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. Which of the following radionuclides used in PET imaging produces the highest resolution images? Rb-82. C-11. F-18. N-13. 2. 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: Induce hyperglycemia. Decrease heart rate. Shunt glucose to skeletal and cardiac muscles. Increase blood pressure. 3. 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 positive. I-131 whole body scan is negative and thyroglobulin (Tg) is positive. I-131 whole body scan is positive and thyroglobulin (Tg) is negative. I-131 whole body scan is negative and thyroglobulin (Tg) is negative. 4. F-18 is a cyclotron-produced radioisotope with a half-life approximately of: 119 min. 110 min. 11 min. 101 min. 5. The majority of radiation exposure to personnel performing PET/CT procedures comes from the: CT scanner PET scanner Unopened dose pig Injected patient 6. 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? It is contraindicated to perform the exam as titanium alloy is ferromagnetic Perform PET only. Perform the study regardless the system type or field strength Perform the exam using 0.5 Tesla systems or less 7. All of the following scintigraphic methods are often used in the diagnosis of fever of unknown origin (FUO) EXCEPT: Labeled leukocytes scintigraphy Labeled erythrocytes scintigraphy Ga-67 citrate scintigraphy Fluorodeoxyglucose-positron emission tomography (FDG-PET) 8. 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 higher activity concentration Smaller with a lower activity concentration Larger with a lower activity concentration Larger with a higher activity concentration 9. All of the following cellular mechanisms are responsible for malignant cells increased F-18 fluorodeoxyglucose accumulation EXCEPT: Low glucose-6-phosphatase. Low mitotic rate. Increased membrane transporters. Increased intracellular hexokinase. 10. The usefulness of F-18 FDG PET in infection imaging is based on the fact that granulocytes and macrophages in infectious foci: Have high mitotic rate Have high insulin production Have short life span Have high glucose consumption 1 out of 10 Time's upTime is Up! By Nasser AlMutairi|2021-04-07T10:58:49+03:00April 7th, 2021| 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 ReplyCancel reply
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