| Question |
Answer |
| What is the best way(s) to reduce the amount of scatter reaching the film? |
By restricting the x-ray beam and by using a grid. |
| What 2 factors affect the amount of scatter radiation produced? |
kVp and irradiated material (patient thickness) |
| Name the 4 types of beam restrictors. |
Aperture diaphragm, cones, cylinders, and collimators (ACCC) |
| What is another name for automatic collimators? |
Positive beam limitation devices (PBL) |
| X-ray beam and light should coincide within ___ of SID. |
2% |
| The principal factors that affect the amount of scatter produced are? |
Kilovotage and the irradiated material |
| As kilovotage increase, the percentage of x-rays that undergo a Compton interaction __________ and the percentage of photons that undergo photoelectric absorption _________. |
Increases, decreases |
| The total number of photons that undergo interaction __________ with increased kVp. |
Decreases |
| When the beam is restricted, _______ scatter radiation will reach the IR, and as a result, technical factors may need to be ________. |
Less, increased |
| Cones and cylinders are most commonly employed in radiography of the ________, _______, ___________, and ____________. |
Skull, spine, gallbladder, breast |
| _________ _________ ____________ devices are automatic collimators that use sensing devices to activate collimator shutters into proper position. |
Positive beam limitation |
| Higher atomic number materials attenuate a ________ percentage of the beam than low atomic number materials. |
Greater |
| __________ is the quantity of matter per unit of volume measured in kilograms per cubic meter. |
Density |
| ________ __________ is the degree of differential absorption resulting from the differing absorption characteristics of the tissues in the body. |
Subject contrast |
BIOL3326 Forms
