radiology 1

tungest filament is located in the anode

a. true
b. false

any body part exceeding this measurement requires the use of a grid to reduce scatter.

A. 2.5cm
B. 20cm
C. 10cm
D. 30cm

the focal spot originates from the:

A. beryllium window
B. focusing cup
C. tungsten target
D. tungsten filament

a low out output xray machine utilizes a stationary anode

a. true
b. false

during the developing process metallic silver is converted to silver halide crystals

a. true
b. false

radiographic ___ is the degree of blackness on a finished radiograph

a. density
b. contrast

a ___ scale of contrast generally produces a more diagnostic radiograph

a. long
b. short

the ___is most responsible for the quanity of xray produced and radiographic density, vs ___ is most responsible for the quality of the xray beam and the radiographic scale of contrast

a. kVp;mAs
b. mAs;kVp

the higher the grid ratio the moe effective the grid is at absorbing scatter

a. true
b. false

elctrons travel:

A. toward the anode in the xray tube
B. toward the cathode in the xray tube
C. away from the anode in the xray tube
D. none of the above

all of the following are types of somatic damage caused by radiation except

A. cataracts
B. gene mutation
C. sterility
D. all of the above

what is the maximum permissible dose of radiation that a person can receive according to state and federal regulation

A. 0.05 sv/year
B. 100 rem/year
C. 0.005 sv/year
D. 0.5 sv/year

if the cassette is not directly under the primary beam, how will the film look like?

A. the exposed portion will be distorted
B. the exposed image will lookas if two identical objects are exposed
C. the part of the film not under the primary beam is balck or unexposed
D. the part of the film not directly under the primary beam is white or unexposed

the temperature of the filament is controlled by:

A. kVp setting
B. mA setting
C. time setting
D. source image distance

an underexposed film appears___; to correct this___

A. too dark; increase kvp or ma
B. too light; increase kvp or ma
C. too dark; decrease kvp or ma
D. too light; decrease kvp or ma

how does kvp affect scatter radiation?

A. kvp has no effect on scatter radiation
B. as kvp increase, scatter radiatin decreases
C. as kvp decreases, scatter radiation can increase
D. as kvp increase, scatter radiation can increase

you hae determined that the penetration is inadequate for a particular abdominal film and the film has an overall white apperance. what should you do next?

A. increase mas by 30-50%
B. increase kvp by 30-50%
C. increase kvp by 10-15%
D. increase mas by 10-15%

all of the following are necessary for xray production except

A. an obstacle free path for the electrons to travel
B. a method of accelerating the electrons
C. a vaccum enviroment so the xray dont collide with anything
D. all of the above

which of the following ways to decrease your exposure to radiation

A. look away from the primary beam when exposing the radiograph
B. wear your personal protective equipment
C. stand upright, dont lean over the table
D. all of the above

all of the following could cause a radiograph to be too dark except

A. too much time in the developer
B. xray tube failure
C. over measurement of the part under examination
D. too much kvp

the most common cause for a radiograph turning yellow is the devloper not being completely washed off before going into the fixer

a. true
b. false

used to measure the thickness of the area to be xrayed

list the five subject densities from lowest density to highest density

is a non image forming radiation that moves in all directions and results from xrays bouncing off the objects

is disortion of anatomic structures so that the image appears longer than actual size due to the xray beam not being directed perpendicular to the film

is distortion of anatomic structures so that the image appears longer than the actual size due to the xray beam not being directed perpendicular to the film surface

is distortion of anatomic structures when the image appears larger than normal

the ___ refers to a decrease of xray intensity on the anode side of the xray beam caused by the anode target angle

are devices used to monitor our exposure to radiation

refers to the distance between the source of xray and the image receptors or film

the cathode has a ___ charge
the anoe has a ___ charge