Nuclear Medicine Exam Questions with 100% Correct Answers

Nuclear Medicine Exam Questions with 100% Correct Answers The physical half-life of a radionuclide is the time it takes A. For half of the substances to leave the body B. For the kit to become half expired C. For half of the substance to be metabolised D. For the nuclide to decay to one half of the original activity - answerD. For the nuclide to decay to one half of the original activity Which of the following can be said regarding effective half-life? A. It is always longer than the physical half-life B. It is always shorter than physical half-life but longer than the biologic half-life C. It is always longer than the biologic half-life but shorter than the physical half-life D. It is always shorter than both the physical and the biologic half-life - answerD. It is always shorter than both the physical and the biologic half-life Which of the following is not a desirable characteristic of radionuclides used for imaging? A. Photon energy between 50 to 500 keV B. Effective half-life long enough to permit imaging C. Low toxicity D. Particulate emission - answerD. Particulate emission Convert 23mXI to SI units A. 850kBq B. 850Gbq C. None of the above D. 850MBq - answerD. 850MBq In the event of a spill of 99mTc to clothes, one should immediately A. Enter a shower fully clothed B. Wash the clothes in hot water and then survey them to determine remaining activity C. Remove and store the clothes until they decay to background D. Remove and destroy the clothing - answerC. Remove and store the clothes until they decay to background Which of the following measures absorbed doses? A. mCi B. gray C. becquerel D. all of the above - answerB. gray The philosophy of the ALARA program is to keep the radiation dose A. As low as recently authorized B. As low as reasonably achievable C. As long as reasonably attained D. As long as reasonably acceptable - answerB. As low as reasonably achievable Beta emitters are effective for therapy because A. They do not harm healthy tissue B. They can be used for imaging as well as for therapy C. They have a short range in soft tissue D. They have short half lives - answerC. They have a short range in soft tissue What is the purpose of hydration and voiding after an injection for a bone scan? A. To reduce the radiation dose to the bladder B. To block the uptake of unlabelled technetium by the stomach C. To reduce the possibility of the urine contamination D. To obtain a superscan - answerA. To reduce the radiation dose to the bladder Which one of the following is a malignant bone disease? A. Paget´s disease B. Osteomyelitis C. Osteoid osteoma D. Ewing sarcoma - answerD. Ewing sarcoma What is not an indication for a bone scan? A. Metastatic disease B. Cellulitis C. Osteoporosis D. Avascular necrosis - answerC. Osteoporosis A bone scan showing relatively uniformly increased skeletal uptake of radiopharmaceutical withalmost absent renal and bladder activity is usually referred to as a A. Superscan B. Flare phenomena C. Renal failure D. Suprascan - answerA. Superscan What are common sites of bony met