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 concentration of glucose-6-phosphatase, an enzyme mediating dephosphorylation of FDG-6-phosphate, is low in most tumors EXCEPT: Ductal carcinoma. Lung adenocarcinoma. Hepatocellular carcinoma. Hodgkin lymphoma. None 2. 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: Blood pool. Muscle. Bone marrow. Tumor. None 3. All of the following scintigraphic methods are often used in the diagnosis of fever of unknown origin (FUO) EXCEPT: Fluorodeoxyglucose-positron emission tomography (FDG-PET) Ga-67 citrate scintigraphy Labeled erythrocytes scintigraphy Labeled leukocytes scintigraphy 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 Arm muscles The diaphragm The peritoneum None 5. All of the following cellular mechanisms are responsible for malignant cells increased F-18 fluorodeoxyglucose accumulation EXCEPT: Low mitotic rate. Low glucose-6-phosphatase. Increased intracellular hexokinase. Increased membrane transporters. None 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 study regardless the system type or field strength Perform the exam using 0.5 Tesla systems or less It is contraindicated to perform the exam as titanium alloy is ferromagnetic None 7. 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. 175 mg/dl. 120 mg/dl. 155 mg/dl. 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: Smaller with a lower activity concentration Smaller with a higher activity concentration Larger with a lower activity concentration Larger with a higher activity concentration 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 insulin production Have high mitotic rate Have high glucose consumption Have short life span None 10. The majority of radiation exposure to personnel performing PET/CT procedures comes from the: Unopened dose pig CT scanner PET scanner Injected patient None 1 out of 10 Time's upTime is Up! By Nasser AlMutairi|2021-04-07T10:58:49+03:00April 7th, 2021| شارك هذه الصفحة FacebookXLinkedInWhatsAppPinterestEmail About the Author: Nasser AlMutairi Senior Nuclear Medicine Specialist at Hafar Al-Batin Central Hospital, Founder of NuclearMed Website. Leave A Comment Cancel replyComment Δ
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