Rad Science Quiz 1 Flashcards
1
Q
A grid with high/low grid ratio and high/low selectivity is more efficient at absorbing scatter.
A
high
high
2
Q
The distance from the grid to the convergence line is the
A
focal distance
3
Q
K=
A
contrast w/grid
contrast w/out grid
4
Q
grids with low selectivity will absorb more _ and less _
A
primary beam
scatter
5
Q
The GCF for an 8:1 grid is
A
x4
6
Q
Grid strips are made of _ and the interspace material is made of
A
lead
aluminum
7
Q
what is grid frequency?
A
of grid lines per inch or cm
8
Q
As lead content in a grid increases patient dose increases/decreases.
A
increase
9
Q
As grid ratio decreases radiographic density increases/decreases
A
increases
10
Q
100 mA@.2s@70kV@40’@5;1 grid= _mA@.1s@60kV@40”@TT
A
20mA?
