X ray grids and care

Grid removes scattered radiation

• True

• False

Ratio between the height of the Lead strips and the distance between them

• Grid ratio

• bucky factor

• Primary transmission

Ratio of the incident radiation on the grid to the transmitted radiation passing through the grid

• grid ratio

• bucky factor

• primary transmission

Ratio of the contrast with a grid to the contrast without a grid is called bucky factor

• True

• False

Which one of the following is not true about grid cut off

• poor geometric relationship between the primary beam and the Lead foil strips of the grid

• primary radiation reaches the film

• high ratio grids

• the images of the Lead strips are projected wider than they would be with ordinary magnification .

Radiation leakage is mainly due to

• Cracking of the tube housing

• Improper shielding

• both A and B

Which one of the following is not true about faults glass envelope?

• prevents of secondary electrons

• reduced speed of electrons impinging on the target

• Production couldn’t be controlled independently

• both b and c

Difference in thermal expansion of metal on the surface & metal immediately beneath the surface damages anode

• True

• false

The chart which determines the maximum heat capacity of the anode

• anode heating chart

• radiographic rating chart

• housing heating chart