Rcis/rces Xray Radiation Safety

Front 1

1. Lead protection should be at least how many millimeters of lead?

Back 1

0.5 mm

Front 2

2. What is the minimum safe distance to position oneself from the x-ray source?

Back 2

6 ft.

Front 3

3. T/F Collar badges give a good measurement of eye exposure?

Back 3

True

Front 4

4. T/F Collimating reduces skin dose.

Back 4

True

Front 5

***5. T/F Collimating reduces total dose to pt.

Back 5

True

Front 6

**6. T/F Collimating decreases scatter

Back 6

True

Front 7

***7. T/F Collimating improves image quality

Back 7

True

Front 8

8. In an x-ray tube the cathode is (- or +) and the anode is(- or +)?

Back 8

Cathode is negative and the anode is positive

Front 9

9. What does RAD stand for?

Back 9

Radiation Absorbed Dose

Front 10

10. Which end of the tube is positive? Which end is negative?

Back 10

Anode is positive, Cathode is negative.

Front 11

11. T/F An object can be delineated in an image only if the x-ray absorbance is sufficiently different from that of its surrounding structures to produce different exit beam intensity.

Back 11

True

Front 12

12. T/F As x-ray passes through a person there is less available to the deeper tissue.

Back 12

True

Front 13

***13. True or False
Contrast media are liquids that absorb X-rays more effectively than the surrounding tissue.

Back 13

True
Contrast media absorbs X-ray

Front 14

****14. The main source of radiation exposure for the operator is?

Back 14

Scatter

Front 15

15.Doubling the distance between the primary beam and operator, reduces the exposure by a factor of four. True or False

Back 15

True, this is the inverse square law

Front 16

16. The annual dose limit for whole body exposure is____rem/year.

Back 16

5 rem/year or 5 rem (5,000 mrem) each year

Front 17

17. ***TRUE OR FALSE
An LAO cranial view provides 3-6 times more exposure to the operator than an RAO caudal projection

Back 17

*****TRUE

Front 18

18. True or false
Radiation exposure is cumulative. No washout phenomenon occurs.

Back 18

True

Front 19

19. Which image delivers a higher amount of energy (or more X-ray exposure) to the pt and staff Fluoro Imaging or Cine?

Back 19

Cine delivers 5 times more X-ray exposure

Front 20

20. What converts the x-rays to light rays?

Back 20

Image intensifier

Front 21

21. What is the max dose of radiation a worker can receive in a year?

Back 21

5 REM

Front 22

22. The most important factor in decreasing x-ray exposure to a pt is to?

Back 22

Decrease time and exposure

Front 23

23. Radiolucent means?

Back 23

X-rays are permitted to pass through

Front 24

24. True or False
The further you get away from AP projection, the greater the dose to the pt./staff

Back 24

True

Front 25

25. Which image results in an image with more noise? Fluoro Imaging or Cine Imaging?

Back 25

Fluoro

Front 26

26. T/F Cine acquisition generates a lower dose to pt than fluoro imaging.

Back 26

FALSE, cine 5x's more than fluoro

Front 27

27. What is Isocenter?

Back 27

Objects imaged remain in the center of view minimizing table height and movement

Front 28

28. Which view exposes the operator to the greatest amount of radiation? AP, Lateral, or LAO Cranial?

Back 28

LAO Cranial

Front 29

29. What is dose, (RAD) Radiation Absorbed dose?

Back 29

RAD=Amount of radiation energy the body absorbs

Front 30

30. Radiopaque means?

Back 30

x-rays are not permitted to pass thru

Front 31

31.True or False
The smaller the image field size the sharper the resolution but the higher the radiation dose?

Back 31

True

Front 32

32. Magnified fields are better suited for coronary angiography because of their enhanced resolution. What is the size of a Magnified screen?

Back 32

5- to 7-inch

Front 33

33. Large area examinations (i.e., left ventriculography, aortography, or peripheral angiography), the field diameters of ______?

Back 33

9 to 11 inches

Front 34

34. True or False
The largest amount of scatter radiation is produced where the x-ray beam(from the tube) enters the patient.

Back 34

True

Front 35

35. Inverse Square Law = ______the distance = ____ the dose

Back 35

double the distance = 1/4 the dose

Front 36

36. Which pulsed fluoro setting delivers the least amount of radiation?
10pp/sec, 15pp/sec, 7pp/sec

Back 36

7pp/sec

Front 37

37. One step back from tableside cuts exposure by:

Back 37

factor of 4

Front 38

38. Quality control measures include:

Back 38

- periodic PMs
- prompt calibrations
- post radiation output values
- check aprons, shields, gloves annually

Front 39

39. FDA Regulations for resetting fluoro timer?

Back 39

Timer: audible signal every 5 min of irradiation time until reset

Front 40

40. What does ALARA stand for?

Back 40

As Low As Reasonably Achieveable