Diagnostic Imaging

Question 1

Are X rays shorter or longer in wavelength in comparison to Visible light, radio, and television signals?

Answer 1

Much shorter wavelengths
#11, McCurnin’s (electronic version) 10th ed. Pg 1428

Question 2

What is the term for the negatively charged side of the tube that contains 1-2 filaments housed inside of the focusing cup?

Answer 2

Cathode
#11, McCurnin’s (electronic version) 10th ed. Pg1430

Question 3

What are rotating anodes?

Answer 3

It is a tungsten alloy bonded to molybdenum or graphite which helps dissipate the intense heat produced by a high-powered x-ray machine.
#11, McCurnin’s (electronic version) 10th ed. Pg 1436

Question 4

What is the heel effect?

Answer 4

The uneven distribution of x-ray photons exiting the tube. This is due to the target angle and absorption by the anode material.
#11, McCurnin’s (electronic version) 10th ed. Pg 1436

Question 5

What do kVp setting effect?

Answer 5

The scale of contrast on a radiographic image.
#11, McCurnin’s (electronic version) 10th ed. Pg1447

Question 6

What are the 5 essential components needed to create and x-ray beam?

Answer 6

1 IB

source of electrons, accelerating electrons, obstacle free path for electrons to travel at top speed, target for electrons to interact with, vacuum environment

McCurrin’s 10th edition pg 444

Question 7

What is DICOM?

Answer 7

1 IB

digital imaging and commmunication in medicine - which is a universal digital format that allows images to be shared

McCurrin’s 10th edition pg 457

Question 8

Density vs Contrast

Answer 8

1 IB

density - degree of darkness on the image
contrast - the difference of density between two areas on the image

McCurrin’s 10th edition pg 458

Question 9

How long should a veterinary practice keep film radiographs for?

Answer 9

1 IB

3 years

McCurrin’s 10th edition pg 462

Question 10

Define echogenicity

Answer 10

1 IB

the strength/amplitude of returning echoes

McCurrin’s 10th edition pg 474

Question 11

What is the anode?

Answer 11

The positive side of the tube, and attracts the negative electrons
McCurrin’s 10th edition pg 445
#5

Question 12

What is scatter radiation?

Answer 12

lower energy x-ray photons that have undergone a change in direction after interacting with structures
McCurrin’s 10th edition pg 446
#5

Question 13

What does milliamperage change when taking an x-ray?

Answer 13

-the quality of electrons boiled off the filament in the X-ray tube, affecting the number of X-rays produced. Changing the density of the image.
McCurrin’s 10th edition pg 448
#5

Question 14

When does foreshortening occur?

Answer 14

When a portion of the patient is lifted off the image receptor while another part is in contact with the image receptor, causeing the image to appear shorter
McCurrin’s 10th edition pg 460
#5

Question 15

What is the maximum permissible dose?

Answer 15

0.05 Sv per year
McCurrin’s 10th edition pg 463
#5

Question 16

What is scatter radiation?

Answer 16

Lower energy x-ray photons that have undergone a change of direction after interacting with the patient’s body

McCurnin’s 10th edition pg. 446
#19 JY

Question 17

What is Sante’s rule?

Answer 17

( 2 X thickness of tissue in cm) + distance = kVp

McCurnin’s 10th edition pg 449
#19 JY

Question 18

What does ALARA stand for?

Answer 18

As Low As Reasonably Achievable

McCurnin’s 10th edition pg 464
#19 JY

Question 19

What are the 3 methods of radiation protection?

Answer 19

1. Time
2. Distance
3. Shielding

McCurnin’s 10th edition pg 465
#19 JY

Question 20

What are the four doppler techniques and what are they used for?

Answer 20

1. Color Doppler- illustrates the flow and direction of blood
2. Power Color Doppler- used to track flow but not direction of blood
3. Pulse Wave Doppler- does well for illustrating smaller blood vessels
4. Continuous Wave Doppler- useful in conditions where higher velocity blood flow is more common

McCurnin’s 10th edition pg 473
#19 JY