X-Rays

Question 1

Discovery of X-Rays

Answer 1

Wilhelmina Roentogen 1895

Question 2

Properties of x-rays

Answer 2

1) diverge in space from the source
2) differential absorption
3) no refraction
4) biological effects

Question 3

Advanced imaging

Answer 3

1) computer tomography

2) magnetic resonance imaging

Question 4

Image formation

Answer 4

1) X-ray tube
2) X-ray beam
3) object
4) film
5) image

Question 5

X-ray beam

Answer 5

1) cone shaped from a point source

2) central ray is most central portion: truest image

Question 6

Radiolucent

Answer 6

Least tissue density

Most blackness on film

Question 7

Radiopaque

Answer 7

Most tissue density

Whiteness on film

Question 8

Body position

Answer 8

1) upright
2) recumbent
3) oblique
4) decubitus

Question 9

Magnification equation

Answer 9

Object size = (image size) x (correction factor)

Question 10

Correction factor equation

Answer 10

Correction factor = (total distance - distance to the object) / total distance

Question 11

Collimation

Answer 11

1) blocking peripheral positions of the beam to limit the area exposed
2) achieves better detail

Question 12

Epiphysis

Answer 12

1) Articular end of the bone

2) separated from the rest of the bone by the physis (growth plate)

Question 13

Metaphysis

Answer 13

1) tapering portion between the physis and the shaft

2) site of growth and greatest metabolic activity

Question 14

Diaphysis

Answer 14

1) the shaft of bone

2) medullary cavity filled with red marrow