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. 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 short life span Have high mitotic rate None 2. F-18 FDG uptake in tumors correlates with tumor: Volume and stability. Growth and viability. Shape and reproducibility. Size and contractility. None 3. F-18 is a cyclotron-produced radioisotope with a half-life approximately of: 110 min. 11 min. 101 min. 119 min. None 4. Which of the following radionuclides used in PET imaging produces the highest resolution images? Rb-82. C-11. F-18. N-13. None 5. 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 Reduces possible artifact formation Minimizes the patient's movement during the Scan None 6. 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. None 7. 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: Increase blood pressure. Decrease heart rate. Induce hyperglycemia. Shunt glucose to skeletal and cardiac muscles. None 8. All of the following cellular mechanisms are responsible for malignant cells increased F-18 fluorodeoxyglucose accumulation EXCEPT: Low glucose-6-phosphatase. Increased intracellular hexokinase. Increased membrane transporters. Low mitotic rate. None 9. The concentration of glucose-6-phosphatase, an enzyme mediating dephosphorylation of FDG-6-phosphate, is low in most tumors EXCEPT: Hodgkin lymphoma. Ductal carcinoma. Hepatocellular carcinoma. Lung adenocarcinoma. None 10. The term “partial volume effect” is caused by the limited resolution of PET scanners and refers to phenomenon that make intensity values in images differ from what they ideally should be. The “hot” spot smaller than twice the resolution of the scanner will have total counts preserved and will appear: Smaller with a lower activity concentration Larger with a higher activity concentration Larger with a lower activity concentration Smaller with a higher activity concentration 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| Share This Post With Others! 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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