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. 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. Shunt glucose to skeletal and cardiac muscles. Increase blood pressure. Decrease heart rate. 2. All of the following scintigraphic methods are often used in the diagnosis of fever of unknown origin (FUO) EXCEPT: Labeled leukocytes scintigraphy Fluorodeoxyglucose-positron emission tomography (FDG-PET) Labeled erythrocytes scintigraphy Ga-67 citrate scintigraphy 3. Which of the following radionuclides used in PET imaging produces the highest resolution images? C-11. N-13. Rb-82. F-18. 4. The concentration of glucose-6-phosphatase, an enzyme mediating dephosphorylation of FDG-6-phosphate, is low in most tumors EXCEPT: Ductal carcinoma. Lung adenocarcinoma. Hodgkin lymphoma. Hepatocellular carcinoma. 5. The majority of radiation exposure to personnel performing PET/CT procedures comes from the: Unopened dose pig CT scanner Injected patient PET scanner 6. All of the following cellular mechanisms are responsible for malignant cells increased F-18 fluorodeoxyglucose accumulation EXCEPT: Low glucose-6-phosphatase. Increased intracellular hexokinase. Low mitotic rate. Increased membrane transporters. 7. F-18 is a cyclotron-produced radioisotope with a half-life approximately of: 110 min. 101 min. 119 min. 11 min. 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. 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 Smaller with a higher activity concentration Larger with a lower activity concentration Smaller with a lower activity concentration 10. F-18 FDG uptake in tumors correlates with tumor: Shape and reproducibility. Size and contractility. Growth and viability. Volume and stability. 1 out of 10 Time's upTime is Up! بواسطة ناصر المطيري|2021-04-07T10:58:49+03:00أبريل 7th, 2021|لا توجد تعليقات شارك هذه الصفحة, واترك رأيك حول الموضوع باستخدام وسيلة التواصل التي تناسبك FacebookXLinkedInWhatsAppPinterestEmail عن: ناصر المطيري كبير أخصائيي الطب النووي في مستشفى حفر الباطن المركزي و مؤسس موقع نيوكليرمد. اترك تعليقاًCancel reply
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