Certified Bone Densitometry Technologist (CBDT) Exam
Questions And 100% Correct Answers
Absorptiometry - Answer a method of measuring bone mineral density using the
ateenuation of x-ray or gamma radiation
Accuracy - Answer The degree to which a measurement value estimates the actual
value of the quantity being measured.
- percent or absolute differences
Age-matched - Answer a comparison of the patient's BMD to a reference population of
the same age/sex
Air ratio - Answer a value derivied from the QA procedure which incidates the quotient
of the air value at 70 keV divded by the air value at 38 keV for the scan table
Osteoporosis - Answer three definitions
old- reduced amount of bone that is qualitatively normal
modern- a systematic skeletal disease characterized by low bone mass
new- a skeletal disorder characterized by comprised bone strength predisposition to an
increased risk for fracture. bone strength reflects on bone density and bone quality
Bone Matrix - Answer 90% collagen
10% proteins
Bone Mineral - Answer hydroxyapatite ( Ca and phosphorus)
Bone Cells - Answer Osteoclasts, osteoblasts, osteocytes, and lining cells
, Bone Growth - Answer a result of modeling: renewl of bones and alteratin of size and
shape of the bone
Bone Health - Answer maintained by remodeling: replacement of old bone with new
bone
Bone Remodeling - Answer osteoclasts
removes old bone (resorption)
osteoblasts produce a new bone matrix
becomes mature bone ( formation)
When does bone loss occur? - Answer bone loss occurs when resorption exceeds
formation
Osteocytes - Answer derived from osteoblasts
regulators and remodelers
sense mechanical loading and mircocracks
Peak Bone Mass - Answer maximum BMD
dertermients- herediting, sex, race, lifestyle factors
BMD and Age - Answer increases during adolescence
peak during- teens or early 20's
Bone loss - Answer occurs at a rate of 0.5-1.0% per year
accelerates with menopause
Questions And 100% Correct Answers
Absorptiometry - Answer a method of measuring bone mineral density using the
ateenuation of x-ray or gamma radiation
Accuracy - Answer The degree to which a measurement value estimates the actual
value of the quantity being measured.
- percent or absolute differences
Age-matched - Answer a comparison of the patient's BMD to a reference population of
the same age/sex
Air ratio - Answer a value derivied from the QA procedure which incidates the quotient
of the air value at 70 keV divded by the air value at 38 keV for the scan table
Osteoporosis - Answer three definitions
old- reduced amount of bone that is qualitatively normal
modern- a systematic skeletal disease characterized by low bone mass
new- a skeletal disorder characterized by comprised bone strength predisposition to an
increased risk for fracture. bone strength reflects on bone density and bone quality
Bone Matrix - Answer 90% collagen
10% proteins
Bone Mineral - Answer hydroxyapatite ( Ca and phosphorus)
Bone Cells - Answer Osteoclasts, osteoblasts, osteocytes, and lining cells
, Bone Growth - Answer a result of modeling: renewl of bones and alteratin of size and
shape of the bone
Bone Health - Answer maintained by remodeling: replacement of old bone with new
bone
Bone Remodeling - Answer osteoclasts
removes old bone (resorption)
osteoblasts produce a new bone matrix
becomes mature bone ( formation)
When does bone loss occur? - Answer bone loss occurs when resorption exceeds
formation
Osteocytes - Answer derived from osteoblasts
regulators and remodelers
sense mechanical loading and mircocracks
Peak Bone Mass - Answer maximum BMD
dertermients- herediting, sex, race, lifestyle factors
BMD and Age - Answer increases during adolescence
peak during- teens or early 20's
Bone loss - Answer occurs at a rate of 0.5-1.0% per year
accelerates with menopause
