NMTCB Review Latest Update with Verified Solutions

NMTCB Review Latest Update with Verified Solutions 18F-FDG is rarely used to image tumors in the kidney, prostate, or bladder because: FDG is actively excreted in the urine, obscuring tumor uptake in these organs A patient who is maintained on a ventilator is transported to the nuclear medicine department. In the transfer process, it is necessary for the nuclear medicine technologist to compress the Ambu-bag being used to sustain the patient's breathing during transport. The rate for compression of the bag should be approximately: Once every 5 seconds When explaining radiolabeled antibody treatment, an important negative consequence that the patient should be informed of is the potential for Development of antibodies to the radiolabeled antibody The best unit to use when explaining the radiation doses received from different radiologic procedures using ionizing radiation is the: Effective dose in Sieverts The best approach for protecting ancillary equipment such as computer keyboards from infectious agents is to: Cover them with plastic wrap before procedures involving infectious patients Once accessed, a multidose vial should be discarded after: 24 hours A hospitalized patient having a myocardial perfusion scan in the nuclear medicine department complains of mild chest pain. The best response would be to: A bone scan using 18F-sodium fluoride requires a delay of: 45-90 minutes Treatment with 90Y ibritumomab tiuxetan requires pretreatment with: Rituxan On an?111In leukocyte scan, activity is seen only in the liver, spleen, and bone marrow, with the spleen being the most intense.? This could be due to: Damage to the leukocytes during labeling The ability of a material to serve as an intravenous contrast agent for x-ray studies depends on: The total number of grams of iodine In most nuclear medicine studies, it is generally desirable to bring the camera as close to the patient as possible. In which of these imaging situations is this NOT true? Pinhole Collimator If one wishes to include the whole 364-keV photopeak in an 131I imaging window, what is the lowest energy that can be included without including the Compton edge? The goal of preparing a hospital room for a radionuclide therapy patient is to: Of the following types of medications, which will affect the heart rate response of a patient during a treadmill stress test? Beta blockers A gamma camera's stored X-axis offset is large relative to the system's current rotational mechanics. What kind of artifact will be produced? Ring A uniformity correction image for a SPECT camera should contain at least ________ counts per pixel. 10,000 Normalization in a PET scanner involves comparison of: Counts in an individual lor with the average lor counts. The first step in CT scanner daily quality control is the: Tube warm-up A dose calibrator is tested for accuracy and shows an error of -11% compared to the decay-corrected assay of the long-lived reference sample. The dose calibrator should be: Not used at all until it is serviced. Routine checks of the SUV of normal liver parenchyma on FDG scans finds the number to be higher than in the past. The most likely problem is the: A CT phantom test produces ROI measurements that indicate a rising standard deviation or noise index. This is most likely due to: The daily calibration/constancy measurement of a thyroid probe produces a value that is 20% higher than normal. Any of the following could be a reason for this EXCEPT: The calibration procedure was done incorrectly. A measurement using a well counter shows the energy spectrum shifted to the left, such that the photopeak is not centered in the energy window for the chosen isotope. The most likely cause of this is: The activity of the sample being measured is too high. What is being evaluated with chromatography testing of technetium radiopharmaceuticals? Radiochemical purity The use of elliptical and/or body contour orbits in SPECT imaging should result in improved: Spatial resolution Which of the following variables does not affect spatial resolution in nuclear medicine imaging systems? Byte vs. word acquisition mode Full width at half maximum (FWHM) is often used as a measure of: Resolution Uncorrected flood field nonuniformities cause ____________ artifacts in tomographic reconstruction. Circular How many 16-bit words of memory are required for a 64 x 64 byte mode image? 2,048 What are areas of prolonged retention of Xe-133 in the lungs associated with? Obstructive Lung Disease A patient is to undergo a multiple-gated cardiac blood-pool study with the heart cycle divided in 20 frames. The patient is in normal sinus rhythm and has a heart rate of 68 bpm. The computer should lock in at what time per frame for this study? 44 milliseconds Ventricular depolarization occurs just before the ventricles contract, expelling blood forward into the pulmonary artery and aorta. What represents this action on the EKG strip? QRS complex The dose rate during preparation of a radiopharmaceutical is 1.66 mrem/hr. With this rate reduced by 2 HVLs, how many hours would it take a worker to accumulate 10 mrems? 24 hours 10mrem / .415mremperhr = 24 In a euthyroid patient, which of the following describes the result of Cytomel (T3) administration for 8 days prior to a radioactive iodine thyroid uptake? Decreased thyroid uptake A well counter is set to collect 10,000 counts or to stop after 5 minutes. The counter stops at 2 minutes. What is the count rate (in cpm)? 5,000 If a vial containing Tl-201 is found to have an activity of 10.0 mCi at 8 a.m. on Monday, how much activity would remain at 10 a.m. on Friday provided no dose was drawn from this vial (in mCi)? 3.94 mCi x = 10e^-0.693(98/73) High Radiation Area signs are to be posted in areas where exposures greater than ____________ mrem/hr are measured at 30 cm from the source or from any surface through which the radiation penetrates: 100 mrem When a zoom is used during a 64 x 64 byte mode computer acquisition: Spatial resolution is increased Which of the following quality control tests should be performed on a dose calibrator after a power outage? Constancy When processing a gated blood pool study, incorrectly placing the background region over part of the aorta will have what effect on the resulting EF calculation? The result will be higher than patient's true EF When labeling leukocytes with In-111 oxine, what is the next step in the procedure after blood has been drawn in a syringe containing an anticoagulant? Sediment the sample for 50 to 60 minutes What is the most likely cause of activity seen in the liver and spleen during a perfusion lung scan? MAA particles smaller than 5 microns According to national standards, how often should the activity linearity of a dose calibrator be measured? Quarterly Which of the following situations would be considered an absolute contraindication for performing adenosine pharmacological stress testing? Patient drank a couple cups of caffeinated coffee 2 hours prior