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WorksheetsRadiology Review
Total questions: 49
Worksheet time: 30mins
What happens to the wavelength as the frequency of an x-ray decreases?
It lengthens.
It shortens.
It does not change.
It is not a factor when describing x-rays.
Which best describes ionizing electromagnetic radiation?
It is characterized by the energy contained in a photon.
It occurs only in nature and is not human made.
It does not damage tissues.
It has a wavelength much longer than that of visible light.
What is a property of x-rays?
They can be produced in a range of energies.
They can cause fluorescence of bone.
They form a homogeneous beam that travels in wavy lines.
They are electrically neutral and have mass.
Which of the following controls the contrast on the radiograph?
mAs
kV
SID
RAD
Exposure factors for a thorax are 10 mAs and 60 kV. The film density is too light (organs are visible), and the technician wants to double the density. What is the best technique that should be used for the second radiograph?
200 mA, 0.10 second, 60 kV
150 mA, 0.10 second, 60 kV
100 mA, 0.20 second, 69 kV
300 mA, 0.30 second, 69 kV
The cathode on a x-ray tube
is positively charged.
contains the filament.
contains the focal spot.
can be rotating or stationary.
A radiograph of a dog's pelvis measures 12 cm in diameter. The technician manually processed the film for the required time and temperature, but the radiograph is too light. What is the most likely reason for this?
A grid was used and not compensated for.
The SID was less than 40 cm.
Fast-speed screens were accidentally used instead of medium-speed screens.
Chemicals were stirred.
Which best describes rare earth phosphors used today in intensifying screens?
Emit primarily in the blue-green light part of the spectrum
Provide minimal x-ray-to-light conversion
Require increased exposure factors but produce finer density
Emit primarily in the yellow or green part of the spectrum
What safety tenets need to be kept in mind when taking radiographs?
Maximum time, minimum distance, and maximum shielding
Maximum time, maximum distance, and maximum shielding
Minimum time, maximum distance, and maximum shielding
Minimum time, maximum distance, and minimum shielding
______ is a process whereby some of the x-ray beam will be absorbed as well as pass through the anatomic part.
Transmission
Differential absorption
Beam Attenuation
Scatter
What is the primary function of the anode in an x-ray tube?
To emit electrons
To focus the x-ray beam
To convert electron energy into x-rays
To control the exposure time
Which factor primarily affects the sharpness of a radiographic image?
kV
mAs
Focal spot size
Film speed
What is the effect of increasing the source-to-image distance (SID) on image magnification?
Increases magnification
Decreases magnification
No effect on magnification
Increases image contrast
What is the primary purpose of using a grid in radiography?
To increase image contrast by absorbing scattered radiation
To decrease the exposure time required
To enhance the sharpness of the image
To reduce the size of the x-ray beam
Which factor is most responsible for controlling the density of a radiograph?
kV
mAs
SID
Focal spot size
What is the effect of increasing the kV on the penetration power of x-rays?
Decreases penetration power
Increases penetration power
No effect on penetration power
Increases image contrast
What is the effect of increasing the mAs on the density of a radiographic image?
Decreases image density
Increases image density
No effect on image density
Increases image contrast
Which component of the x-ray tube is responsible for focusing the electron beam?
Anode
Cathode
Focusing cup
Filament
What happens to the contrast of a radiographic image when the kV is decreased?
Contrast increases
Contrast decreases
No effect on contrast
Contrast becomes inverted
The dosimeter measures:
sound waves.
endoscope waves.
radiation exposure.
ultrasonic exposure.
Radiopaque may indicate the presence of hard tissue by appearing:
black to dark gray in color.
white to light gray in color.
red to orange in color.
green to blue in color.
Secondary radiation that occurs when the beam intercepts an object
Kvp
MAS
Radiation
Scatter radiation
What type of radiation causes film fog?
Primary Beam
Scatter Radiation
Too high kVp
Too low mAs
The scientist that discovered x-rays
Roentgen
Einstein
Curie
Tesla
In the production of x-rays, what is the percentage of heat produced?
100%
1%
5%
99%
What is a particle of energy when referring to radiation?
Photon
Proton
Electron
Current
Which of the following are true in regards to X-rays?
Invisible and electrically charged
Invisible and cause biological damage to living tissue
Invisible and focused through a lens
Visible and travel in a straight line
What would you expect to see if your kVp setting was too high?
Too dark/Overpenetrated
Too Light/Overpenetrated
Too dark/Underexposed
Too Light/Underexposed
PPE protects you from which radiation?
Primary Beam
Scatter Radiation
Heat Bloom
A personal dosimeter should be assigned to one individual:
If that person works in two locations, can be worn at both
Should be worn at the wrist
May be stored in the x-ray room close to patients
Must only be worn in one location and stored at that site
What is the filament in the cathode made of?
Thoriated tungsten
Molybdenum
Copper
Tungsten Alginate
Every health care worker who assists with an x-ray procedure
may be given the leaded apron and gloves
must be provided with appropriate and correct protection
must be given instructions in writing to ensure compliance
may not need protection if he or she is within 10 feet of the source
The care of leaded aprons should include
laying the aprons on a flat surface
folding the aprons when not in use
hanging them by the shoulders with no folds or creases
cleaning the surfaces with strong solvents
The inverse square law
discusses the relationship between intensity of radiation from the source and distance of the object from the source
is practical only with visible light
is useful only with high energy photons
concerns the use of binding energy calculation
Remnant radiation is the
radiation that exits the patient
particulate radiation absorbed by the filter
radiation that does not pass through the body
radiation that is absorbed by the grid
Grid Ratio is described as
The height of the lead strips compared with their density
The height of the lead strips compared with their width
The height of the lead strips compared with the distance between them
The height of the lead strips compared with their thickness
Filtration of the x-ray beam
reduces effect of milliamperage
reduces dose to patient
enhances the pair production effect
determines the final contrast of the image
The correct use of the Anode Heel Effect
Positioning the thickest part toward the anode
Positioning the thickest part toward the cathode
Positioning animal on its right side with the heels closest to the central ray
Using a grid to prevent scatter radiation
If you have a pacemaker or metal in the body, which imaging technique might be a contraindication?
x-ray
CT scan
MRI
PET scan
Moving or live x-ray.
fluoroscopy
MRI
CT scan
echocardiogram
Ultrasound of the heart.
echocardiogram
mammogram
CT scan
endoscopy
The area of the TFT that is capable of recording information in comparison to the portion of the TFT that houses electronics is referred to as:
Pixel pitch
Fill factor
DQE
none of the above
What is the photoconductor material typically used in the direct conversion of digital radiography?
a-Se
CsI
a-Si
NaCl
What does a scintillator do?
Absorbs light and converts energy to x-rays
Absorbs light and converts to light
Absorbs x-rays and converts energy to light
Absorbs x-rays and converts to carbon
What does DR stand for?
Digitized Radiology
Digital Radiography
Digital Resonance
Disgustingly Repulsive
Hyperechoic tissues have which of the following characteristics in an ultrasonic study?
Reflect few echoes that result in low-level grays on the screen
Reflect many echoes that result in brighter white areas on the screen
Reflect few to no echoes that result in black areas on the screen
Reflect few echoes that result in bright white areas of the screen
What is the correct definition of the abbreviation B-mode in ultrasound?
Bits
Blood
Bananas
Brightness
Which of the following frequencies will allow the deepest penetration in ultrasound?
3 Mhz
5 Mhz
9MHz
12 MHz
What element is found within the transducer of an ultrasound machine?
phosphor crystals
magnets
tungsten
piezoelectric ceramic crystals
