Scatter Radiation and Its Control

Question 1

Three types of interactions when radiation is absorbed by matter:

Answer 1

Coherent,Compton,Photoelectric effect

Question 2

Interactions termed Scatter Radiation or simple scatter:

Answer 2

Coherent and Comption Effect

Question 3

Interaction referred to as Secondary Radiation:

Answer 3

Photoelectric Effect

Question 4

Coherent Scattering is also referred to as:

Answer 4

Thompson Scatter

Question 5

Travels in all directions:

Answer 5

Compton Effect

Question 6

X-Ray photon interacts with the outer orbital electron of an atom,removing it from from the atom(Ionization),and then proceeds in a different direction:

Answer 6

Compton Effect

Question 7

Incoming photon from the primary bean collides with the inner orbital electron of an atom:

Answer 7

Photoelectric Effect

Question 8

Scatter Radiation creates fog that reduces both contrast and:

Answer 8

Visibility of the spatial resolution

Question 9

Four Primary factors directly affect the quantity of scatter radiation fog on the radiograph:

Answer 9

Volume of tissue,kilovoltage,density of the matter and field size

Question 10

The thicker or larger the body part is:

Answer 10

The greater are the scatter and the fog

Question 11

The denser the body part:

Answer 11

The lesser the scatter

Question 12

The patient is the ______ source of scatter radiation

Answer 12

Primary

Question 13

As collimation is increased ,or made larger :

Answer 13

Scatter radiation fog increases

Question 14

The principle method for reducing scatter radiation fog is to use a:

Answer 14

Radiographic Grid

Question 15

Is the relationship between the height of the lead strips and the width of the spaces between them:

Answer 15

Grid ratio

Question 16

The number of lead strips per inch is called:

Answer 16

The Grid Frequency

Question 17

Grids for general-purpose use are called ____ because the lead strips are aligned in the direction of the diverging primary X-Ray beam:

Answer 17

Focused Grids

Question 18

The lead strips of a focused grid are precisely aligned with the X-Ray beam at a specific source-image receptor distance (SID),which is called a:

Answer 18

Grid Radius

Question 19

The grid absorbs some useful radiation,the radiographic image includes an image of the grid itself.This is called:

Answer 19

Grid Lines or Grid Striping

Question 20

A moving grid is called a:

Answer 20

Bucky

Question 21

Is a special cassette with a grid built into the front side:

Answer 21

Grid Cassette

Question 22

Excessive absorption of useful radiation by the grid is called:

Answer 22

Grid Cutoff

Question 23

A grid with strips that are parallel to eachother ,rather than focused,is called a:

Answer 23

Parallel Grid

Question 24

A composite of two grids with the lead strips at right angles to each other:

Answer 24

Crosshatch Grid or Crossed Grid