilovoltge
3- when a lower patient dose is required
a- 1 only
b- 3 only
c- 1 and 2 only
d- 1,2 and 3