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. The usefulness of F-18 FDG PET in infection imaging is based on the fact that granulocytes and macrophages in infectious foci: Have high glucose consumption Have high insulin production Have high mitotic rate Have short life span None 2. F-18 is a cyclotron-produced radioisotope with a half-life approximately of: 110 min. 101 min. 119 min. 11 min. None 3. All of the following cellular mechanisms are responsible for malignant cells increased F-18 fluorodeoxyglucose accumulation EXCEPT: Increased intracellular hexokinase. Low glucose-6-phosphatase. Increased membrane transporters. Low mitotic rate. None 4. Which of the following radionuclides used in PET imaging produces the highest resolution images? N-13. C-11. Rb-82. F-18. 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 Minimizes the patient's movement during the Scan Helps the patient to hold breath Reduces possible artifact formation None 6. The concentration of glucose-6-phosphatase, an enzyme mediating dephosphorylation of FDG-6-phosphate, is low in most tumors EXCEPT: Lung adenocarcinoma. Ductal carcinoma. Hodgkin lymphoma. Hepatocellular carcinoma. None 7. With the administration of oral contrast media for integrated Positron Emission Tomography/Computed Tomography (PET/CT) studies, CT-derived attenuation values are: Underestimated Not applicable Not performed Overestimated None 8. 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 positive and thyroglobulin (Tg) is negative. I-131 whole body scan is negative and thyroglobulin (Tg) is negative. I-131 whole body scan is negative and thyroglobulin (Tg) is positive. None 9. All of the following scintigraphic methods are often used in the diagnosis of fever of unknown origin (FUO) EXCEPT: Labeled erythrocytes scintigraphy Fluorodeoxyglucose-positron emission tomography (FDG-PET) Labeled leukocytes scintigraphy Ga-67 citrate scintigraphy None 10. 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 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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