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Patient as beam emitter & Pathology Flashcards | StudBud
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Patient as beam emitter & Pathology
Patient as beam emitter & Pathology
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StudBud Administration
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Interactions within the human body, effective atomic number, image quality and pathology
Flashcards
26 cards
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Practice quiz
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Questions
26
Answers
1
X-rays have the ability to eject electrons from atoms w/in human tissue
True
False
2
Which of the following describes misrepresentation of size or shape of an area?
subject distortion
subject detail
subject density
subject contrast
3
If the peak kVp is 110, the average keV energy of the beam would be
33-44 keV
110 keV
66-77 keV
12-24 keV
4
Which of the following are by-product of PE interaction?
electron only
electron and scatter photon
scattered photon only
There is no by-product
5
Fill in the missing letters PN_U_O_ONI_S_S
E C M N O I
E M C N O I
E C M O N I
6
Which condition might result in decreased thickness, Z# or density?
Cirrhosis
Sclerosis
Pneumothorax
Cardiomegaly
7
What type of change to technical factors would occur with this condition?
Increase in mAs
Increase in SID
Increase in kVp
No change is necessary
8
The x-ray interaction responsible for absorption is _____.
compton
photoelectric
bremsstrahlung
characteristic
9
60 kVp will result in ____ and ____
lower energy, less proportional attenuation
higher energy, less proportional attenuation
lower energy, greater proportional attenuation
higher energy, greater proportional attenuation
10
A higher kVp setting will result in ____ and _____
more photoelectric & less compton interactions
more compton & less photoelectric interactions.
less coherent & more photoelectric interactions
more coherent & less photoelectric interactions
11
What technical factor adjustment would be appropriate for someone with empyema?
Increase in kVp
Increase in mAs
Decrease in kVp
Decrease in mAs
12
The part of the beam that exits the tube is called:
The exit beam
The primary beam
The remnant beam
13
Attenuation of the x-ray beam is defined as:
reduction in x-ray beam energy after passing thru matter
reduction in x-ray beam quality after passing thru matter
reduction in x-ray beam intensity after passing thru matter
14
What substance has an atomic number of 8?
Carbon
Oxygen
Hydrogen
Nitrogen
15
The part of the beam that exits the patient
No beam exits the patient
The exit beam
The primary beam
The diagnostic beam
16
What is the frequency of x-rays?
104
10-18
10-4
1018
17
What is determined by the amount & type of irradiated material?
absorber
density
attenuation
atomic number
18
What is the greatest image quality variable?
mAs
kVp
SID
Patient
19
Which of the following are by-products of coherent interaction?
electron and scattered photon
scattered photon only
electron only
There is no by-product
20
What substance has an effective atomic number of 6.46?
Fat
Water
Muscle
Air
21
Which of the following processes occur during x-ray beam interaction w/tissue?
heat
transmission
absorption
scattering
22
A kVp of 110 will result in ____ and ____.
higher energy, less proportional attenuation
lower energy, less proportional attenuation
higher energy, greater proportional attenuation
lower energy, less proportional attenuation
23
Which condition can result in new bone growth?
Gout
Osteomalacia
Acromegaly
Osteoporosis
24
Which exam might exhibit high subject contrast?
Decubitus Abdomen
AP abdomen
AP Chest
25
Name this pathological condition
Pulmonary edema
Tuberculosis
Cardiomegaly
Pneumothorax
26
Which of the material has the lowest tissue density?
Fat
Muscle
Bone
Water
