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ARRT Bone Density Exam Study Set.
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ARRT Bone Density Exam Study Set.
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ARRT Bone Density Exam Study Set2 types of Serum Type 1 Peptides - ANS-1. c-terminal propeptides (PICP)
2. n-terminal propeptides (PINP)
3 basic parts of bone - ANS-1. cells/osteocytes (osteoclasts and osteoblasts)
2. matrix
3. inorganic calcium salts
3 Commercial DXA Units - ANS-1. Hologic
2. GE Healthcare
3. Norland
5 basic ways x-rays interact with matter - ANS-1. classical scatter
2. compton effect
3. photoelectric effect
4. pair production
5. photodisintegration effect
85% confidence level - ANS-1.84 x precision
90% confidence level - ANS-2.33 x precision
95% confidence level - ANS-2.77 x precision
A DXA scanner that uses a single detector and a pinhole collimator is a........ -
ANS-pencil beam scanner
A DXA system that employs a rare earth filtered x-ray source uses what type of
detector? - ANS-pulse counting
A great forearm scan should include....... - ANS--forearm centered
-forearm straight
-free of artifacts
,A postmenopausal woman with a femoral neck T-score of -2.0 SD below a young adult
is to be classified as....... - ANS-osteopenia
A technologist should perform a precision study in order to calculate _______________.
- ANS-LSC (Least Significant Change)
Abaloparatide (Tymlos) - ANS--stimulates osteoblast formation
-daily injection
-not recomended for patients with Paget's disease or bone mets
According to the WHO criteria, what is the diagnosis of osteoporosis based on the
measurement of bone density? - ANS-2.5 SD or more below the young adult peak bone
density
Accuracy - ANS--ability to measure true value
-most important for diagnosis
-less important for serial monitoring
-affected by the technology
Accuracy - ANS--degree to which the measured results deviate from the values
-ability to measure true value
-mostly affected by the technology
Activation - ANS-osteoclasts begin to form on the surface of the bone
Advantages of Dual Photon Absoptiometry (DPA) - ANS--allowed us to image the spine
and proximal femur
Advantages of DXA - ANS--low dose
-high resolution
-good precision
-stable calibration
-short scan time
,Advantages of DXA - ANS--no source decay that comes with an isotope
-reduced scan time
-precise
Advantages of QUS - ANS--no ionizing radiation
-portable
-inexpensive
After each fracture, Relative Risk multiplies by 2 - ANS-
Age factor for osteoporosis - ANS--postmenopausal
-early menopause (before age 45)
-bone loss is initiated by a dramtic decline in estrogen production by the ovaries
ALARA - ANS--as low as reasonably achievable
-encompasses all radiation safety measures
-minimies radiation dose
-foundation for radiation safety programs
Alendronate (Binosto) - ANS--inhibits osteoclasts
-taken orally
-taken weekly
Alendronate (Fosamax) - ANS--inhibits osteoclasts
-taken orally
-taken daily/weekly
, All follow up DXA scans should be compared to the ________scan - ANS-baseline
Although the technology is similar with all of the DXA units, the BMD results are
different because.......... - ANS--different calibration standards
-algorithms to calculate BMD
-differences in the ROI
-different databases
Aluminum Phantoms - ANS--used with Prodigy, DPX-NT and DPX-MD+
always pick the lowest T-score to make a diagnosis - ANS-
An increase in the overall bone mass of a patient is closely related to an accelerated
rate of bone ___________ and a reduced amount of _______________. -
ANS-formation; resorption
Anabolic Agents - ANS-stimulates osteoblastic formation
Antiresorptive Agents - ANS-inhibits osteoclasts
Aphasia - ANS-total or partial loss of the power to use or understand words
Appendicular skeleton - ANS-pelvic girdle, limbs, hands and feet
Areas of the body where cortical (compact) bone is found) - ANS--femoral neck
-fingers
-proximal forearm
-distal forearm
Areas of the body where trabecular (cancellous) bone is found - ANS--spine
-Ward's Area
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