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: Ga-67 citrate scintigraphy Fluorodeoxyglucose-positron emission tomography (FDG-PET) Labeled leukocytes scintigraphy Labeled erythrocytes scintigraphy 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? It is contraindicated to perform the exam as titanium alloy is ferromagnetic Perform the exam using 0.5 Tesla systems or less Perform PET only. Perform the study regardless the system type or field strength 3. Which of the following radionuclides used in PET imaging produces the highest resolution images? Rb-82. N-13. F-18. C-11. 4. 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: Larger with a higher activity concentration Larger with a lower activity concentration Smaller with a higher activity concentration Smaller with a lower activity concentration 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? Minimizes the patient's movement during the Scan Helps the patient to hold breath Reduces possible artifact formation Maximizes extension of the spine 6. The concentration of glucose-6-phosphatase, an enzyme mediating dephosphorylation of FDG-6-phosphate, is low in most tumors EXCEPT: Lung adenocarcinoma. Hodgkin lymphoma. Hepatocellular carcinoma. Ductal carcinoma. 7. 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. 8. The usefulness of F-18 FDG PET in infection imaging is based on the fact that granulocytes and macrophages in infectious foci: Have short life span Have high insulin production Have high mitotic rate Have high glucose consumption 9. 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 negative and thyroglobulin (Tg) is positive. 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. 10. 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: Leg muscles The peritoneum The diaphragm Arm muscles 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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