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dexa 2

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dexa 2
John Appleseed9305
Test por John Appleseed9305, actualizado hace más de 1 año
John Appleseed9305
Creado por John Appleseed9305 hace más de 8 años
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Resumen del Recurso

Pregunta 1

Pregunta
According to WHO, for the diagnosis of osteoporosis, based on the measurement of bone density is:
Respuesta
  • 2.5 SDs or more below the young adult peak bone density and a fracture
  • 2.5 SDs or more below the young adult peak bone density
  • More than 1 SD but less than 2.5 SDs below the young adult peak bone density
  • Not more than 1 SD below the young adult peak bone density

Pregunta 2

Pregunta
What is the most common technique that is used to measure BMD?
Respuesta
  • QUS
  • QCT
  • SXA
  • DXA

Pregunta 3

Pregunta
What is the most common osteoporotic fracture?
Respuesta
  • Hip
  • Shoulder
  • Spine
  • Wrist

Pregunta 4

Pregunta
In bone densitometry, what is the primary responsibility of the technologist?
Respuesta
  • beam collimation
  • distance
  • shielding
  • time

Pregunta 5

Pregunta
Which of the following is considered an uncontrollable risk factor for osteoporosis?
Respuesta
  • exercise
  • lifestyle choices
  • smoking
  • race

Pregunta 6

Pregunta
Which of the following measures more trabecular bone?
Respuesta
  • PA spine
  • Lateral spine
  • QCT spine
  • VFA

Pregunta 7

Pregunta
Primary osteoporosis Type 1, is related to
Respuesta
  • aging
  • disease
  • medication
  • menopause

Pregunta 8

Pregunta
Identify the incorrect statement from the following:
Respuesta
  • Caucasian and Asians are at an increase risk of developing osteoporosis compared to other ethnic groups
  • most obese patients are at an increase risk of developing osteoporosis
  • women are at an increase risk of developing osteoporosis compared to men because they achieve a lower peak bone mass and go through menopause
  • smoking is a recognized risk factor for the development of osteoporosis

Pregunta 9

Pregunta
Cancellous bone is also known as :
Respuesta
  • compact bone
  • cortical bone
  • trabecular bone
  • osteophyte

Pregunta 10

Pregunta
New bone matrix is formed by:
Respuesta
  • osteoblasts
  • osteoclasts
  • cortical bone
  • cancellous bone

Pregunta 11

Pregunta
What percentage of trabecular bone is found in the PA spine?
Respuesta
  • 1%
  • 33%
  • 50%
  • 66%

Pregunta 12

Pregunta
Currently, the most accurate method to determine a patient’s response to therapy form osteoporosis is:
Respuesta
  • serial DXA measurements of the forearm
  • serial DXA measurements of the hip and spine
  • serial QUS measurements of the calcareous
  • Serial QCT measurements of the spine

Pregunta 13

Pregunta
Which of the following does not help in achieving peak bone mass?
Respuesta
  • normal puberty
  • exercise
  • corticosteroid therapy
  • adequate calcium and vitamin D intake

Pregunta 14

Pregunta
Which of the following statement is false concerning QUS advantages over x-ray base methodologies for BMD measurements?
Respuesta
  • QUS units are comparatively inexpensive
  • the patients heel must be immersed in liquid during the procedure
  • patients are not subjected to ionizing radiation
  • ultrasound examinations are quick to perform

Pregunta 15

Pregunta
which of following site is mostly composed of cortical bone
Respuesta
  • distal forearm
  • femoral neck
  • proximal forearm
  • vertebral bodies

Pregunta 16

Pregunta
What is the anatomical landmark on the proximal femur that indicates the best visual indication of the degree of rotation of the proximal femur?
Respuesta
  • femoral head
  • femoral shaft
  • greater trochanter
  • lesser trochanter

Pregunta 17

Pregunta
Which lumbar vertebra is described as having a characteristic shape of an X or H on a DXA PA spine scan?
Respuesta
  • L1
  • L2
  • L3
  • L4

Pregunta 18

Pregunta
What is the name of the radionuclitide used in DPA?
Respuesta
  • Americium- 241
  • Gadolinium-153
  • Iodine‘-125
  • Technetium-99

Pregunta 19

Pregunta
The forearm is not used to monitor the effects of therapy for osteoporosis because
Respuesta
  • accuracy is poor
  • precision is poor
  • there is no effect
  • the rate of change in BMD is to slow

Pregunta 20

Pregunta
Which of the following is not a bisphosphonate?
Respuesta
  • alendronate
  • etodronate
  • foiteo
  • zoledronic acid

Pregunta 21

Pregunta
The primary mechanism of action of anti-resorptive therapies is the result of direct interaction with:
Respuesta
  • the bone lining cells
  • the osteoblasts
  • the osteoclasts
  • the osteocytes

Pregunta 22

Pregunta
The WHO criteria for diagnosing osteoporosis was initially defined to apply to
Respuesta
  • all women
  • all Caucasian women
  • only postmenopausal women
  • only Caucasian postmenopausal women

Pregunta 23

Pregunta
The measurement of peripheral BMD is advocated for
Respuesta
  • all individuals regardless of age
  • pediatrics
  • screening
  • males

Pregunta 24

Pregunta
The PA spine mostly measures the:
Respuesta
  • posterior elements
  • vertebral bodies
  • transverse processes
  • pedicle

Pregunta 25

Pregunta
Which of the following statement about QCT measurements of bone density of the spine is not True?
Respuesta
  • the measurements are volumetric rather than areal measurements of bone density
  • accuracy may be affected by marrow fat
  • results are usually reported in g/cm squared
  • trabecular bone can be isolated from cortical bone

Pregunta 26

Pregunta
ln order to do a compare analysis:
Respuesta
  • the patient must have a previous scan done on the same mode/speed
  • you must retrieve the baseline scan(s)
  • patient positioning must be consistent
  • all of the above

Pregunta 27

Pregunta
How many degrees should you rotate the femur when positioning for a proximal femur scan?
Respuesta
  • 10 -15 degrees
  • 15-25 degrees
  • 20-25 degrees
  • 25-30 degrees

Pregunta 28

Pregunta
When should Z-scores be used to make a diagnosis, instead of T-scores?
Respuesta
  • females 65 and older
  • males 65 and older
  • postmenopausal females
  • males or females under age 20

Pregunta 29

Pregunta
Which of the following bone parameters is measured in grams?
Respuesta
  • area
  • bone mineral content
  • bone mineral density
  • total

Pregunta 30

Pregunta
Which lumbar vertebra has the widest transverse process?
Respuesta
  • L1
  • L2
  • L3
  • L4

Pregunta 31

Pregunta
The region of the proximal femur lying on the border of the femoral neck is termed:
Respuesta
  • lesser trochanter
  • femoral head
  • hip axis length
  • ward's area

Pregunta 32

Pregunta
What is important for serial monitoring?
Respuesta
  • accuracy
  • precision

Pregunta 33

Pregunta
If the daily QC fails, (in the United States) what should be your first step of action?
Respuesta
  • repeat the scan
  • call the manufacturer
  • get yourself another cup of coffee
  • go home!

Pregunta 34

Pregunta
With changes in rotation of the femoral neck what happens?
Respuesta
  • decrease in the BMC
  • decrease in the BMD
  • increase in the BMD
  • increase ROI

Pregunta 35

Pregunta
Which of the following would best describe low bone mass due to menopause?
Respuesta
  • primary osteoporosis/Type 1
  • primary osteoporosis/Type 11
  • secondary osteoporosis

Pregunta 36

Pregunta
According to WHO, if a healthy female age 36 (female with no known medical condition present, all body parts working perfecting) has a T-score of 1 6 SD how would she be diagnosed?
Respuesta
  • normal
  • osteopenia
  • osteoporosis
  • none of the above

Pregunta 37

Pregunta
Which of the following term best describes the sum of data values divided by the number of values?
Respuesta
  • the mean
  • the standard deviation
  • the variance
  • the coefficient

Pregunta 38

Pregunta
How many decimal places to the right of the decimal point is used in reporting the T-scores?
Respuesta
  • 0
  • 1
  • 2
  • 3

Pregunta 39

Pregunta
At low energies the majority of x-ray interactions are:
Respuesta
  • Compton scattering
  • photoelectric
  • photodisintegration
  • pair production

Pregunta 40

Pregunta
What concept should always guide radiation protection effects?
Respuesta
  • time
  • distance
  • shielding
  • ALARA

Pregunta 41

Pregunta
If a patient has a history of hyper-parathyroidism, which of the following would be the preferred site to evaluate ?
Respuesta
  • proximal femur
  • spine
  • ultradistal
  • 33% or 1/3 forearm

Pregunta 42

Pregunta
Which of the following classes of cells are involved in bone remodeling?
Respuesta
  • osteoblasts
  • osteoclasts
  • osteocytes
  • a and b
  • all of the above

Pregunta 43

Pregunta
Which of the following has the highest percentage of cortical bone?
Respuesta
  • femoral neck
  • fingers
  • whole body
  • 33% radius

Pregunta 44

Pregunta
Which of the following bone parameters is measured in grams per centimeter squared?
Respuesta
  • area
  • BMC
  • BMD
  • BMMA

Pregunta 45

Pregunta
What is the percentage of trabecular bone in the skeleton?
Respuesta
  • 20%
  • 30%
  • 70%
  • 80%

Pregunta 46

Pregunta
How would start labeling the vertebral bodies on a PA lumbar scan?
Respuesta
  • Let the software do it all!
  • start at L1, and count/label down
  • start at L4, and count/label up

Pregunta 47

Pregunta
What is the major source of precision error in clinical practice?
Respuesta
  • equipment
  • physician
  • technologist
  • receptionist

Pregunta 48

Pregunta
Which of the following is correct?
Respuesta
  • BMD=BMC/Area
  • BMD=BMCxArea

Pregunta 49

Pregunta
During analyzes of the lumbar spine, what would help you identify the vertebral bodies?
Respuesta
  • read the manual
  • look for L3 ( longest transverse process)
  • their characteristic shapes
  • all of the above

Pregunta 50

Pregunta
A great forearm scan should include all of the following except:
Respuesta
  • forearm centered
  • forearm straight
  • free of artifacts
  • motion

Pregunta 51

Pregunta
Sunlight is the main source of vitamin:
Respuesta
  • A
  • C
  • D
  • K

Pregunta 52

Pregunta
Bisphosphonates prevent bone loss by:
Respuesta
  • reducing the activity of the osteoclasts
  • increasing the activity of the osteoblasts
  • increasing the activity of the osteoclasts

Pregunta 53

Pregunta
DXA results may be influenced by:
Respuesta
  • body thickness
  • degenerative changes
  • fractures
  • scan mode
  • all of the above

Pregunta 54

Pregunta
Which of the following would best describe the effective dose for a central DXA scan?
Respuesta
  • one-tenth of a chest x-ray
  • less than a day of background radiation
  • less than a round trip from Boston to LA
  • all of the above

Pregunta 55

Pregunta
When measuring the proximal femur, which of the following statements is true?
Respuesta
  • the neck ROI includes any portion of the greater trochanter
  • the neck ROI is perpendicular to the femoral neck
  • the neck ROI includes both ends in bone
  • I need to read the manual!!

Pregunta 56

Pregunta
Which of the following statements is true regarding DXA?
Respuesta
  • DXA has been widely studied and requires a radioactive source
  • DXA is faster than DPA but is not as precise
  • DXA can only predict fracture risk of the hip and spine
  • DXA can be used to predict fracture risk and to evaluate the effectiveness of treatment

Pregunta 57

Pregunta
How often should you perform the QA on the DXA unit?
Respuesta
  • once a week
  • once a year
  • every day you scan
  • only when you get a message on your monitor

Pregunta 58

Pregunta
Why is the non-dominant arm used in bone densitometry?
Respuesta
  • easier for the patient
  • easier for the technologist
  • its density values will be greater than that of the dominant arm
  • reference values reflect non-dominant arm measurements

Pregunta 59

Pregunta
If a patients BMC is 60.58 and the area is 61.60 what is her BMD?
Respuesta
  • 0.983
  • 1.01

Pregunta 60

Pregunta
All of the following are true, except:
Respuesta
  • accuracy is the ability to measure true value
  • accuracy is most important for diagnosis, less important for serial monitoring
  • accuracy is affected by the technologist
  • accuracy is affected by the technology

Pregunta 61

Pregunta
What is the distance a technologist should be away from the edge of the DXA table with a pencil beam scanner?
Respuesta
  • 2 feet
  • 3 feet
  • 4 feet
  • 10 feet

Pregunta 62

Pregunta
What is the most common osteoporotic fracture?
Respuesta
  • heel
  • hip
  • spine
  • wrist

Pregunta 63

Pregunta
Two bones with the same volumetric densities may have different densities when measured with DXA because:
Respuesta
  • poor precision
  • poor accuracy
  • differ in size
  • degenerative changes

Pregunta 64

Pregunta
Regarding the Shewart Rules, the control limits are based on what percentage of the average values?
Respuesta
  • 0.5%
  • 1%
  • 1.5%
  • 2%

Pregunta 65

Pregunta
All follow-up DXA scans should be compared to:
Respuesta
  • any prior scan
  • the most recent scan
  • the baseline scan
  • Operator’s choice!

Pregunta 66

Pregunta
With DXA, regarding the PA spine, which vertebra is expected to have the lowest bone mineral density?
Respuesta
  • L1
  • L2
  • L3
  • L4

Pregunta 67

Pregunta
A DXA scanner that uses a single detector and a pinhole collimator is:
Respuesta
  • a fan beam scanner
  • a pencil beam scanner
  • an aerial beam scanner

Pregunta 68

Pregunta
The characteristic shapes of the vertebrae seen on the spine DXA image are primarily based on the appearance of the:
Respuesta
  • transverse processes
  • vertebral bodies
  • posterior elements of the vertebra
  • intervertebral discs

Pregunta 69

Pregunta
When scanning the proximal femur, what is the anatomical landmark to look at if you have correct rotation?
Respuesta
  • the femoral head
  • the greater trochanter
  • the lesser trochanter
  • the ischium

Pregunta 70

Pregunta
To determine the least significant change at 95% confidence level (for baseline and one follow-up scan), what is the "number" which the precision error is multiplied to determine the least significant change?
Respuesta
  • 2.77
  • 1.96
  • 1.81
  • 1.28

Pregunta 71

Pregunta
A technologist should perform a precision study in order to:
Respuesta
  • quantify the shifts and drifts(QA)
  • calculate the LSC
  • To see how great you are!
  • To see how great your doc is doing!

Pregunta 72

Pregunta
How many places to the right of the decimal point is used in reporting BMD?
Respuesta
  • 0
  • 1
  • 2
  • 3

Pregunta 73

Pregunta
The name of the forearm sites is based on what?
Respuesta
  • the location of the site on the bone in relationship to the overall length of the radius
  • the location of the site on the bone in relationship to the overall length of the ulna
  • % of cortical bone found at that site
  • % of trabecular bone found at that site

Pregunta 74

Pregunta
What skeletal site may be preferred for assessing early menopause or following oophorectomy?
Respuesta
  • Calcaneus
  • Forearm
  • Hip
  • spine

Pregunta 75

Pregunta
When analyzing the PA spine, which of the following is a "no can do?
Respuesta
  • Spine straight and centered within the ROI
  • The top line of the ROI positioned between T12 and L1
  • The bottom of the line of the ROI positioned between L4 and L5
  • Width is operator’s choice

Pregunta 76

Pregunta
If you are very fortunate, and you get a new DXA unit, what must be performed in order to do compare studies?
Respuesta
  • establish QC program
  • cross-calibration

Pregunta 77

Pregunta
All of the following are examples of weight-bearing exercise except:
Respuesta
  • running
  • dancing
  • racket sports
  • lap swimming

Pregunta 78

Pregunta
What type of bone with long term use of steroids affect?
Respuesta
  • trabecular
  • cancellous
  • Cortical
  • Compact
  • a and b
  • b and c
  • c and d

Pregunta 79

Pregunta
If a patient has had an Iaminectomy, how would that affect the results?
Respuesta
  • increase BMD
  • decrease BMD
  • nothing at all

Pregunta 80

Pregunta
What are the two most common methods for shifting the energies in DXA units?
Respuesta
  • energy switching
  • K-edge filtration
  • Compton effect
  • photoelectric effect

Pregunta 81

Pregunta
Why do you use a leg block, when performing a PA spine DXA scan? Select all that appy.
Respuesta
  • reduce Iordotic curve
  • separate the verebrae
  • may feel good to the patient
  • Operator’s manual said so!

Pregunta 82

Pregunta
What is the term often used to express the precision of the DXA unit?
Respuesta
  • mean
  • standard deviation
  • linear regression

Pregunta 83

Pregunta
Why do you use a “hip positioner", during scanning of the proximal femur?
Respuesta
  • to place the femoral neck parallel to the tabletop
  • to place the ward's area in the correct location
  • to obtain the total hip results
  • because you have it!

Pregunta 84

Pregunta
lf a patients is found to have coins in their pocket while obtaining the proximal femur what should you do.
Respuesta
  • scan the other hip
  • scan the forearm
  • remove the coins and rescan the hip
  • remove the coins and keep them!

Pregunta 85

Pregunta
A patient with an elevated alkaline phosphatase may be an indicator of
Respuesta
  • osteoporosis
  • osteomalacia
  • osteopetrosis
  • Pagets

Pregunta 86

Pregunta
What is the percentage of cortical bone (compact bone) in the skeleton?
Respuesta
  • 20%
  • 30%
  • 70%
  • 80%

Pregunta 87

Pregunta
What angle should the patient's leg be positioned on the leg block for the PA spine?
Respuesta
  • 30-60 degrees
  • 40-60 degrees
  • 60-80 degrees
  • 60-90 degrees

Pregunta 88

Pregunta
What year was the Bone Mass Measurement Act proposed?
Respuesta
  • 1991
  • 1993
  • 1997
  • 1998

Pregunta 89

Pregunta
What pharmaceutical may be suggested for a woman with high risk of breast cancer and elevated lipids?
Respuesta
  • Actonel
  • Evista
  • Fosamax
  • Prolia

Pregunta 90

Pregunta
In bone densitometry, what describes the ability to reproduce the measurement when it is performed under identical conditions?
Respuesta
  • absolute risk
  • accuracy
  • precision
  • relative risk

Pregunta 91

Pregunta
Decide which of the following is the most important factor to consider when performing a DXA scan?
Respuesta
  • make sure pt is comfortable
  • make sure patient removes items that may attenuate the beam
  • make sure patient is NPO
  • make sure that you have the correct patient!

Pregunta 92

Pregunta
How can a patient be deprived of vitamin D?
Respuesta
  • reduction in dietary intake
  • malabsorption of fats
  • not exposed to sunlight
  • all of the above

Pregunta 93

Pregunta
Which of the following calcium supplements should be the choice for women who are at risk of kidney stone formation?
Respuesta
  • calcium carbonate
  • calcium citrate
  • calcium gluconate
  • calcium lactate

Pregunta 94

Pregunta
The correct way to measure radiation dose is as effective dose, expressed as:
Respuesta
  • uGy
  • uSv
  • uCi
  • rad

Pregunta 95

Pregunta
All of the following are risk factors for 733 except:
Respuesta
  • smoking
  • drinking 48 ounces of coffee a day
  • alcohol use
  • obesity

Pregunta 96

Pregunta
QUS what is the gold standard to measure bone density?
Respuesta
  • DPA
  • DXA
  • QCT
  • QUS

Pregunta 97

Pregunta
Cortical bone makes up what?
Respuesta
  • the inner core of the bones
  • the outer core of the bones

Pregunta 98

Pregunta
All of the following are correct except:
Respuesta
  • osteoporosis is usually asymptomatic
  • back pain and height loss may be the first signs of osteoporosis
  • kyphosis is common in patients with osteoporosis
  • African Americans are at higher risk to develop osteoporotic in comparison to Asians

Pregunta 99

Pregunta
What are the four classifications that apply to the heel?
Respuesta
  • appendicular, predominately trabecular and weight-bearing
  • axial, peripheral, predominantly cortical and non weight-bearing

Pregunta 100

Pregunta
Secondary osteoporosis is defined as:
Respuesta
  • bone loss caused by factors other than estrogen deficiency
  • bone loss caused by factors other than aging
  • bone loss caused by factors other than estrogen deficiency and aging
  • none of the above

Pregunta 101

Pregunta
The forearm, pelvis, and scapula all belong to which skeletal classification?
Respuesta
  • appendicular
  • axial
  • central
  • weight-bearing
  • a and b

Pregunta 102

Pregunta
When there is an imbalance/uncoupling of the remodeling cycle, the result is
Respuesta
  • an increase in the calcium
  • a decrease in the resorption
  • a net gain in the bone mass
  • a net loss in the bone mass

Pregunta 103

Pregunta
During a DXA of the hip of a thin patient, a mottled or moth eaten appearance at the edge is seen, what may be helpful to correct this?
Respuesta
  • use a higher speed setting
  • use a slower speed setting
  • can another site
  • get the next patient!

Pregunta 104

Pregunta
What is the bone edge detection methodology?
Respuesta
  • it tests the machine's ability to measure BMD
  • it tests the machine's ability to distinguish bone from soft tissue
  • it verifies the machine is calibrated correctly

Pregunta 105

Pregunta
What sites are preferred for children?
Respuesta
  • Iumbar spine and hip(s)
  • lumbar spine, hip, and forearm
  • lumbar spine and TBLH
  • lumbar spine only

Pregunta 106

Pregunta
In making a diagnosis for children, what are some guidelines? Select all that apply.
Respuesta
  • Z--scores are used
  • low for age is preferred over the term osteopenia
  • pediatric software is highly recommended
  • osteoporosis can be made with a Z-score of -2.5 SD

Pregunta 107

Pregunta
What is the only anabolic pharmaceutical on the market for treatment of osteoporosis?
Respuesta
  • calcitonin
  • zoledronic acid
  • aloxifene
  • teriparatide

Pregunta 108

Pregunta
Although the technology is similar with all the DXA units, the BMD results are different because...select all that apply.
Respuesta
  • due to different calibration standards
  • algorithms to calculate BMD
  • differences in the region of interest
  • databases
  • All of the above

Pregunta 109

Pregunta
For low energies, the most common process of absorption is the:
Respuesta
  • Compton effect
  • pair production
  • photoelectric effect
  • photodisintegration

Pregunta 110

Pregunta
How many patients and how many times do you scan them in order to perform a precision study? Select all that apply.
Respuesta
  • 10 patients 3 times
  • 15 patients 3 times
  • 20 patients 2 times
  • 30 patients 2 times

Pregunta 111

Pregunta
Phantoms that mimic the shape and size of a skeletal region are called:
Respuesta
  • block phantom
  • brass phantom
  • anthromomorphic phantom
  • hydroxyaptite

Pregunta 112

Pregunta
If the QC graph shows a gradual decline in BMD overtime, what should you do?
Respuesta
  • repeat the QC
  • Re-establish a baseline value
  • call the manufacturer for service
  • upgrade your unit

Pregunta 113

Pregunta
Regarding bone densitometry, which of the following best describes accuracy?
Respuesta
  • the degree to which the measurement of BD reflects true value
  • the degree to which the QC reflects true value
  • the degree to which the %CV reflects true value

Pregunta 114

Pregunta
Which of the following are clinical signs and consequences of vertebral fractures? Select all that apply.
Respuesta
  • kyphosis
  • weight loss
  • reduced lung function
  • increase in height

Pregunta 115

Pregunta
All of the following are markers of bone formation, except?
Respuesta
  • 24-hour excretion rate of calcium
  • serum alkaline phosphatase
  • serum osteocalcin

Pregunta 116

Pregunta
Pencil beam DXA units usually have shorter scanning times and better resolution compared to fan beam units.
Respuesta
  • True
  • False

Pregunta 117

Pregunta
Quantitative ultrasonometry measures the broad band attenuation properties of bone.
Respuesta
  • True
  • False

Pregunta 118

Pregunta
The correct term for the scanning pattern of a pencil beam unit is rectilinear.
Respuesta
  • True
  • False

Pregunta 119

Pregunta
Archiving patient’s scans and running the system back-up are one in the same.
Respuesta
  • True
  • False

Pregunta 120

Pregunta
The weight Iimit for the DXA table is manufacturer specific?
Respuesta
  • True
  • False

Pregunta 121

Pregunta
When analyzing the proximal femur the box measuring the neck should include the greater trochanter.
Respuesta
  • True
  • False

Pregunta 122

Pregunta
In regards to the International society for Clinical Densitometry 2013 Official Positions, Osteoporosis cannot be diagnosed in men under the age 50 on the basis of BMD alone.
Respuesta
  • True
  • False

Pregunta 123

Pregunta
Cortical bone is also known as cancellous bone.
Respuesta
  • True
  • False

Pregunta 124

Pregunta
With fan beam scanners, scanning occurs point by point.
Respuesta
  • True
  • False

Pregunta 125

Pregunta
Discordance is a term that is rarely used in DXA.
Respuesta
  • True
  • False

Pregunta 126

Pregunta
The smaller the %CV, the better the accuracy and precision.
Respuesta
  • True
  • False

Pregunta 127

Pregunta
Rheumatoid arthritis can contribute to the development of osteoporosis.
Respuesta
  • True
  • False

Pregunta 128

Pregunta
Bone loss occurs when resorption exceeds formation.
Respuesta
  • True
  • False

Pregunta 129

Pregunta
T-scores are useful for the expression of relative risk.
Respuesta
  • True
  • False

Pregunta 130

Pregunta
T-scores should be used in serial monitoring.
Respuesta
  • True
  • False

Pregunta 131

Pregunta
Sievert refers to effective dose.
Respuesta
  • True
  • False

Pregunta 132

Pregunta
The measure of the variability or the spread of data around the mean is termed standard deviation.
Respuesta
  • True
  • False

Pregunta 133

Pregunta
Accuracy is most important for diagnosis, less important for serial monitoring.
Respuesta
  • True
  • False

Pregunta 134

Pregunta
The ultra distal part of the forearm is mostly trabecular bone.
Respuesta
  • True
  • False

Pregunta 135

Pregunta
With VFA, you are measuring the BMD L4 through T4.
Respuesta
  • True
  • False

Pregunta 136

Pregunta
Cortical bone is primarily affected with an estrogen deficient woman.
Respuesta
  • True
  • False

Pregunta 137

Pregunta
Precision is the ability to reproduce a measurement when performed under identical conditions.
Respuesta
  • True
  • False

Pregunta 138

Pregunta
When a patient comes back for a follow-up scan, it's no problem if you don't use the compare/copy function.
Respuesta
  • True
  • False

Pregunta 139

Pregunta
The Tanner and Whitehouse (TW2) method is often used to indicate bone age in children.
Respuesta
  • True
  • False

Pregunta 140

Pregunta
The T-score is the number of SDs an individual’s BMD is from the average BMD for sex-matched young normal peak bone mass.
Respuesta
  • True
  • False

Pregunta 141

Pregunta
Caucasians and Asians are at increased risk to developing osteoporosis compared to otherethnic groups.
Respuesta
  • True
  • False

Pregunta 142

Pregunta
Smoking is not recognized as a risk factor for the development of osteoporosis.
Respuesta
  • True
  • False

Pregunta 143

Pregunta
With fan beam scanners a solid state/multi element array detector system is used.
Respuesta
  • True
  • False

Pregunta 144

Pregunta
DXA BMD measures the amount of mineralized tissue in the area scanned. (g/cm3)
Respuesta
  • True
  • False

Pregunta 145

Pregunta
Accuracy indicates how close a measured value is to the actual value.
Respuesta
  • True
  • False
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