DXA UPDATED ACTUAL QUESTIONS AND CORRECT
ANSWERS
Question:
1. DXA can be conceptualized as a ______ technique
Answer:
Subtraction
Question:
2. What are the two basic types of bone?
Answer:
compact bone [cortical] and spongy bone [trabecular]
Question:
3. Which type of cell is chiefly responsible for bone resorption in the remodeling cycle?
Answer:
Osteoclast
Question:
4. When does peak bone mass occur?
Answer:
20-30 years old
Question:
5. Identify the risk factors associated with osteoporosis
Answer:
>female gender >increased age >low BMI
Question:
6. What are the two types of primary osteoporosis?
Answer:
TYPE 1 "Postmenopausal Osteoporosis" TYPE 2 "Senile Osteoporosis"
Question:
7. What are fragility fractures?
Answer:
low trauma fractures (vertebrae, wrist, femur, hip)
Question:
8. What are the advantages to a pencil beam system?
Answer:
Good resolution and reproduceability
Question:
9. What do we call when we compare BMD over length of time?
, Answer:
Serial scans
Question:
10. What are the two most commonly used sites in DEXA when measuring a patient's BMD?
Answer:
>L-spine >proximal femur
Question:
11. All of the following are features of bone densitometry examinations, except:
A. Assess bone strength.
B. Evaluate and stage bone cancers.
C. Monitor therapy.
D. Predict fracture risk
Answer:
B. Evaluate and stage bone cancers.
Question:
12. Which of the following are advantages of DEXA?
1. Low radiation dose
2. Readily available.
3. High resolution images
Answer:
1, 2, and 3
Question:
13. What does DEXA stand for?
Answer:
dual-energy x-ray absorptiometry
Question:
14. The effective radiation dose for DEXA is considerably ______ send the effective radiation dose for
conventional radiography
Answer:
Lower
Question:
15. The first commercial DEXA scanner was introduced
Answer:
1970s
Question:
16. ______ bone forms the dense compact outer shell of all bones and the shafts of the long bones. It
counts for approximately 80% of the skeletal mass.
Answer:
Cortical
ANSWERS
Question:
1. DXA can be conceptualized as a ______ technique
Answer:
Subtraction
Question:
2. What are the two basic types of bone?
Answer:
compact bone [cortical] and spongy bone [trabecular]
Question:
3. Which type of cell is chiefly responsible for bone resorption in the remodeling cycle?
Answer:
Osteoclast
Question:
4. When does peak bone mass occur?
Answer:
20-30 years old
Question:
5. Identify the risk factors associated with osteoporosis
Answer:
>female gender >increased age >low BMI
Question:
6. What are the two types of primary osteoporosis?
Answer:
TYPE 1 "Postmenopausal Osteoporosis" TYPE 2 "Senile Osteoporosis"
Question:
7. What are fragility fractures?
Answer:
low trauma fractures (vertebrae, wrist, femur, hip)
Question:
8. What are the advantages to a pencil beam system?
Answer:
Good resolution and reproduceability
Question:
9. What do we call when we compare BMD over length of time?
, Answer:
Serial scans
Question:
10. What are the two most commonly used sites in DEXA when measuring a patient's BMD?
Answer:
>L-spine >proximal femur
Question:
11. All of the following are features of bone densitometry examinations, except:
A. Assess bone strength.
B. Evaluate and stage bone cancers.
C. Monitor therapy.
D. Predict fracture risk
Answer:
B. Evaluate and stage bone cancers.
Question:
12. Which of the following are advantages of DEXA?
1. Low radiation dose
2. Readily available.
3. High resolution images
Answer:
1, 2, and 3
Question:
13. What does DEXA stand for?
Answer:
dual-energy x-ray absorptiometry
Question:
14. The effective radiation dose for DEXA is considerably ______ send the effective radiation dose for
conventional radiography
Answer:
Lower
Question:
15. The first commercial DEXA scanner was introduced
Answer:
1970s
Question:
16. ______ bone forms the dense compact outer shell of all bones and the shafts of the long bones. It
counts for approximately 80% of the skeletal mass.
Answer:
Cortical
