Test Bank For Merrill's Atlas of Radiographic Positioning and
Procedures, 15th - 2024 All Chapters questions and answers
The CR can be angeled through the part of interest under the following conditions: -
Overlying or underlying structures must not be superimposed
A curved structure must not the superimposed on itself
When a projection through an angled joint is necessary
When projections through angled structures must be obtained without foreshortening or
elongation
The general goal is to place the CR at _______ angles to the structure of interest. - right
What does the SID effect? - Patient dose
Magnification
Spatial resolution
SSD - source-to-skin distance
SSD affects - patient dose
Reasons for collimation - Minimizes amount of scatter
Minimizes patient dose
Reduces the potential for reduction in contrast resolution
Scatter only occurs when - When the x-ray beam interacts with matter
T/F: It's ok to not collimate just because you don't feel like it. - FALSE it is a violation of
the Code of Ethics to collimate larger than the required field size.
Why would you use a lower kVp? - Old age
Pneumothorax
Emphysema
Emaciation
Degenerative arthritis
Atrophy
Why would you use a higher kVp? - Pneumonia
Pleural effusion
Hydrocephalus
Enlarged heart
Edema
,Ascites
Short scale is a low or high contrast? - High contrast
High contrast results from high or low kVp? - Low kVp
Long scale is a low or a high contrast? - Low contrast
Low contrast results from low or high kVp? - High kVp
Long scale, low contrast, and a high kVp result in more or less shades of gray? - More
shades of gray
Short scale, high contrast, and low kVp result in more or less shades of gray? - Less
shades of gray
Computed radiography means that the image is produced in _______ format using
computer technology. - Digital
Digital radiography is similar to CR, except for that the IRs are ________ - built into the
x-ray table or wall unit.
Attention to ______ is key in quality digital imaging. - detail
A slightly _______ kVp produces a better image than a slightly ______ kVp. - higher ;
lower
The SSD shall not be less than ___in and should not be less than ___in. - 12 ; 15
Why is it important to not use a too low kVp? - The x-ray beams will be unable to
penetrate the body part adequately and can create poor image quality, therefore leading
to unnecessary patient exposure.
Why should you use a higher kVp? - A higher kVp reduces the mAs, therefore reducing
the exposure time and limiting the patient's radiation exposure.
Which technical factor gives the x-rays energy? - kVp
Which technical factor affects the amount of x-rays? - mAs (due to its control over the
exposure time)
What does the AEC control? - Automatic exposure control, limits the amount of x-rays
because it stops the exposure once it reaches the set mAs and kVp
How is a patients thickness measured? - A caliper
, What does a grid do? - It helps "clean up" the scatter
How thick does a body part have to be to require a grid? - 10cm or greater
At what kVp should a grid be used? - 90 kVp or greater
T/F: The radiographer doesn't have to watch the patient during an exposure. - FALSE
What are the 3 primary technical factors? - mA
kVp
exposure time (s)
What is the minimum amount of staff should assist in lifting and transferring a patient? -
4
What is obesity? - An increase in body weight caused by an excessive accumulation of
fat.
What BMI is considered obese? - 30.0-39.9
What BMI is considered morbidly obese? - greater than 40
_______________ is key in all imaging procedures. - Communication
How many personnel are required for transferring an obese patient? - 8-10 people
typically
Obese patients are not manually lifted, they are moved by _________ - sliding
What is the most reliable landmark on obese patients? - Jugular notch
Ethics - Term applied to a health professional's moral responsibility and the science of
appropriate conduct toward others
ASRT - American Society of Radiologic Technologists
Who developed the CURRENT code of ethics? - ASRT
IR - Receives the energy of the x-ray beam and forms the image of the boy part
Name the 5 IR's involved in diagnostic radiology - -Cassette with film
-Image plage
-Solid-state detectors
-Portable digital radiography
-Fluoroscopic screen
Procedures, 15th - 2024 All Chapters questions and answers
The CR can be angeled through the part of interest under the following conditions: -
Overlying or underlying structures must not be superimposed
A curved structure must not the superimposed on itself
When a projection through an angled joint is necessary
When projections through angled structures must be obtained without foreshortening or
elongation
The general goal is to place the CR at _______ angles to the structure of interest. - right
What does the SID effect? - Patient dose
Magnification
Spatial resolution
SSD - source-to-skin distance
SSD affects - patient dose
Reasons for collimation - Minimizes amount of scatter
Minimizes patient dose
Reduces the potential for reduction in contrast resolution
Scatter only occurs when - When the x-ray beam interacts with matter
T/F: It's ok to not collimate just because you don't feel like it. - FALSE it is a violation of
the Code of Ethics to collimate larger than the required field size.
Why would you use a lower kVp? - Old age
Pneumothorax
Emphysema
Emaciation
Degenerative arthritis
Atrophy
Why would you use a higher kVp? - Pneumonia
Pleural effusion
Hydrocephalus
Enlarged heart
Edema
,Ascites
Short scale is a low or high contrast? - High contrast
High contrast results from high or low kVp? - Low kVp
Long scale is a low or a high contrast? - Low contrast
Low contrast results from low or high kVp? - High kVp
Long scale, low contrast, and a high kVp result in more or less shades of gray? - More
shades of gray
Short scale, high contrast, and low kVp result in more or less shades of gray? - Less
shades of gray
Computed radiography means that the image is produced in _______ format using
computer technology. - Digital
Digital radiography is similar to CR, except for that the IRs are ________ - built into the
x-ray table or wall unit.
Attention to ______ is key in quality digital imaging. - detail
A slightly _______ kVp produces a better image than a slightly ______ kVp. - higher ;
lower
The SSD shall not be less than ___in and should not be less than ___in. - 12 ; 15
Why is it important to not use a too low kVp? - The x-ray beams will be unable to
penetrate the body part adequately and can create poor image quality, therefore leading
to unnecessary patient exposure.
Why should you use a higher kVp? - A higher kVp reduces the mAs, therefore reducing
the exposure time and limiting the patient's radiation exposure.
Which technical factor gives the x-rays energy? - kVp
Which technical factor affects the amount of x-rays? - mAs (due to its control over the
exposure time)
What does the AEC control? - Automatic exposure control, limits the amount of x-rays
because it stops the exposure once it reaches the set mAs and kVp
How is a patients thickness measured? - A caliper
, What does a grid do? - It helps "clean up" the scatter
How thick does a body part have to be to require a grid? - 10cm or greater
At what kVp should a grid be used? - 90 kVp or greater
T/F: The radiographer doesn't have to watch the patient during an exposure. - FALSE
What are the 3 primary technical factors? - mA
kVp
exposure time (s)
What is the minimum amount of staff should assist in lifting and transferring a patient? -
4
What is obesity? - An increase in body weight caused by an excessive accumulation of
fat.
What BMI is considered obese? - 30.0-39.9
What BMI is considered morbidly obese? - greater than 40
_______________ is key in all imaging procedures. - Communication
How many personnel are required for transferring an obese patient? - 8-10 people
typically
Obese patients are not manually lifted, they are moved by _________ - sliding
What is the most reliable landmark on obese patients? - Jugular notch
Ethics - Term applied to a health professional's moral responsibility and the science of
appropriate conduct toward others
ASRT - American Society of Radiologic Technologists
Who developed the CURRENT code of ethics? - ASRT
IR - Receives the energy of the x-ray beam and forms the image of the boy part
Name the 5 IR's involved in diagnostic radiology - -Cassette with film
-Image plage
-Solid-state detectors
-Portable digital radiography
-Fluoroscopic screen
