ARRT Bone Density Exam Study Set Newest
2026 Questions and Correct Detailed Answers
Already Graded A+
Why is the non-dominant arm used in bone densitometry? - CORRECT
ANSWER-reference values reflect non-dominant arm measurements
When measuring the proximal femur, how should the neck ROI be placed? -
CORRECT ANSWER-the neck ROI should be perpendicular to the femoral neck
What is the bone edge detection methodology? - CORRECT ANSWER-it tests
the machines ability to distinguish bone from soft tissue
What are the two most common methods for shifting the energies in DXA units? -
CORRECT ANSWER--energy shifting
-k-edge filters
Why do you use the hip positioner during scanning of the proximal femur? -
CORRECT ANSWER-to place the femoral neck parallel to the tabletop
,Bisphosphonates prevent bone loss by.... - CORRECT ANSWER-reducing the
activity of the osteoclasts
According to the WHO criteria, what is the diagnosis of osteoporosis based on the
measurement of bone density? - CORRECT ANSWER-2.5 SD or more below the
young adult peak bone density
What is the gold standard technique for measuring bone density? - CORRECT
ANSWER-DXA
Cancellous bone is also know as? - CORRECT ANSWER-Trabecular Bone
What is the anatomical landmark on the proximal femur that gives the best visual
indication of the degree of rotation of the proximal femur? - CORRECT
ANSWER-Lesser Trochanter
Which lumbar vertebra is described as having a characteristic shape of an X or and
H on a DXA PA spine scan? - CORRECT ANSWER-L4
Is Forteo a bisphosphonate? - CORRECT ANSWER-NO
,Quantitative Computated Tomography (QCT) - CORRECT ANSWER--
measurements are volumetric
-trabecular bone can be isolated from cortical bone
-accuracy may be affected by marrow fat
Peripheral BMD measurements are advocated for _____________? - CORRECT
ANSWER-Screening
What is the most important clinical consequence of osteoporosis? - CORRECT
ANSWER-Fracture
What is the name of the tool that integrates clinical information in a quantitative
manner to predict a 10-year probability of major osteoporotic fracture for both
men and women? - CORRECT ANSWER-FRAX
What is the major source of precision error in clinical practice? - CORRECT
ANSWER-Technologist
, What is the percentage of trabecular bone in the skeleton? - CORRECT
ANSWER-20 %
The forearm is not used to monitor the effects of therapy for osteoporosis
because....... - CORRECT ANSWER-rate of change in BMD is too slow
What site is mostly composed of cortical bone? - CORRECT ANSWER-Proximal
forearm
What are the advantages of QUS over x-ray methodologies for BMD
measurement? - CORRECT ANSWER--ultrasound is comparatively inexpensive
-patients are not subjected to ionizing radiation
-ultrasound exams are quick to perform
What is the name of the isotope that was used in SPA? - CORRECT ANSWER-
Iodine-125
What is the texture index that evaluates the pixel gray-level variations in lumber
spine DXA images? - CORRECT ANSWER-TBS (Trabecular Bone Score)
2026 Questions and Correct Detailed Answers
Already Graded A+
Why is the non-dominant arm used in bone densitometry? - CORRECT
ANSWER-reference values reflect non-dominant arm measurements
When measuring the proximal femur, how should the neck ROI be placed? -
CORRECT ANSWER-the neck ROI should be perpendicular to the femoral neck
What is the bone edge detection methodology? - CORRECT ANSWER-it tests
the machines ability to distinguish bone from soft tissue
What are the two most common methods for shifting the energies in DXA units? -
CORRECT ANSWER--energy shifting
-k-edge filters
Why do you use the hip positioner during scanning of the proximal femur? -
CORRECT ANSWER-to place the femoral neck parallel to the tabletop
,Bisphosphonates prevent bone loss by.... - CORRECT ANSWER-reducing the
activity of the osteoclasts
According to the WHO criteria, what is the diagnosis of osteoporosis based on the
measurement of bone density? - CORRECT ANSWER-2.5 SD or more below the
young adult peak bone density
What is the gold standard technique for measuring bone density? - CORRECT
ANSWER-DXA
Cancellous bone is also know as? - CORRECT ANSWER-Trabecular Bone
What is the anatomical landmark on the proximal femur that gives the best visual
indication of the degree of rotation of the proximal femur? - CORRECT
ANSWER-Lesser Trochanter
Which lumbar vertebra is described as having a characteristic shape of an X or and
H on a DXA PA spine scan? - CORRECT ANSWER-L4
Is Forteo a bisphosphonate? - CORRECT ANSWER-NO
,Quantitative Computated Tomography (QCT) - CORRECT ANSWER--
measurements are volumetric
-trabecular bone can be isolated from cortical bone
-accuracy may be affected by marrow fat
Peripheral BMD measurements are advocated for _____________? - CORRECT
ANSWER-Screening
What is the most important clinical consequence of osteoporosis? - CORRECT
ANSWER-Fracture
What is the name of the tool that integrates clinical information in a quantitative
manner to predict a 10-year probability of major osteoporotic fracture for both
men and women? - CORRECT ANSWER-FRAX
What is the major source of precision error in clinical practice? - CORRECT
ANSWER-Technologist
, What is the percentage of trabecular bone in the skeleton? - CORRECT
ANSWER-20 %
The forearm is not used to monitor the effects of therapy for osteoporosis
because....... - CORRECT ANSWER-rate of change in BMD is too slow
What site is mostly composed of cortical bone? - CORRECT ANSWER-Proximal
forearm
What are the advantages of QUS over x-ray methodologies for BMD
measurement? - CORRECT ANSWER--ultrasound is comparatively inexpensive
-patients are not subjected to ionizing radiation
-ultrasound exams are quick to perform
What is the name of the isotope that was used in SPA? - CORRECT ANSWER-
Iodine-125
What is the texture index that evaluates the pixel gray-level variations in lumber
spine DXA images? - CORRECT ANSWER-TBS (Trabecular Bone Score)
