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. 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 negative. 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 positive. None 2. All of the following scintigraphic methods are often used in the diagnosis of fever of unknown origin (FUO) EXCEPT: Labeled leukocytes scintigraphy Ga-67 citrate scintigraphy Fluorodeoxyglucose-positron emission tomography (FDG-PET) Labeled erythrocytes scintigraphy None 3. F-18 FDG uptake in tumors correlates with tumor: Shape and reproducibility. Volume and stability. Growth and viability. Size and contractility. None 4. 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 None 5. Which of the following radionuclides used in PET imaging produces the highest resolution images? F-18. C-11. Rb-82. N-13. None 6. F-18 is a cyclotron-produced radioisotope with a half-life approximately of: 101 min. 119 min. 110 min. 11 min. None 7. 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 Larger with a lower activity concentration Smaller with a lower activity concentration Larger with a higher activity concentration None 8. 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 Reduces possible artifact formation Helps the patient to hold breath None 9. 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 glucose consumption Have high insulin production Have short life span None 10. All of the following cellular mechanisms are responsible for malignant cells increased F-18 fluorodeoxyglucose accumulation EXCEPT: Increased membrane transporters. Low mitotic rate. Low glucose-6-phosphatase. Increased intracellular hexokinase. None 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. اضف تعليقا إلغاء الردتعليق Δ
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