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CT Image Production questions with 100% correct answers
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CT Image Production questions with 100% correct answers
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CT Image ProductionIf the rotation time of a scan is decreased, what other exposure parameter should be changed to
maintain the image quality? - correct answer ✔✔increase mA
Which of the following statements correctly describes the flow of electrons through an x ray tube? -
correct answer ✔✔cathode to anode
If mA is decreased by a factor of 2, how is the radiation dose to the patient changed if all other factors
remain unchanged? - correct answer ✔✔Dose is decreased by a factor of 2
X-ray tubes in CT are most similar to the radiation source used within which modality? - correct answer
✔✔Diagnostic radiography
3 things production of x rays in a CT machine requires? - correct answer ✔✔- source of electrons
- means of rapid acceleration of electrons
- means of rapid deceleration of electrons
An increase of which 3 exposure factors would increase the total number of X-ray photons exposing the
detectors? - correct answer ✔✔- increased mA
- increased kVp
- increased rotation time
The specific process that accelerates electron in an x ray tube is? - correct answer ✔✔application of
voltage
What technical change is expected to increase the penetrating ability of an X-ray beam? - correct answer
✔✔Increased kVp
, Compared to general radiography, CT tubes require which of the following? - correct answer ✔✔Larger
heat capacity
The principal advantage of thin detector rows is? - correct answer ✔✔higher spatial resolution
A single "view" acquired during a CT scan is also called a? - correct answer ✔✔Projection
The signal produced by a CT detector is an? - correct answer ✔✔Analog electrical signal
Which component of the CT imaging system is responsible for creating reconstructed image data? -
correct answer ✔✔computer system
The inner rows of a non uniform detector array have the advantage of? - correct answer ✔✔Increased
spatial resolution
Consider two identical scanning protocols, where one has a pitch of 0.73 and the other has a pitch of
0.87. The protocol using a pitch of 0.87 will result in what two differences? - correct answer ✔✔-
decreased scan time
- decreased patient dose
When the pitch is less than 1, how do the resulting views comprise the scan data? - correct answer
✔✔Overlapping views in the scan data
The helical acquisition mode is the most common techniques used for imaging which 3 body sections? -
correct answer ✔✔- chest
- abdomen
- extremities
If the pitch is equal to 1.1, how far is the patient table moving during each rotation of the tube? - correct
answer ✔✔1.1 times the beam width
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