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. All of the following cellular mechanisms are responsible for malignant cells increased F-18 fluorodeoxyglucose accumulation EXCEPT: Low glucose-6-phosphatase. Increased intracellular hexokinase. Increased membrane transporters. Low mitotic rate. None 2. F-18 is a cyclotron-produced radioisotope with a half-life approximately of: 110 min. 11 min. 101 min. 119 min. None 3. The usefulness of F-18 FDG PET in infection imaging is based on the fact that granulocytes and macrophages in infectious foci: Have short life span Have high mitotic rate Have high insulin production Have high glucose consumption None 4. F-18 FDG uptake in tumors correlates with tumor: Volume and stability. Shape and reproducibility. Size and contractility. Growth and viability. None 5. 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: 120 mg/dl. 200 mg/dl. 175 mg/dl. 155 mg/dl. None 6. The concentration of glucose-6-phosphatase, an enzyme mediating dephosphorylation of FDG-6-phosphate, is low in most tumors EXCEPT: Ductal carcinoma. Hepatocellular carcinoma. Hodgkin lymphoma. Lung adenocarcinoma. None 7. Which of the following radionuclides used in PET imaging produces the highest resolution images? Rb-82. F-18. N-13. C-11. None 8. 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: Tumor. Bone marrow. Muscle. Blood pool. None 9. 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 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. 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 the study regardless the system type or field strength Perform PET only. Perform the exam using 0.5 Tesla systems or less 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
Leave A Comment