ARRT Radiography Exam Review (300-
400)Questions And Answers
Elongation (body part appears longer than normal) is caused by angulation along the
________ axis of the part being imaged. - Answer Long
Foreshortening (body part appears shorter than normal) is caused by angulation
against the ________ axis of the part being imaged. - Answer Main
Grids are constructed of ________ strips separated by ________ interspacers. -
Answer 1) Lead
2) Aluminum
The height of the lead strips divided by the distance between the lead strips is known
as: - Answer Grid Ratio
Grid Ratio Formula: - Answer H/D
The number of lead strips in a grid per inch (or centimeter) is known as: - Answer
Grid Frequency
The measure of the ability of a grid to increase contrast is the ________. - Answer
Contrast Improvement Factor
The ratio of primary radiation transmitted through the grid to secondary radiation
transmitted through the grid is the ________. - Answer Grid Selectivity
Grid conversion factor (GCF) is the amount of exposure ________ necessary to
compensate for the ________ of image-forming x-rays and scatter in the cleanup
process. - Answer 1) Increase
2) Absorption
Grid conversion factor is also known as: - Answer Bucky Factor Value
How do you calculate the new mAs required for a specific grid using the grid
conversion factor? - Answer GCF of selected grid times the current mAs
What is the grid conversion factor for a 5:1 grid? - Answer 2
What is the grid conversion factor for a 8:1 grid? - Answer 4
What is the grid conversion factor for a 12:1 grid? - Answer 5
What is the grid conversion factor for a 16:1 grid? - Answer 6
When normal density appears in the middle of a radiograph with decreased density
on the sides, this is likely a result of: - Answer Grid Upside Down
When image-forming x-rays are absorbed all across the radiographic field, with cutoff
(decreased density) visible over the entire radiograph, this is a result of: - Answer
Grid Off-Level
, ARRT Radiography Exam Review (300-
400)Questions And Answers
When the central ray does not strike the grid in the center, and there is visible cutoff
more to one side of the radiograph than the other, the cause is: - Answer Lateral
Decentering
When there is normal density in the middle of the radiograph, with cutoff visible on
the sides, the cause is likely to be: - Answer Grid-Focus Decentering
________ is the distance at which focused grids may be used. - Answer Grid Focus
Focus range is ________ for low-ratio grids. - Answer Wide
Focus range is ________ for high-ratio grids. - Answer Narrow
Generally, grids are used when the body part being imaged is ________ cm thick or
greater, or when more than ________ kVp is used. - Answer 1) 10
2) 60
What type of build is massive, represents 5% of the population, has a broad and
deep thorax, high diaphragm, high colon, and a stomach and gallbladder that are
high and horizontal? - Answer Hypersthenic
What body type is a slight modification of hypersthenic, is the most common body
habitus, and is present in 50% of the population? - Answer Sthenic
What body type is between asthenic and sthenic and is present in 35% of the
population? - Answer Hyposthenic
What body type is a slender build, is present in 10% of the population, has a narrow
and shallow thorax, long thoracic cavity, long lungs, low diaphragm, short abdominal
cavity, low colon, and a stomach and gallbladder that are low, vertical, and near the
midline? - Answer Asthenic
A process is a: - Answer Prominence
A spine is a: - Answer Sharp prominence.
A tubercle is a: - Answer Rounded projection.
A tuberosity is a: - Answer Large rounded projection.
A trochanter is a: - Answer Very large body prominence.
A crest is a: - Answer Ridge
A condyle is a: - Answer Round process of an articulating bone.
A head is a: - Answer Enlargement at the end of a bone.
400)Questions And Answers
Elongation (body part appears longer than normal) is caused by angulation along the
________ axis of the part being imaged. - Answer Long
Foreshortening (body part appears shorter than normal) is caused by angulation
against the ________ axis of the part being imaged. - Answer Main
Grids are constructed of ________ strips separated by ________ interspacers. -
Answer 1) Lead
2) Aluminum
The height of the lead strips divided by the distance between the lead strips is known
as: - Answer Grid Ratio
Grid Ratio Formula: - Answer H/D
The number of lead strips in a grid per inch (or centimeter) is known as: - Answer
Grid Frequency
The measure of the ability of a grid to increase contrast is the ________. - Answer
Contrast Improvement Factor
The ratio of primary radiation transmitted through the grid to secondary radiation
transmitted through the grid is the ________. - Answer Grid Selectivity
Grid conversion factor (GCF) is the amount of exposure ________ necessary to
compensate for the ________ of image-forming x-rays and scatter in the cleanup
process. - Answer 1) Increase
2) Absorption
Grid conversion factor is also known as: - Answer Bucky Factor Value
How do you calculate the new mAs required for a specific grid using the grid
conversion factor? - Answer GCF of selected grid times the current mAs
What is the grid conversion factor for a 5:1 grid? - Answer 2
What is the grid conversion factor for a 8:1 grid? - Answer 4
What is the grid conversion factor for a 12:1 grid? - Answer 5
What is the grid conversion factor for a 16:1 grid? - Answer 6
When normal density appears in the middle of a radiograph with decreased density
on the sides, this is likely a result of: - Answer Grid Upside Down
When image-forming x-rays are absorbed all across the radiographic field, with cutoff
(decreased density) visible over the entire radiograph, this is a result of: - Answer
Grid Off-Level
, ARRT Radiography Exam Review (300-
400)Questions And Answers
When the central ray does not strike the grid in the center, and there is visible cutoff
more to one side of the radiograph than the other, the cause is: - Answer Lateral
Decentering
When there is normal density in the middle of the radiograph, with cutoff visible on
the sides, the cause is likely to be: - Answer Grid-Focus Decentering
________ is the distance at which focused grids may be used. - Answer Grid Focus
Focus range is ________ for low-ratio grids. - Answer Wide
Focus range is ________ for high-ratio grids. - Answer Narrow
Generally, grids are used when the body part being imaged is ________ cm thick or
greater, or when more than ________ kVp is used. - Answer 1) 10
2) 60
What type of build is massive, represents 5% of the population, has a broad and
deep thorax, high diaphragm, high colon, and a stomach and gallbladder that are
high and horizontal? - Answer Hypersthenic
What body type is a slight modification of hypersthenic, is the most common body
habitus, and is present in 50% of the population? - Answer Sthenic
What body type is between asthenic and sthenic and is present in 35% of the
population? - Answer Hyposthenic
What body type is a slender build, is present in 10% of the population, has a narrow
and shallow thorax, long thoracic cavity, long lungs, low diaphragm, short abdominal
cavity, low colon, and a stomach and gallbladder that are low, vertical, and near the
midline? - Answer Asthenic
A process is a: - Answer Prominence
A spine is a: - Answer Sharp prominence.
A tubercle is a: - Answer Rounded projection.
A tuberosity is a: - Answer Large rounded projection.
A trochanter is a: - Answer Very large body prominence.
A crest is a: - Answer Ridge
A condyle is a: - Answer Round process of an articulating bone.
A head is a: - Answer Enlargement at the end of a bone.
