اختبار: الأشعة البوزيتورنية 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. 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 Leg muscles The peritoneum 2. 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 positive and thyroglobulin (Tg) is negative. I-131 whole body scan is negative and thyroglobulin (Tg) is negative. I-131 whole body scan is negative and thyroglobulin (Tg) is positive. 3. Which of the following radionuclides used in PET imaging produces the highest resolution images? N-13. Rb-82. F-18. C-11. 4. F-18 is a cyclotron-produced radioisotope with a half-life approximately of: 110 min. 119 min. 101 min. 11 min. 5. 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 lower activity concentration Larger with a higher activity concentration Smaller with a higher activity concentration 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 the study regardless the system type or field strength 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. 7. 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 short life span Have high insulin production 8. With the administration of oral contrast media for integrated Positron Emission Tomography/Computed Tomography (PET/CT) studies, CT-derived attenuation values are: Not performed Underestimated Not applicable Overestimated 9. The majority of radiation exposure to personnel performing PET/CT procedures comes from the: PET scanner Unopened dose pig Injected patient CT scanner 10. All of the following cellular mechanisms are responsible for malignant cells increased F-18 fluorodeoxyglucose accumulation EXCEPT: Increased intracellular hexokinase. Low mitotic rate. Increased membrane transporters. Low glucose-6-phosphatase. 1 out of 10 Time is Up! Time's up بواسطة ناصر المطيري|2021-09-20T14:26:18+03:00أبريل 15th, 2021|الأشعة البوزيترونية|لا توجد تعليقات شارك هذه الصفحة, واترك رأيك حول الموضوع باستخدام وسيلة التواصل التي تناسبك FacebookTwitterLinkedInWhatsAppPinterestEmail عن: ناصر المطيري كبير أخصائيي الطب النووي في مستشفى حفر الباطن المركزي و مؤسس موقع نيوكليرمد. اترك تعليقاً Cancel reply
اترك تعليقاً