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DEXA > Test 6: Exam Edge > Flashcards

Test 6: Exam Edge Flashcards

(75 cards)

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1
Q

When a bony densitometry is performed, accuracy is important at what stage:

A

Establishing the baseline

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2
Q

T or F: The auditory ossicles are the smallest bones in the human body.

A

True

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3
Q

The central dual-energy x-ray absorptiometry has what type of scanners or beams?

A

Pencil beam

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4
Q

The axial skeleton is composed of how many bones?

A

80

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5
Q

Osteoporosis is increased in people who have what? (Low calcium intake, eating disorders, gastrointestinal surgery)

A

All of the above

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6
Q

What region of the vertebral column is associated with the lower back?

A

Lumbar

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7
Q

The sternum is what shape?

A

Knife shaped

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8
Q

What type of osteoporosis can occur at any age?

A

Secondary osteoporosis

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9
Q

The human skeleton contains how many bones?

A

206

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10
Q

The head is found in what main bone division of the body?

A

Axial skeleton

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11
Q

The skull is composed of how many bones?

A

22

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12
Q

T or F: Distance is a method for ALARA.

A

TRUE

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13
Q

Manufactures of bone densitometry equipment have different bone mineral density values. A conversion from BMD values sBMD values were created to:

A

Convert the manufacture’s BMD to a standard BMD

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14
Q

Osteoporosis commonly affects what? (Wrist, Spine, Hip)

A

All of the above

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15
Q

The bone remodeling cycle is initiated by what?

A

Osteocytes

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16
Q

T or F: The axial skeleton of the body is comprised of the ribs.

A

True

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17
Q

What is crucial for treatment of osteoporosis?

A

Early detection

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18
Q

What form of oxygen is placed in pressurized metal cylinders?

A

Compressed gas form

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19
Q

What type of bones support the mouth?

A

Facial bones

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20
Q

What area of the femur has the lowest amount of bone mineral density?

A

The Ward’s Triangle

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21
Q

What type of marrow stores fat?

A

Yellow marrow

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22
Q

Biochemical markers detects what?

A

Bone resorption

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23
Q

Some types of fan beam DXA systems have a rotating:

A

C-arm

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24
Q

Osteoclasts secrete what?

A

Enzymes

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25
A x-ray tech wants to create an educational website on radiology topics. What should the tech keep in mind regarding patient confidentially when developing content on the internet?
A website is NOT HIPPA compliant
26
What doe the “p” in pDEXA stand for?
Peripheral
27
What type of calibration are changes in tissue depth compensated for, by changing filtration of the x-ray beam on a point-by-point basis?
Fixed
28
What is known as the original DXA system?
Pencil beam
29
The Hologic QDR 4500A is what type of densitometer?
Fan beam x-ray bone densitometer
30
DXA does what?
Examines bone health
31
Luc-Al phantoms are made of what? (Aluminum, Polymethyl methacrylate, Clear acrylic)
All of the above
32
T or F: DXA scans are a painless procedure.
True
33
A DPA uses how much radiation?
Low doses
34
The fan beam DXA uses what?
X-rays
35
A DXA scan is recommended for individuals with what conditions?
Dementia
36
BMD can be used to calculate what?
T-scores & Z-scores
37
A K-edge filter is also known as what?
Compound filter
38
How are K-edge filters laid out?
In layers
39
A DXA scanner creates how many x-ray beams?
2
40
What type of calibration category includes two approaches?
Fixed
41
What is not a major principle that is used to help maintain radiation doses?
Outside environment
42
What does ALARA stand for?
As Low As Reasonably Achievable
43
A Z-score -0.39 is related to what percentile?
35th percentile
44
The lumbar vertebra arch has how many laminae?
2
45
What is the curve called that occurs in the lower spine?
Lordosis
46
A T-score of -3 means what?
Osteoporosis
47
A DXA scan of the lumbar spine uses what?
Low energy x-rays
48
The spinal cord ends where?
T12-L1
49
What is known as a non-functional muscle group that governs the lumbar spine?
Mutators
50
The machine used for a DXA scan of the lumbar spine does what?
Emits x-rays from 2 sources through the lumbar spine
51
The segment being examined is L5-S1. What is segment called?
Lumbosacral joint
52
What does BMD stand for?
Bone Mineral Density
53
What type of DXA device is used for lumbar spine scans?
Central DEXA devices
54
What is the equation used to find the T-score?
(BMD-Reference BMD)/Standard deviation
55
Of the following body structures, which is considered adjacent to the lumbar spine? (Jaw, Ribs, Ankle, Brain)
Ribs
56
The lumbar vertebrae are considered what?
The largest unfused vertebrae found in the spinal column
57
Which of the following is considered the distal site of the forearm? (55%, 33%, 25%, 10%)
10%
58
For patient’s with PHPT, the wrist T-score is found with DXA scan in what part of the body?
Forearm
59
How is the ulna typically measured?
From the styloid to the olecranon process
60
The radius connects to all of the following muscles, EXCEPT: (Deltoid, Extendor primi internode pollicis, Supinator, Extensor)
Deltoid
61
The ulna is characterized as being what?
Long
62
Kyphosis can be caused by which of the following? (Birth defects, Scheuermann’s disease, Disk degeneration)
All of the above
63
There are how many ulna bones in the human body?
2
64
he forearm is composed of how many bones?
2
65
An ultradistal ROI is subject to what?
Bone edge detection problems
66
DXA scans of the forearm have what for patients?
Low radiation exposure
67
What is used to secure the forearm during a scan?
Straps or tape
68
The head of the femur is located where?
Proximal end
69
What layer of the femur is characterized by being very sensitive?
Periosteum
70
A patient is known to have scoliosis, which leg should be scanned?
Convexity side
71
The femur is characterized by being what?
Long & slender
72
What scan would be recommended if the patient couldn’t have a DXA of the hip area for any reason?
Forearm
73
An image of the scan shows a lesser trochanter that is very large. What is the likely cause?
Under rotation
74
T or F: Lack of precision in scans can cause inaccurate reporting in Rate of Change of BMD.
True
75
The femur is also known as what?
Thigh bone

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