Download Bone Densitometry Review| 115 Questions all Answered Correctly| Guaranteed success| Update and more Exams Nursing in PDF only on Docsity!
Bone Densitometry Review| 115 Questions all
Answered Correctly| Guaranteed success|
Updated 2025- 2026
2.5 SDs or more below the young adult peak bone density According to WHO, for the diagnosis of osteoporosis, based on the measurement of bone density is a. 2.5 SDs or more below the young adult peak bone density and a fracture b. 2.5 SDs or more below the young adult peak bone density c. More than 1 SD but less than 2.5 SDs below the young adult peak bone density d. Not more than 1 SD below the young adult peak bone density DXA What is the most common technique that is used to measure BMD? a. QUS b. QCT c. SXA d. DXA Spine What is the most common osteoporotic fracture? a. Hip b. Shoulder
c. Spine d. Wrist Time In bone densitometry, what is the primary responsibility of the technologist? a. Beam collimation b. Distance c. Shielding d. Time Race Which of the following is considered an uncontrollable risk factor for osteoporosis? a. Exercise b. Lifestyle choices c. Smoking d. Race QCT spine Which of the following measures more trabecular bone? a. PA spine b. Lateral spine
c. Trabecular bone d. Osteophyte Osteoblasts New bone matrix is formed by: a. Osteoblasts b. Osteoclasts c. Cortical bone d. Cancellous bone 66% What percentage of trabecular bone is found in the PA spine? a. 1% b. 33% c. 50% d. 66% Serial DXA measurements of the hip and spine Currently, the most accurate method to determine a patient's response to therapy for osteoporosis is: a. Serial DXA measurements of the forearm b. Serial DXA measurements of the hip and spine
c. Serial QUS measurements of the calcaneus d. Serial QCT measurements of the spine Corticosteroid therapy Which of the following does not help in achieving peak bone mass? a. Normal puberty b. Exercise c. Corticosteroid therapy d. Adequate calcium and vitamin D intake The patients heel must be immersed in liquid during the procedure Which of the following statement is false concerning QUS advantages over x-ray base methodologies for BMD measurements? a. QUS units are comparatively inexpensive b. The patients heel must be immersed in liquid during the procedure c. Patients are not subjected to ionizing radiation d. Ultrasound examinations are quick to perform Proximal forearm Which of the following sites is mostly composed of cortical bone? a. Distal forearm b. Femoral neck
c. Iodine- 125 d. Technetium- 99 The rate of change in BMD is too slow The forearm is not used to monitor the effects of therapy for osteoporosis because: a. Accuracy is poor b. Precision is poor c. There is no effect d. The rate of change in BMD is too slow Forteo Which of the following is not a bisphosphonate? a. Alendronate b. Etodronate c. Forteo d. Zoledronic acid The osteoclasts The primary mechanism of action of anti-resorptive therapies is the result of direct interaction with: a. The bone lining cells b. The osteoblasts
c. The osteoclasts d. The osteocytes Only Caucasian postmenopausal women The WHO criteria for diagnosing osteoporosis was initially defined to apply to: a. All women b. All Caucasian women c. Only postmenopausal women d. Only Caucasian postmenopausal women Screening The measurement of peripheral BMD is advocated for: a. All individuals regardless of age b. Pediatrics c. Screening d. Males Posterior elements The PA spine mostly measures the: a. Posterior elements b. Vertebral bodies c. Transverse processes d. Pedicles
c. 20-25 degrees d. 25-30 degrees Males or females under age 20 When should Z-scores be used to make a diagnosis, instead of T-scores? a. Females 65 and older b. Males 65 and older c. Postmenopausal females d. Males or females under age 20 Bone mineral content Which of the following bone parameters is measured in grams? a. Area b. Bone mineral content c. Bone mineral density d. Total L Which lumbar vertebra has the widest transverse process? a. L b. L c. L d. L
Ward's area The region of the proximal femur lying on the border of the femoral neck is termed: a. Lesser trochanter b. Femoral head c. Hip axis length d. Ward's area Precision What is important for serial monitoring? a. Accuracy b. Precision Repeat the scan If the daily QC fails, (in the United States), what should be your first step of action? a. Repeat the scan b. Call the manufacturer c. Get yourself another cup of coffee d. Go home! Increase in the BMD
Which of the following term best describes the sum of data values divided by the number of values? a. The mean b. The standard deviation c. The variance d. The coefficient 1 How many decimal places to the right of the decimal point is used in reporting the T-scores? a. 0 b. 1 c. 2 d. 3 Photoelectric At low energies the majority of x-ray interactions are: a. Compton scattering b. Photoelectric c. Photodisintegration d. Pair production ALARA
What concept should always guide radiation protection effects? a. Time b. Distance c. Shielding d. ALARA 33% or 1/3 forearm If a patient has a history of hyperparathyroidism, which of the following would be the preferred site to evaluate? a. Proximal femur b. Spine c. Ultradistal d. 33% or 1/3 forearm All of the above Which of the following classes of cells are involved in bone remodeling? a. Osteoblasts b. Osteoclasts c. Osteocytes d. A and B e. All of the above 33% radius
How would you start labeling the vertebral bodies on a PA lumbar scan? a. Let the software do it all! b. Start at L1, and coulnt/label down c. Start at L4, and count/label up Technologist What is the major source of precision error in clinical practice? a. Equipment b. Physician c. Technologist d. Receptionist BMD=BMC/Area Which of the following is correct? a. BMD=BMC/Area b. BMD=BMCxArea All of the above During analyzes of the lumbar spine, what would help you identify the vertebral bodies? a. Read the manual b. Look for L3 (longest transverse process)
c. Their characteristic shapes d. All of the above Motion A great forearm scan should include all of the following except: a. Forearm centered b. Forearm straight c. Free of artifacts d. Motion D Sunlight is the main source of vitamin: a. A b. C c. D d. K Reducing the activity of the osteoclasts Bisphoshponates prevent bone loss by: a. Reducing the activity of the osteoclasts b. Increasing the activity of the osteoblasts c. Increasing the activity of the osteoclasts All of the above
DXA can be used to predict fracture risk and to evaluate the effectiveness of treatment Which of the following statements is true regarding DXA? a. DXA has been widely studied and requires a radioactive source b. DXA is faster than DPA but is not as precise c. DXA can only predict fracture risk of the hip and spine d. DXA can be used to predict fracture risk and to evaluate the effectiveness of treatment Every day you scan How often should you perform the QA on the DXA unit? a. Once a week b. Once a year c. Every day you scan d. Only when you get a message on your monitor Reference values reflect non-dominant arm measurements Why is the non-dominant arm used in bone densitometry? a. Easier for the patient b. Easier for the technologist c. Its density vales will be greater than that of the dominant arm d. Reference values reflect non-dominant arm measurements
If a patients BMC is 60.58 and the area is 61.60 what is her BMD? a. 0. b. 1. Accuracy is most important for diagnosis, less important for serial monitoring All of the following are true, except: a. Accuracy is the ability to measure true value b. Accuracy is most important for diagnosis, less important for serial monitoring c. Accuracy is affected by the technologist d. Accuracy is affected by the technology 3 feet What is the distance a technologist should be away from the edge of the DXA table with a pencil beam scanner? a. 2 feet b. 3 feet c. 4 feet d. 10 feet Spine What is the most common osteoporotic fracture? a. Heel
