اختبار: الأشعة البوزيتورنية 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 Labeled erythrocytes scintigraphy Labeled leukocytes scintigraphy Fluorodeoxyglucose-positron emission tomography (FDG-PET) None 2. 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: The diaphragm Leg muscles Arm muscles The peritoneum None 3. The majority of radiation exposure to personnel performing PET/CT procedures comes from the: Injected patient CT scanner PET scanner Unopened dose pig None 4. 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 Reduces possible artifact formation Helps the patient to hold breath Maximizes extension of the spine None 5. 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 mitotic rate Have high insulin production Have high glucose consumption 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: 155 mg/dl. 120 mg/dl. 200 mg/dl. 175 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: Shunt glucose to skeletal and cardiac muscles. Increase blood pressure. Decrease heart rate. Induce hyperglycemia. None 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: Larger with a higher activity concentration Smaller with a lower activity concentration Larger with a lower activity concentration Smaller with a higher activity concentration None 9. 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 the study regardless the system type or field strength Perform PET only. None 10. Which of the following radionuclides used in PET imaging produces the highest resolution images? F-18. N-13. Rb-82. C-11. None 1 out of 10 Time's upTime is Up! بواسطة ناصر المطيري|2021-09-20T14:26:18+03:00أبريل 15th, 2021|الأشعة البوزيترونية|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. اضف تعليقا إلغاء الردتعليق أعلمني بمتابعة التعليقات بواسطة البريد الإلكتروني. أعلمني بالمواضيع الجديدة بواسطة البريد الإلكتروني. Δ
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