XT final

if the sid doubles the amount of radiation to the exposure decreases by

75%

occupational dose should no exceed

50 mSv

radiation cataractogenesis follows a

nonlinear threshold

secondary barrier thickness should be

1/32 lead equivalent

leukemia follows a

linear and threshold relationship

radiation exposure is linked to

leukemia, skin cancer and thyroid cancer

72” has an intensity of 60 mAir Kerma what is the intensity at 36”

240

meiosis

divides twice and duplicates once

exposure rate at 72” is 150 mAir Kerma what is the intensity at 40”

456

sodium and potassium are

inorganic compounds

chromosomes are

tiny rod-shaped bodies in the cell nucleus, containing DNA, making up our genes

free radicals

have been observed to produce toxic effects

threshold

assumes there is a radiation dose level reached below which no effects would be observed

at a distance of 42”, exposure value was 98 mAir Kerma what is the exposure value at 84”

0.0245 mAir Kerma

as LET increases RBE

increases

the size of the cell does not

influence radiation biological effects

the xray exposure switch must include

1. technician standing behind a shielded area

2. dead man type

3. switch is permanently fixed to console

radiation induced lung cancer follows a

linear and nonthreshold relationship

cutie pie

is not a personnel monitoring device

brain cells

are least sensitive to the effects of radiation

mAs

is directly proportional to the patient dose

according to the law of Bergonie and Tribondeau radio sensitivity varies

1. directly with the rate of proliferation

2. directly with the level of metabolic rate

3. directly with the rate of mitosis

xrays have the ability to make certain substances

1. undergo biological effects

2. fluroresce

3. produce scatter

in a 60 second cycle alternating current circuit how much time does it take to complete two cycles

1/30 second

if voltage across the primary side of a step up transformer is 120 v and the transformer has a 500:1 ratio what is the voltage on the secondary side

60,000

the purpose of the transformer is to

increase or decrease voltage

potential difference refers

to the flow or strength of the electron flow in the current

what are AEC devices

phototimers and ionization chambers

a film imager is also known as a

film printer

film digitizer

scans an analog film and produces numeric signals based on the appearance of the film

2000 × 2500

will provide the best spatial resolution

indirect conversion

converts xrays to visible light

expsoure indicator number

is an indication of radiation absorbed by the imaging plate

PSP radiography

acquires an image through the use of a phosphor plate

if an image is to grainy

increase mAs

if irradiated tissue increases scatter radiation

increases

shades of gray available for each pixel is defined as

bit depth

radiographic contrast

is the difference in brightness between adjacent portions of the image

a grid should be applied if part thickness is greater than

12cm

a - change in mAs is needed if there is a 2cm increase in part size

30%

libel

written defamation of character

slander

verbal defamation of character

rectal

contains the highest temp readings

sutures on the skull are

fibrous joints

periosteum

fibrous membrane that covers the outside of the long bone

semi axial lordotic

15-20 degrees cephalic

emphysema and pneumothorax

require a decrease in exposure

how many facets make up the subtalar joint

3

how many tarsals bones are in the foot

7

patellofemoral joint

synovial and sellar

Socket portion on the pelvis

Acetabulum

The proximal surface of the tibia is the

Tibial plateau

The left sacroiliac joint is demonstrated in

25 degree RPO

CR for an AP knee

1/2” below the apex of the patella

The condyles of the femur and the tibial - articulate to form the knee joint

Tableau