Test 1 Ch 1-3

Question 1

What controls Density?

Answer 1

mAs
# of X-rays
The amount of blackness on the image

25-30% to see difference

Question 2

What controls Contrast ?

Answer 2

KvP

Can be described at long or short scale !!

KvP controls penetrating power

15% increase to see change

Low contrast (long scale) for chest

Question 3

What is a grid used for ?

Answer 3

To absorb scatter

Question 4

Wedge filter is used for what ?

Answer 4

To even out thickness/anatomy densities

Question 5

What is a trough filter used for ?

Answer 5

Used for chest imaging

Question 6

What is a boomerang filter used for?

Answer 6

Placed behind patient for shoulder or upper thoracic spine radiographs

Question 7

What is the anode heel effect ?

Answer 7

Greater attenuation or absorption in thicker portion of the body part.
Cathode for thicker body part, anode on less thickness portion

Question 8

What is penumbra

Answer 8

Unshared edges of objects

Question 9

X-rays originate from ?

Or the source of X-rays come from ?

Answer 9

Th focal spot

Question 10

Effective/equivalent dose measures in what unit ?

Answer 10

Sievert

Question 11

Exposure unit is measured in what unit ?

Answer 11

R) roentgen or C/kg

Question 12

Absorbed dose is measured in what unit ?

Answer 12

Gy or Rad

Question 13

The annual dose limit for occupational workers?

Answer 13

50 mSv (5000mrem)

Question 14

Annual dose for general public

Answer 14

1 mSv (100mrem)

Question 15

What’s the purpose of filtration ?

Answer 15

To absorb low energy X-rays

Copper or aluminum is used

Question 16

How much lead thickness is need for shielding

Answer 16

1 mm lead

Question 17

Trendelenburg position

Answer 17

Head below the feet

Question 18

Which of the 2 pixel sizes is most critical in maintaining high resolution ?

Answer 18

Display matrix

Question 19

Amphisrthrodial

Syntharthrodial

Diaryhrodial

Answer 19

Slightly movemable

Immovable

Freely moveable

Question 20

Some times called the romance of the abdomen?

Answer 20

Pancreas

Question 21

The pear shape sac

Answer 21

Gallbladder

Question 22

Presence of gallstones in the gallbladder

Answer 22

Cholelithiasis

Question 23

General abdominal haziness on a radiograph could be what ?

Is also fluid build up in abdominal cavity

Answer 23

Ascites

Question 24

Distended air filled loops of the small bowel

Answer 24

Ileus

Question 25

A chronic disease involving inflammation or the large intestine

Answer 25

Ulcerative colitis

Question 26

Actelescoping disease of a section of the vowel into another loop

Answer 26

Intussception Coiled spring appearance

Question 27

Structure that connects the small intestine to the posterior abdominal wall?

Answer 27

Mesentery

Question 28

Stores and releases bile

Answer 28

Gallbladder

Question 29

The double walled membrane lining of the abdominal cavity

Answer 29

Peritoneum

Question 30

Which position would be best for a patient with a history of Ascites ?

Answer 30

Supine KUB

Question 31

Which position demonstrates possible aneurysms and calcifications of the aorta ?

Answer 31

Dorsal decubitus

Question 32

3 projections for the acute abdominal series

Answer 32

AP supine AP erect OR lateral decubitus PA chest

Question 33

The twisting of a loop intestine that causes an obstruction

Answer 33

Volvulus

Question 34

The potential space between the double walled membrane

Answer 34

The pleural cavity

Question 35

MechanicL obstruction or foreign objects swallowed

Answer 35

Aspiration (common in kids)

Question 36

Bronchiectasis

Answer 36

An irreversible dilation or widening of bronchi from repeated pulmonary infection

Question 37

Difficulty emptying the airway in the lungs Irreversible and chronic lung disease which air spaces in alveoli become very enlarged

Answer 37

COPD Emphysema