PET A multiple-choice quiz consists of: 10 QuestionsQuestions are selected randomly from a collection of 17 questions. More Questions You will get deferent questions every time you take the quiz. Correct AnswersThere could be more than one correct answer, select all that apply.Skip QuestionsYou are allowed to scroll backward and forward before submitting your answers.10 MinutesThe quiz has a time limit. Time's up You can still submit your answers after the allowed period of time has ended . When ready, click Next to start the quiz. Name (Required) Email (Optional) Twitter (Optional) 1. All of the following scintigraphic methods are often used in the diagnosis of fever of unknown origin (FUO) EXCEPT: Labeled leukocytes scintigraphy Ga-67 citrate scintigraphy Labeled erythrocytes scintigraphy Fluorodeoxyglucose-positron emission tomography (FDG-PET) 2. A 65-year-old patient is referred for a brain PET/MR study. The referring physician reports placement of a titanium alloy brain clips for an intracranial aneurysm 5 years ago. Which of the following would be the most appropriate action regarding imaging this case? Perform the study regardless the system type or field strength It is contraindicated to perform the exam as titanium alloy is ferromagnetic Perform PET only. Perform the exam using 0.5 Tesla systems or less 3. High glucose levels may interfere with tumor targeting due to competitive inhibition of FDG uptake by d-glucose. FDG-PET study should not be recommended when the glucose level in the blood exceeds: 200 mg/dl. 120 mg/dl. 175 mg/dl. 155 mg/dl. 4. The usefulness of F-18 FDG PET in infection imaging is based on the fact that granulocytes and macrophages in infectious foci: Have high glucose consumption Have short life span Have high mitotic rate Have high insulin production 5. The elevated serum glucose level at the time of fluorodeoxyglucose (FDG) administration may decrease the sensitivity of the FDG-PET study. Althoguh intravenous bolus of insulin may effectively lower the serum glucose level, however induced hyperinsulinemia will: Decrease heart rate. Induce hyperglycemia. Shunt glucose to skeletal and cardiac muscles. Increase blood pressure. 6. The time from F-18 fluorodeoxyglucose (FDG) administration to the time of data acquisition has been shown to have a marked effect on FDG uptake. An increased interval between the injection and imaging uptake time will DECREASE radiotracer concentration in: Muscle. Blood pool. Bone marrow. Tumor. 7. The majority of radiation exposure to personnel performing PET/CT procedures comes from the: CT scanner PET scanner Injected patient Unopened dose pig 8. Localizing metastatic disease in thyroid cancer patients with F-18 fluorodeoxyglucose (FDG) PET imaging is the primary clinical indication if: I-131 whole body scan is positive and thyroglobulin (Tg) is negative. I-131 whole body scan is positive and thyroglobulin (Tg) is positive. I-131 whole body scan is negative and thyroglobulin (Tg) is negative. I-131 whole body scan is negative and thyroglobulin (Tg) is positive. 9. Before FDG administration, the patient relaxes in a waiting room to minimize muscular activity, and in so doing minimizes any physiological uptake of FDG in the muscles. Hyperventilation may cause increased uptake in the: Arm muscles The peritoneum The diaphragm Leg muscles 10. Which of the following radionuclides used in PET imaging produces the highest resolution images? C-11. N-13. F-18. Rb-82. 1 out of 10 Time is Up! Time's up By Nasser AlMutairi|2021-04-07T10:58:49+03:00April 7th, 2021| Share This Post With Others! FacebookTwitterLinkedInWhatsAppPinterestEmail About the Author: Nasser AlMutairi Senior Nuclear Medicine Specialist at Hafar Al-Batin Central Hospital, Founder of NuclearMed Website. Member of SSNMMI Executive Committee. Leave a Reply Cancel reply
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