merge 2

Question 1

EXTREMITY (FOREARM) RECOMMENDED DOSE
LIMIT

Answer 1

-500mSv/yr (50rem/yr)

Question 2

• X-ray
• Gamma-ray
• Alpha particle- Highest LET; Highest weighting factor (20)

Answer 2

RADIATION WEIGHTING FACTOR (Wr)

Question 3

• accounts for the
  relative radiosensitivity of various tissues and organs
• Tissues with higher BLANK value = more radiosensitivity

Answer 3

TISSUE WEIGHTING FACTOR (Wt)

Question 4

most sensitive tissue

Answer 4

• gonads - 0.20
• bone marrow - 0.12

Question 5

least sensitive tissue

Answer 5

• skin - 0.01
• bone surface - 0.01

Question 6

lead-lined metal container into which the x-ray tube is fitted

Answer 6

PROTECTIVE TUBE HOUSING

Question 7

Indicates exposure and when the x-ray tube is energized with the
use of mA and kVp indicators

Answer 7

CONTROL PANEL

Question 8

Restriction of the useful beam to reduce patient dose and improve image contrast

Answer 8

COLLIMATION

Question 9

reduction in radiation intensity results from absorption and scattering

Answer 9

Attenuation

Question 10

feature of radiographic collimators that automatically adjusts the radiation field to the size of the image receptor

Answer 10

POSITIVE BEAM LIMITATION (PBL)

Question 11

• A mechanism to ensure proper alignment of the X-ray beam
  and image receptor
• Addition to proper collimation
• The Light field, x-ray beam, and the image receptor must be
  aligned

Answer 11

BEAMA LIGNMENT

Question 12

TOTALFILTRATION
OF-at least

Answer 12

2.5mmAl

Question 13

Radiographic tubes operated b/n 50-70kVp

Answer 13

15mm Al filtration

Question 14

XRAY TUBES FOR MAMMOGRAPHY

Answer 14

FILTRATION OF 30µm Mo (Molybdenum) or 60µm Rh
(Rhodium)

Question 15

The output radiation intensity should be constant from one exposure to another for any given technique

Answer 15

REPRODUCIBILITY

Question 16

The ability of a radiographic unit to produce constant radiation output for various combinations of mA and exposure time (s)

Answer 16

LINEARITY

Question 17

SSD means

Answer 17

source-to-skin distance

Question 18

ESD means

Answer 18

entrance skin dose

Question 19

dose that exits the patient

Answer 19

EXIT EXPOSURE DOSE

Question 20

SSD must not be less than 38cm

Answer 20

STATIONARY FLUOROSCOPES

Question 21

SSD not less than 30cm

Answer 21

MOBILE FLUOROSCOPES

Question 22

fluoroscopic exposure switch; exposure is
terminated when released the pedal

Answer 22

DEAD-MAN TYPE

Question 23

Produces audible signal/sound when the fluoroscopic time exceeded 5minutes

Answer 23

CUMULATIVE TIMER