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. 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 Maximizes extension of the spine Helps the patient to hold breath None 2. The concentration of glucose-6-phosphatase, an enzyme mediating dephosphorylation of FDG-6-phosphate, is low in most tumors EXCEPT: Lung adenocarcinoma. Hepatocellular carcinoma. Hodgkin lymphoma. Ductal carcinoma. None 3. 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 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 positive and thyroglobulin (Tg) is positive. None 4. 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 5. All of the following scintigraphic methods are often used in the diagnosis of fever of unknown origin (FUO) EXCEPT: Labeled leukocytes scintigraphy Labeled erythrocytes scintigraphy Fluorodeoxyglucose-positron emission tomography (FDG-PET) Ga-67 citrate scintigraphy None 6. F-18 is a cyclotron-produced radioisotope with a half-life approximately of: 101 min. 110 min. 119 min. 11 min. 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. 155 mg/dl. 120 mg/dl. None 8. The majority of radiation exposure to personnel performing PET/CT procedures comes from the: CT scanner Injected patient PET scanner Unopened dose pig 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 PET only. Perform the study regardless the system type or field strength None 10. 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: Decrease heart rate. Induce hyperglycemia. Shunt glucose to skeletal and cardiac muscles. Increase blood pressure. 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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