Quiz: Positron Emission Tomography 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. 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 negative and thyroglobulin (Tg) is negative. I-131 whole body scan is negative and thyroglobulin (Tg) is positive. I-131 whole body scan is positive and thyroglobulin (Tg) is positive. None 2. All of the following scintigraphic methods are often used in the diagnosis of fever of unknown origin (FUO) EXCEPT: Fluorodeoxyglucose-positron emission tomography (FDG-PET) Labeled erythrocytes scintigraphy Labeled leukocytes scintigraphy Ga-67 citrate scintigraphy None 3. 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 Leg muscles The diaphragm None 4. Which of the following radionuclides used in PET imaging produces the highest resolution images? Rb-82. N-13. C-11. F-18. None 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: Shunt glucose to skeletal and cardiac muscles. Increase blood pressure. Induce hyperglycemia. Decrease heart rate. None 6. The concentration of glucose-6-phosphatase, an enzyme mediating dephosphorylation of FDG-6-phosphate, is low in most tumors EXCEPT: Hodgkin lymphoma. Lung adenocarcinoma. Ductal carcinoma. Hepatocellular carcinoma. None 7. All of the following cellular mechanisms are responsible for malignant cells increased F-18 fluorodeoxyglucose accumulation EXCEPT: Increased membrane transporters. Low glucose-6-phosphatase. Increased intracellular hexokinase. Low mitotic rate. None 8. A patient is required to extend the arms above the head during a PET/CT scan. Which of the following is the possible reason? Maximizes extension of the spine Helps the patient to hold breath Minimizes the patient's movement during the Scan Reduces possible artifact formation None 9. The usefulness of F-18 FDG PET in infection imaging is based on the fact that granulocytes and macrophages in infectious foci: Have high insulin production Have high glucose consumption Have high mitotic rate Have short life span None 10. 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: Blood pool. Muscle. Tumor. Bone marrow. None 1 out of 10 Time's upTime is Up! By Nasser AlMutairi|2021-09-20T13:16:27+03:00April 15th, 2021|Positron Emission Tomography| شارك هذه الصفحة FacebookXLinkedInWhatsAppPinterestEmail About the Author: Nasser AlMutairi Senior Nuclear Medicine Specialist at Hafar Al-Batin Central Hospital, Founder of NuclearMed Website. Leave A Comment Cancel replyComment Notify me of follow-up comments by email. Notify me of new posts by email. Δ
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