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. With the administration of oral contrast media for integrated Positron Emission Tomography/Computed Tomography (PET/CT) studies, CT-derived attenuation values are: Overestimated Underestimated Not applicable Not performed 2. F-18 is a cyclotron-produced radioisotope with a half-life approximately of: 11 min. 101 min. 110 min. 119 min. 3. The majority of radiation exposure to personnel performing PET/CT procedures comes from the: Injected patient PET scanner Unopened dose pig CT scanner 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 diaphragm The peritoneum Arm muscles 5. 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 Labeled erythrocytes scintigraphy Fluorodeoxyglucose-positron emission tomography (FDG-PET) 6. 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? Perform PET only. Perform the exam using 0.5 Tesla systems or less It is contraindicated to perform the exam as titanium alloy is ferromagnetic Perform the study regardless the system type or field strength 7. The time from F-18 fluorodeoxyglucose (FDG) administration to the time of data acquisition has been shown to have a marked effect on FDG uptake. An increased interval between the injection and imaging uptake time will DECREASE radiotracer concentration in: Muscle. Tumor. Bone marrow. Blood pool. 8. 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. 9. 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: 200 mg/dl. 120 mg/dl. 155 mg/dl. 175 mg/dl. 10. 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 mitotic rate Have high insulin production Have short life span 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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