In each blank, try to type in the
word that is missing. If you've
typed in the correct word, the
blank will turn green.
If your not sure what answer should be entered, press the space bar and the next missing letter will be displayed. When you are all done, you should look back over all your answers and review the ones in red. These ones in red are the ones which you needed help on. Question: A patient is being positioned for a routine scan of the . Why is he asked to tuck his chin down toward his chest?Answer: To the radiation exposure to the lens of the eyes Question: What is the HU value of a measurement taken in a lateral ventricle?Answer: 4 to Question: is a typical injection protocol for a routine examination of the brain?Answer: 100 mL delivered at 1 mL/s, scan delay of 5 Question: Compared with a CTA, what parameter must be changed for a cerebral CTV?Answer: Delay from the of injection to the start of scanning is increased Question: What is the goal in performing perfusion for patients with acute stroke?Answer: To distinguish tissue from the penumbra Question: For what study data be acquired while the patient is lying prone on the CT table?Answer: High-resolution CT Question: A volumetric HRCT study to a protocol that includes:Answer: A sampling technique that is intended to provide areas of the lung Question: Why do many protocols for the evaluation of PE scan in the -to-cranial direction?Answer: To artifacts attributable to patient motion Question: What must happen to a thrombus for it to be to as an embolus?Answer: It must detach from its site Question: At a particular institution the PE protocol includes a second scan series, performed 180 after the IV contrast. What is the purpose of this second series?Answer: To check the pelvis and extremities for deep vein thrombosis Question: What heart valve is located between the right atrium and the ventricle?Answer: Tricuspid Question: B-blockers are likely to be used as part of a CT protocol when the:Answer: 's heart rate is higher than 65 bpm Question: An imaging technique that attempts to acquire data only during cardiac segments with the lowest cardiac motion is :Answer: ECG triggering Question: A patient who is scheduled for a CT study has an irregular heartbeat with a rate of approximately 85 bpm. For which indication is this the most problematic?Answer: coronary disease Question: Why is it recommended that cardiac CT calcium scoring be restricted to patients with risk for coronary artery disease, rather than using it as a screening tool for all patients?Answer: risks related to the radiation dose are a concern; for asymptomatic with no cardiac risk factors, it is not certain that the benefit of the exam outweighs the risks from the radiation exposure Question: Although patient compliance can sometime be a factor, what volume of oral contrast is typically considered the minimum amount needed for a routine CT study of the abdomen and ?Answer: 600 Question: Which is a window setting used to visualize liver lesions?Answer: 350 ww; 70 Question: A noncontrast CT of the abdomen is ordered on Mr. Smith. The primary indication is a 15-year history of alcoholism. What can the do to help the radiologist determine whether the patient has a fatty liver?Answer: Place a region of interest HU within the liver and spleen before filming Question: The of liver enhancement that occurs 60 to 70 seconds after an IV bolus injection is called the:Answer: venous phase Question: For what clinical might a dual-phase (late arterial and portal venous) CT of the abdomen be requested?Answer: to assess possible metastasis from a primary thyroid tumor Question: The nephrogram phase is seen approximately ____ after IV contrast injection.Answer: 110 Question: An adrenal mass that measure less than or equal to 10 HU on CT:Answer: is an Question: What explains the in clinical presentation of acute appendicitis?Answer: the variable position of the Question: A focused appendiceal CT refers to a scan that:Answer: the scan area to the lower abdomen and upper pelvis Question: What percentage of urinary tract will be seen on non contrast helical computed tomography?Answer: 99% Question: Why are isotropic voxels particularly in images of the musculoskeletal system?Answer: isotropic enable MPR images to be created in any plane with the same spatial resolution as the original sections Question: Why is it recommended to position the patient for a shoulder CT so that the arm is extended over the patient's head?Answer: to streak artifacts |
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