Radiography

Question 1

What portion of the electromagnetic spectrum is used in medical practice?

Answer 1

Iodizing radiation

Question 2

X-rays occur when a projectile _____ interacts with the K-shell of an electron and removes it from its orbit

Answer 2

Electron

Question 3

The x-ray tube contains a negative _____ and a positive _____

Answer 3

cathode, anode

Question 4

When the foot pedal or exposure button is pressed, the negative electrons are rapidly attracted to the positive anode. Electrons are then converted into 99% _____ and 1% x-ray

Answer 4

Heat

Question 5

The quantity of x-rays that reach the film is the _____ setting

Answer 5

mAs

Question 6

The penetration power of the x-ray beams is the ______ setting

Answer 6

kVp

Question 7

What is the MPD in mrem and rem?

Answer 7

5,000 mrem and 5 rem

Question 8

Where do you measure for Abdominal x-rays?

Answer 8

caudal aspect of 13th rib

Question 9

Where do you measure for thoracic x-rays? Which view is commonly done alongside lateral for best view of the heart?

Answer 9

Caudal border of scapula. DV is best for heart, VD for lungs

Question 10

Barium and Iodine are examples of ____ media contrast

Answer 10

positive

Question 11

Which positive media contrast is best if a GI perforation is suspected?

Answer 11

Iodine. Barium will cause granulomatous reactions if leaked into the abdominal cavity

Question 12

After giving Barium, at what time intervals should x-rays be taken during an upper GI Barium study?

Answer 12

Immediately, 15 mins, 30 mins, 60 mins, hourly until study is complete

Question 13

What happens to frequency as wavelength of x-ray increases?

a) increases
b) decreases
c) does not change
d) not a factor when describing x-rays

Answer 13

B

Question 14

Which best describes ionizing electromagnetic radiation?

a) it is characterized by the energy contained in a photon
b) it occurs only in nature and is not human-made
c) it does not damage tissues
d) it has a wavelength much longer than that of visible light

Answer 14

A

Question 15

What are not properties of x-rays?

a) they can penetrate living tissue
b) they can cause some substances to fluoresce
c) they form a homogenous beam that travels in wavy lines
d) they are electrically neutral and dont have a mass

Answer 15

C: x-rays form a heterogenous beam

Question 16

In the diagnostic range, most x-rays are:

a) bremsstrahlung radiation
b) Braking radiation
c) characteristic radiation
d) A and B

Answer 16

D

Question 17

Which of the following controls the contrast on the image?

a) mAs
b) kV
c) SID
d) RAD

Answer 17

B: kV (kilovoltage)

Question 18

Exposure factors for a thorax are 10 mAs and 60 kV. The film density is too light, and the technician wants to double the density. What technique should be used for the radiograph?

a) 200 mA, 0.1sec, 60 kV
b) 150 mA, 0.1 sec, 60 kV
c) 100 mA, 0.2 sec, 69 kV
d) 300 mA, 0.3 sec, 69 kV

Answer 18

A: when film density is too light and exposure time is the suspect, doubling density from 10 to 20 means a change to 200 mA per 0.1 second

Question 19

To minimize magnification and penumbra, a technician should ____ the sourceimage distance and ____ the source object distance

a) increase, decrease
b) increase, increase
c) decrease, increase
d) decrease, decrease

Answer 19

A

Question 20

The heel effect is going to be less noticeable with:

a) larger film and shorter SID
b) larger film and longer SID
c) smaller film and shorter SID
d) smaller film and longer SID

Answer 20

D