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RAD 0318 Part II Test

Enter the letter for the matching Answer
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1.
Which is a window setting used to visualize subtle liver lesions?
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2.
Why is it recommended that cardiac CT calcium scoring be restricted to patients with risk factors for coronary artery disease, rather than using it as a screening tool for all patients?
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3.
Why do many protocols for the evaluation of PE scan in the caudal-to-cranial direction?
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4.
A focused appendiceal CT refers to a scan protocol that:
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5.
A patient is being positioned for a routine scan of the brain. Why is he asked to tuck his chin down toward his chest?
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6.
At a particular institution the PE protocol includes a second scan series, performed 180 seconds after the IV contrast. What is the purpose of this second series?
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7.
B-blockers are likely to be used as part of a cardiac CT protocol when the:
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8.
What explains the diversity in clinical presentation of acute appendicitis?
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9.
A noncontrast CT of the abdomen is ordered on Mr. Smith. The primary indication is a 15-year history of alcoholism. What can the technologist do to help the radiologist determine whether the patient has a fatty liver?
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10.
A volumetric HRCT study refers to a protocol that includes:
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11.
An imaging technique that attempts to acquire data only during cardiac segments with the lowest cardiac motion is called:
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12.
What must happen to a thrombus for it to be referred to as an embolus?
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13.
What percentage of urinary tract calculi will be seen on non contrast helical computed tomography?
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14.
Compared with a cerebral CTA, what parameter must be changed for a cerebral CTV?
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15.
Which is a typical injection protocol for a routine examination of the brain?
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16.
For what clinical indication might a dual-phase (late arterial and portal venous) CT of the abdomen be requested?
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17.
Why is it recommended to position the patient for a shoulder CT so that the unaffected arm is extended over the patient's head?
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18.
What is the goal in performing perfusion studies for patients with acute stroke?
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19.
Why are isotropic voxels particularly important in images of the musculoskeletal system?
A.
to reduce streak artifacts
B.
To reduce the radiation exposure to the lens of the eyes
C.
To distinguish infarcted tissue from the penumbra
D.
patient's heart rate is higher than 65 bpm
E.
Place a region of interest HU measurement within the liver and spleen before filming
F.
350 ww; 70 wl
G.
to assess possible liver metastasis from a primary thyroid tumor
H.
limits the scan area to the lower abdomen and upper pelvis
I.
the variable position of the appendix
J.
risks related to the radiation dose are a concern; for asymptomatic patients with no cardiac risk factors, it is not certain that the benefit of the exam outweighs the risks from the radiation exposure
K.
Delay from the start of injection to the start of scanning is increased
L.
100 mL delivered at 1 mL/s, scan delay of 5 minutes
M.
It must detach from its original site
N.
isotropic voxels enable MPR images to be created in any plane with the same spatial resolution as the original sections
O.
To reduce artifacts attributable to patient motion
P.
99%
Q.
prospective ECG triggering
R.
A sampling technique that is intended to provide representative areas of the lung
S.
To check the pelvis and lower extremities for deep vein thrombosis
Type the Answer that corresponds to the displayed Question.
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20.
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 pelvis?
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21.
A patient who is scheduled for a CT study has an irregular heartbeat with a rate of approximately 85 bpm. For which clinical indication is this the most problematic?
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22.
An adrenal mass that measure less than or equal to 10 HU on unenhanced CT:
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23.
The nephrogram phase is seen approximately ____ after IV contrast injection.
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24.
What is the expected HU value of a measurement taken in a lateral ventricle?
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25.
What heart valve is located between the right atrium and the right ventricle?
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26.
The phase of liver enhancement that occurs 60 to 70 seconds after an IV bolus injection is called the:
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27.
For what study might data be acquired while the patient is lying prone on the CT table?

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