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: Increased membrane transporters. Increased intracellular hexokinase. Low glucose-6-phosphatase. Low mitotic rate. None 2. 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: 175 mg/dl. 120 mg/dl. 155 mg/dl. 200 mg/dl. None 3. 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 Helps the patient to hold breath Reduces possible artifact formation Maximizes extension of the spine None 4. Which of the following radionuclides used in PET imaging produces the highest resolution images? F-18. Rb-82. C-11. N-13. None 5. 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: Increase blood pressure. Shunt glucose to skeletal and cardiac muscles. Induce hyperglycemia. Decrease heart rate. None 6. The concentration of glucose-6-phosphatase, an enzyme mediating dephosphorylation of FDG-6-phosphate, is low in most tumors EXCEPT: Hepatocellular carcinoma. Hodgkin lymphoma. Lung adenocarcinoma. Ductal carcinoma. None 7. With the administration of oral contrast media for integrated Positron Emission Tomography/Computed Tomography (PET/CT) studies, CT-derived attenuation values are: Not performed Not applicable Overestimated Underestimated None 8. 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 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. I-131 whole body scan is negative and thyroglobulin (Tg) is positive. None 9. 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. Tumor. Muscle. None 10. F-18 FDG uptake in tumors correlates with tumor: Size and contractility. Shape and reproducibility. Volume and stability. Growth and viability. None 1 out of 10 Time's upTime is Up! By Nasser AlMutairi|2021-04-07T10:58:49+03:00April 7th, 2021| 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 Comment Cancel replyComment Δ
Leave A Comment