Skeletal System Scintigraphy Questions and Answers

Skeletal System Scintigraphy Questions and
Answers
Which of the following is a malignant bone disease?
(a) Paget's disease
(b) Ewing's sarcoma
(c) Osteomyelitis

(d) Osteoid osteoma - ✅✅(b) Ewing's sarcoma


A three-phase bone scan is often done to differentiate
(a) Osteoporosis vs. cellulitis
(b) Osteomyelitis vs. diskitis
(c) Osteomyelitis vs. cellulitis

(d) Osteoporosis vs. septic arthritis - ✅✅(c) Osteomyelitis vs. cellulitis


The presence of gastric and thyroid activity on a bone scan signals the presence
of:
(a) Metastatic disease
(b) Free pertechnetate
(c) Radionuclide impurity

(d) Reducing agent - ✅✅(b) Free pertechnetate


What is the purpose of a reducing agent in a 99mTc diphosphonate kit?
(a) To oxidize technetium
(b) To lower the valence state of technetium

, (c) To improve the tag efficiency
(d) Both (b) and (c)

(e) (a), (b), and (c) - ✅✅(d) Both (b) and (c)


What is the dose of 99mTc MDP most often prescribed for a planar bone scan?
(a) 1-3 mCi
(b) 5-10 mCi
(c) 20-30 mCi

(d) 30-35 mCi - ✅✅(c) 20-30 mCi


Which of the following is least likely to cause an artifact on bone scan?
(a) Snap on trousers
(b) Colostomy bag
(c) Skin contaminated by urine

(d) Injection site - ✅✅(b) Colostomy bag


What is not an indication for a bone scan?
(a) Metastatic disease
(b) Osteoporosis
(c) Cellulitis

(d) Avascular necrosis - ✅✅(b) Osteoporosis


The presence of free pertechnetate on a bone scan may be the result of:
(a) Using a radiopharmaceutical which was prepared too long ago