TBR-CT - Training From The BACK Of The Room Certified Trainer
TBR-CT - Training from the BACK of the Room Certified Trainer
Exam (elaborations)
CT Test -2 Questions with correct Answers
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TBR-CT - Training from the BACK of the Room Certified Trainer
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TBR-CT - Training From The BACK Of The Room Certified Trainer
Exam of 6 pages for the course TBR-CT - Training from the BACK of the Room Certified Trainer at TBR-CT - Training from the BACK of the Room Certified Trainer (CT Test -2)
A patient is being positioned for a routine scan of the brain. Why is he asked to tuck his
chin down toward his chest?
A. So that the scan time can be reduced
B. To allow immobilization sponges to be used
C. To reduce the radiation exposure tot he lens of the eyes
D. To eliminate the need to tilt the gantry sot hat the axial scan mode can be used -
answerC.
What is the expected HU value of a measurement taken in a lateral ventricle?
A. -70 to -60
B. 4 to 8
C. 20 to 30
D. 40 to 50 - answerB.
Which is a typical injection protocol for a routine examination of the brain?
A. 100 mL delivered at 1 mL/s, scan delay of 5 minutes
B. 150 mL delivered at 2 mL/s, scan begin when injection is complete
C. Split bolus: 50 mL delivered at 1.5 mL/s, wait 2 minutes, 50 mL delivered at 1.5 mL/s,
scans begin when second injection is compelte
D. 60 mL (concentration 370), delivered at 4 mL/s, scan delay from timing bolus using
the carotid artery as the reference vessel - answerA.
Compared with a cerebral CTA, what parameter must be changed for a cerebral CTV?
A. Slice thickness is reduced
B. Delay from the start of injection to the start of scanning is increased
C. Scans are performed in the axial mode, rather than the helical mode
D. kVp is increased - answerB.
Which is TRUE statement regarding an emergency department patient who is
suspected of suffering from an acute stroke?
A. A CT scan of the head is only done if the patient has a previous history of stroke
B. An MRI of the head is the first choice of imaging procedure; a CT of the head is only
done if an MRI cannot be done within 24 hours
C. A CT scan of the head must be done as soon as possible because it is a necessary
examination in determining whether a patient can receive t-PA treatment
, D. An unenhanced CT scan will provide no useful information in the diagnosis and
treatment of acute stroke. Only CTA and CT perfusion studies are indicated - answerC.
What is the goal in performing perfusion studies for patients with acute stroke?
A. To determine whether the stroke is hemorrhagic or ischemic
B. To determine the onset time of the stroke
C. To depict the spatial relationship of complex vascular lesions to the surrounding
structures
D. To distinguish infarcted tissue from the penumbra - answerD.
When performing a CT study of the brain, what effect will moving the patient's chin up or
down have? - answer
Describe how a patient can be positioned so that data can be acquired of the head in
the coronal plane? - answer
Describe the appearance of intracranial hemorrhage on the CT image - answerAcute
hemorrhage is marked hyperdense
Why might the split bolus method of contrast administration be used for CT studies of
the neck? Describe the technique - answerThe total contrast dose is split in half. The
first dose is delivered and a delay of 2 min is observed. This allows time for slow-
enhancing structures to become opacified. Then the second bolus is given and scan
begins soon after the injection is complete to re-opacify the vasculature. Used for
routine neck and for maxillofacial studies.
CT scans of the spine are often performed after a myelogram. What special
consideration must be given for the intrathecal contrast material? - answer- Rolling the
patient one to two times before scanning so the contrast coats
- Delay CT scanning 1 to 3 hours between the intrathecal injection and scanning to
allow the contrast to become more dilute so not to obscure structures from streaking.
Explain why CT plays such a crucial role in the assessment and treatment of acute
stroke - answer
What information do CT brain perfusion scans provide that is not available on
unenhanced CT of the brain? - answer
List the qualities of an IV access site that would make it ideal for administering contrast
media - answerSuperficial venous anatomy of the upper extremity is great. The
antecubital or large forearm veins are the preferred venous site when an injector is
used.
In what circumstances can be peripherally inserted central catheter safely be used for
contrast media injection? - answerYou should check the patency of the catheter before
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