Quiz: Positron Emission Tomography 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 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. Bone marrow. Muscle. Tumor. 2. 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 insulin production Have high mitotic rate Have short life span 3. With the administration of oral contrast media for integrated Positron Emission Tomography/Computed Tomography (PET/CT) studies, CT-derived attenuation values are: Not applicable Underestimated Overestimated Not performed 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: Arm muscles The diaphragm The peritoneum Leg muscles 5. All of the following cellular mechanisms are responsible for malignant cells increased F-18 fluorodeoxyglucose accumulation EXCEPT: Low mitotic rate. Increased membrane transporters. Increased intracellular hexokinase. Low glucose-6-phosphatase. 6. 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 Larger with a higher activity concentration Larger with a lower activity concentration Smaller with a higher activity concentration 7. Which of the following radionuclides used in PET imaging produces the highest resolution images? N-13. Rb-82. C-11. F-18. 8. The majority of radiation exposure to personnel performing PET/CT procedures comes from the: Unopened dose pig Injected patient PET scanner CT scanner 9. All of the following scintigraphic methods are often used in the diagnosis of fever of unknown origin (FUO) EXCEPT: Ga-67 citrate scintigraphy Labeled erythrocytes scintigraphy Labeled leukocytes scintigraphy Fluorodeoxyglucose-positron emission tomography (FDG-PET) 10. 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 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. 1 out of 10 Time's upTime is Up! By Nasser AlMutairi|2021-09-20T13:16:27+03:00April 15th, 2021|Positron Emission Tomography| Share This Post With Others! FacebookXLinkedInWhatsAppPinterestEmail About the Author: Nasser AlMutairi Senior Nuclear Medicine Specialist at Hafar Al-Batin Central Hospital, Founder of NuclearMed Website. Leave a ReplyCancel reply
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